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Jiang Z, Li H, Yuan Z, Wang Z, Fan M, Miao W, He H. Constructing extrinsic oxygen vacancy on the surface of photocatalyst as CO 2 and electrons reservoirs to improve photocatalytic CO 2 reduction activity. J Environ Sci (China) 2024; 140:37-45. [PMID: 38331513 DOI: 10.1016/j.jes.2023.03.027] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/21/2022] [Revised: 03/23/2023] [Accepted: 03/23/2023] [Indexed: 02/10/2024]
Abstract
Constructing own oxygen vacancies in the photocatalysts is a very promising method to improve their photocatalytic CO2 reduction activity. However, some catalysts have excellent stabilities, making it difficult for them to construct their own oxygen vacancies. To simplify the above difficulty of stable photocatalysts, constructing extrinsic oxygen vacancies on their surface as a novel idea is proposed. Here, a stable TiO2 nanosheet is chosen as a research object, we uniformly deposited BiOCl quantum dots on their surface via a simple adsorption-deposition method. It is found that BiOCl quantum dots are able to simultaneously self-transform into defective BiOCl with many oxygen vacancies when the photocatalyst is performed photocatalytic CO2 reduction. These extrinsic oxygen vacancies can act as "CO2 and photo-generated electrons reservoirs" to improve CO2 capture and accelerate the separation of photogenerated electrons and holes. For the above reasons, the modified TiO2 showed obvious enhancement of photocatalytic CO2 reduction compared to pristine TiO2 and BiOCl. This work may open a new avenue to broaden the use of oxygen vacancies in the process of photocatalytic CO2 reduction.
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Affiliation(s)
- Zaiyong Jiang
- State Key Joint Laboratory of Environment Simulation and Pollution Control, Research Center for Eco-Environmental Sciences, Chinese Academy of Sciences, Beijing 100085, China; School of Chemistry & Chemical Engineering and Environmental Engineering, Weifang University, Weifang, Shandong 261061, China
| | - Hao Li
- State Key Joint Laboratory of Environment Simulation and Pollution Control, Research Center for Eco-Environmental Sciences, Chinese Academy of Sciences, Beijing 100085, China
| | - Zhimin Yuan
- School of Chemistry & Chemical Engineering and Environmental Engineering, Weifang University, Weifang, Shandong 261061, China
| | - Zheng Wang
- State Key Joint Laboratory of Environment Simulation and Pollution Control, Research Center for Eco-Environmental Sciences, Chinese Academy of Sciences, Beijing 100085, China
| | - Maohong Fan
- Departments of Chemical and Petroleum Engineering, University of Wyoming, Laramie, WY 82071, USA.
| | - Wenkang Miao
- Materials Genome Institute, Shanghai University, Shanghai 200444, China.
| | - Hong He
- State Key Joint Laboratory of Environment Simulation and Pollution Control, Research Center for Eco-Environmental Sciences, Chinese Academy of Sciences, Beijing 100085, China.
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2
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Li BH, Zhang KH, Wang XJ, Li YP, Liu X, Han BH, Li FT. Construction synergetic adsorption and activation surface via confined Cu/Cu 2O and Ag nanoparticles on TiO 2 for effective conversion of CO 2 to CH 4. J Colloid Interface Sci 2024; 660:961-973. [PMID: 38281477 DOI: 10.1016/j.jcis.2024.01.159] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/14/2023] [Revised: 01/04/2024] [Accepted: 01/22/2024] [Indexed: 01/30/2024]
Abstract
High-performance photocatalysts for catalytic reduction of CO2 are largely impeded by inefficient charge separation and surface activity. Reasonable design and efficient collaboration of multiple active sites are important for attaining high reactivity and product selectivity. Herein, Cu-Cu2O and Ag nanoparticles are confined as dual sites for assisting CO2 photoreduction to CH4 on TiO2. The introduction of Cu-Cu2O leads to an all-solid-state Z-scheme heterostructure on the TiO2 surface, which achieves efficient electron transfer to Cu2O and adsorption and activation of CO2. The confined nanometallic Ag further enhances the carrier's separation efficiency, promoting the conversion of activated CO2 molecules to •COOH and further conversion to CH4. Particularly, this strategy is highlighted on the TiO2 system for a photocatalytic reduction reaction of CO2 and H2O with a CH4 generation rate of 62.5 μmol∙g-1∙h-1 and an impressive selectivity of 97.49 %. This work provides new insights into developing robust catalysts through the artful design of synergistic catalytic sites for efficient photocatalytic CO2 conversion.
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Affiliation(s)
- Bo-Hui Li
- Hebei Key Laboratory of Photoelectric Control on Surface and Interface, College of Science, Hebei University of Science and Technology, Shijiazhuang 050018, China
| | - Kai-Hua Zhang
- Hebei Key Laboratory of Photoelectric Control on Surface and Interface, College of Science, Hebei University of Science and Technology, Shijiazhuang 050018, China
| | - Xiao-Jing Wang
- Hebei Key Laboratory of Photoelectric Control on Surface and Interface, College of Science, Hebei University of Science and Technology, Shijiazhuang 050018, China.
| | - Yu-Pei Li
- Hebei Key Laboratory of Photoelectric Control on Surface and Interface, College of Science, Hebei University of Science and Technology, Shijiazhuang 050018, China
| | - Xinying Liu
- Institute for the Development of Energy for African Sustainability (IDEAS), University of South Africa (UNISA), Florida 1710, South Africa
| | - Bao-Hang Han
- CAS Key Laboratory of Nanosystem and Hierarchical Fabrication, CAS Center for Excellence in Nanoscience, National Center for Nanoscience and Technology, Beijing 100190, China
| | - Fa-Tang Li
- Hebei Key Laboratory of Photoelectric Control on Surface and Interface, College of Science, Hebei University of Science and Technology, Shijiazhuang 050018, China.
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Yu C, Sun J, Xia C, Wang Y, Zhang J, Cai R, Cui J, Tan HH, Zhang Y, Wu Y. Coupling ultrafine TiO 2 within pyridinic-N enriched porous carbon towards high-rate and long-life sodium ion capacitors. J Colloid Interface Sci 2024; 660:934-942. [PMID: 38280286 DOI: 10.1016/j.jcis.2024.01.080] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/25/2023] [Revised: 01/09/2024] [Accepted: 01/12/2024] [Indexed: 01/29/2024]
Abstract
Coupling TiO2 within N-doped porous carbon (NPC) is essential for enhancing its Na+ storage performance. However, the role of different N configurations in NPC in improving the electrochemical performance of TiO2 is currently unknown. In this study, melamine is deliberately incorporated as a pore-forming agent in the self-assembly process of metal organic framework precursors (NH2-MIL-125(Ti)). This intentional inclusion of melamine leads to the one-pot and in-situ formation of highly active edge-N, which is vital for the development of TiO2/NPC with exceptional reactivity. Electrochemical performance characterization and density functional theory (DFT) calculation indicate that the interaction between TiO2 and pyridinic-N enriched NPC can effectively narrow the bandgap of TiO2/NPC, thereby significantly improving electron/ion transfer. Additionally, the abundant mesoporous channels, high N content and oxygen vacancies also contribute to the fast reaction kinetics of TiO2/NPC. As a result, the optimized TiO2/NPC-M, with high proportion of pyridinic-N (44.1 %) and abundant mesoporous channels (97.8 %), delivers high specific capacity of 282.1 mA h-1 at 0.05 A g-1, superior rate capability of 177.3 mA h-1 at 10 A g-1, and prominent capacity retention of 89.3 % over 5000 cycles even under ultrahigh 10 A g-1. Furthermore, the TiO2/NPC-M//AC sodium ion capacitors (SIC) device achieves a high energy density of 136.7 Wh kg-1 at 200 W kg-1. This research not only offers fresh perspectives on the production of high-performance TiO2-based anodes, but also paves the way for customizing other active materials for energy storage and beyond.
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Affiliation(s)
- Cuiping Yu
- School of Materials Science and Engineering, Hefei University of Technology, Hefei 230009, China
| | - Jianjian Sun
- School of Materials Science and Engineering, Hefei University of Technology, Hefei 230009, China
| | - Chenhong Xia
- School of Materials Science and Engineering, Hefei University of Technology, Hefei 230009, China
| | - Yan Wang
- School of Materials Science and Engineering, Hefei University of Technology, Hefei 230009, China; Institute of Energy, Hefei Comprehensive National Science Center (Anhui Energy Laboratory), Hefei 230051, China.
| | - Jianfang Zhang
- School of Materials Science and Engineering, Hefei University of Technology, Hefei 230009, China; Key Laboratory of Advanced Functional Materials and Devices of Anhui Province, Hefei University of Technology, Hefei 230009, China
| | - Rui Cai
- School of Materials Science and Engineering, Hefei University of Technology, Hefei 230009, China
| | - Jiewu Cui
- School of Materials Science and Engineering, Hefei University of Technology, Hefei 230009, China
| | - Hark Hoe Tan
- Department of Electronic Materials Engineering, Research School of Physics, The Australian National University, Canberra, Australian Capital Territory 2601, Australia
| | - Yong Zhang
- School of Materials Science and Engineering, Hefei University of Technology, Hefei 230009, China; Key Laboratory of Advanced Functional Materials and Devices of Anhui Province, Hefei University of Technology, Hefei 230009, China
| | - Yucheng Wu
- School of Materials Science and Engineering, Hefei University of Technology, Hefei 230009, China; Key Laboratory of Advanced Functional Materials and Devices of Anhui Province, Hefei University of Technology, Hefei 230009, China; China International S&T Cooperation Base for Advanced Energy and Environmental Materials & Anhui Provincial International S&T Cooperation Base for Advanced Energy Materials, Hefei University of Technology, Hefei 230009, China.
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Guan J, Li D, Feng J, Xu P, Li Z, Ge S, Chen H, Zhang K. Enhanced photocatalytic ammonia oxidation activity and nitrogen selectivity over Ag/AgCl/N-TiO 2 photocatalyst. J Environ Sci (China) 2024; 138:395-405. [PMID: 38135405 DOI: 10.1016/j.jes.2023.03.021] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/19/2022] [Revised: 03/14/2023] [Accepted: 03/15/2023] [Indexed: 12/24/2023]
Abstract
The removal of ammonia (NH3) emitted from agricultural and industrial activities is of great significance to protect human health and ecological environment. Photocatalytic NH3 oxidation to N2 under mild conditions is a promising strategy. However, developing visible light photocatalysts for NH3 oxidation is still in its infancy. Here, we fabricate N-TiO2 and Ag/AgCl/N-TiO2 photocatalysts by sol-gel and photodeposition methods, respectively. The introduction of N not only endows TiO2 with visible light response (absorption edge at 460 nm) but also results in the formation of heterophase junction (anatase and rutile). Thus, N-TiO2 shows 2.0 and 1.8 times higher than those over anatase TiO2 and commercial TiO2 for NH3 oxidation under full spectrum irradiation. Meanwhile, surface modification of Ag can simultaneously enhance visible light absorption (generating localized surface plasmon resonance effect) and charge separation efficiency. Therefore, the photocatalytic activity of Ag/AgCl/N-TiO2 is further improved. Furthermore, the presence of N and Ag also enhances the selectivity of N2 product owing to the change of reaction pathway. This work simultaneously regulates photocatalytic conversion efficiency and product selectivity, providing some guidance for developing highly efficient photocatalysts for NH3 elimination.
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Affiliation(s)
- Jiaojiao Guan
- College of Environmental Engineering, Henan University of Technology, Zhengzhou 450001, China
| | - Daorong Li
- College of Environmental Engineering, Henan University of Technology, Zhengzhou 450001, China
| | - Jiahui Feng
- College of Environmental Engineering, Henan University of Technology, Zhengzhou 450001, China
| | - Peng Xu
- CAS Key Laboratory of Standardization and Measurement for Nanotechnology, National Center for Nanoscience and Technology, Beijing 100190, China
| | - Zhaonian Li
- College of Environmental Engineering, Henan University of Technology, Zhengzhou 450001, China
| | - Siqi Ge
- College of Environmental Engineering, Henan University of Technology, Zhengzhou 450001, China
| | - Hongxia Chen
- College of Environmental Engineering, Henan University of Technology, Zhengzhou 450001, China.
| | - Kunfeng Zhang
- College of Environmental Engineering, Henan University of Technology, Zhengzhou 450001, China; Department of Chemistry, Tsinghua University, Beijing 100084, China.
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Huang Y, Jeffrey P, Pidou M. UV/TiO 2 photocatalysis as post-treatment of anaerobic membrane bioreactor effluent for reuse. J Environ Manage 2024; 356:120628. [PMID: 38520856 DOI: 10.1016/j.jenvman.2024.120628] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 10/16/2023] [Revised: 02/05/2024] [Accepted: 03/10/2024] [Indexed: 03/25/2024]
Abstract
Advanced oxidation processes have been widely applied as a post-treatment solution to remove residual organic compounds in water reuse schemes. However, UV/TiO2 photocatalysis, which provides a sustainable option with no continuous chemical addition, has very rarely been studied to treat anaerobically treated effluents. In the current study, the removal of organics and nutrients from an anaerobic membrane bioreactor (AnMBR) effluent is evaluated during adsorption and photocatalysis processes under various conditions of TiO2 dose and UV intensity and compared to the effluent from an aerobic membrane bioreactor (AeMBR). The sequence for preferential adsorption on TiO2 was found to be phosphorus, inorganic carbon and then ammonia/organic carbon were found. The competing effect between the organics and nutrients, along with the low UV transmission efficiency caused by the need for high doses of TiO2, ultimately compromise the organic removal efficiency in the AnMBR permeate. TiO2 dosage was found to have a greater impact than UV intensity on improving the overall removal performance as nutrients are competing for the adsorption site but are not photodegraded. Under the same operational condition, the UV/TiO2 photocatalysis displayed a higher removal efficiency of organic matter and phosphorus in the AeMBR effluent due to a lower initial organics concentration and absence of ammonia as compared to the AnMBR effluent.
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Affiliation(s)
- Yu Huang
- Cranfield Water Science Institute, Cranfield University, Cranfield, MK430AL, United Kingdom
| | - Paul Jeffrey
- Cranfield Water Science Institute, Cranfield University, Cranfield, MK430AL, United Kingdom
| | - Marc Pidou
- Cranfield Water Science Institute, Cranfield University, Cranfield, MK430AL, United Kingdom.
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Olvera-Vargas H, Selvam S, Veer R, García-Rodríguez O, Mutnuri S, Lefebvre O. A sustainable activated carbon fiber/TiO 2 cathode for the photoelectro-Fenton treatment of pharmaceutical pollutant enalapril. Chemosphere 2024; 353:141492. [PMID: 38387665 DOI: 10.1016/j.chemosphere.2024.141492] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 11/25/2023] [Revised: 02/15/2024] [Accepted: 02/16/2024] [Indexed: 02/24/2024]
Abstract
In this work, a TiO2-decorated electrode was fabricated by dip coating activated carbon fibers (ACF) with TiO2, which were then used as a cathode for the photoelectro-Fenton (PEF) treatment of the pharmaceutical enalapril, an angiotensin-converting enzyme inhibitor that has been detected in several waterways. The TiO2 coating was found to principally improve the electrocatalytic properties of ACF for H2O2 production via the 2-e- O2 reduction, in turn increasing enalapril degradation by PEF. The effect of the current density on the mineralization of enalapril was evaluated and the highest TOC removal yield (80.5% in 3 h) was obtained at 8.33 mA cm-2, in the presence of 0.5 mmol L-1 of Fe2+ catalyst. Under those conditions, enalapril was totally removed within the first 10 min of treatment with a rate constant k = 0.472 min-1. In contrast, uncoated ACF only achieved 60% of TOC removal in 3 h at 8.33 mA cm-2. A degradation pathway for enalapril mineralization is proposed, based on the degradation by-products identified during treatment. Overall, the results demonstrate the promises of TiO2 cathodes for PEF, a strategy that has often been overlooked in favor of photoelectrocatalysis (PEC) based on TiO2-modified photoanodes.
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Affiliation(s)
- Hugo Olvera-Vargas
- Centre for Water Research, Department of Civil and Environmental Engineering, National University of Singapore, 1 Engineering Drive 2, Singapore, 117576, Singapore; Instituto de Energías Renovables, Universidad Nacional Autónoma de México (IER-UNAM), Priv. Xochicalco S/N, Col. Centro, Temixco, Morelos, 62580, Mexico.
| | - Suthan Selvam
- Centre for Water Research, Department of Civil and Environmental Engineering, National University of Singapore, 1 Engineering Drive 2, Singapore, 117576, Singapore
| | - Rishikesh Veer
- Water Sanitation and Hygiene Laboratory, BITS Pilani, KK Birla Goa Campus, NH 17 B, Zuarinagar, Goa, 403726, India
| | - Orlando García-Rodríguez
- Centre for Water Research, Department of Civil and Environmental Engineering, National University of Singapore, 1 Engineering Drive 2, Singapore, 117576, Singapore; NUS Environmental Research Institute, National University of Singapore, #02-03, T-Lab Building 5A Engineering Drive 1, 117411, Singapore
| | - Srikanth Mutnuri
- Water Sanitation and Hygiene Laboratory, BITS Pilani, KK Birla Goa Campus, NH 17 B, Zuarinagar, Goa, 403726, India
| | - Olivier Lefebvre
- Centre for Water Research, Department of Civil and Environmental Engineering, National University of Singapore, 1 Engineering Drive 2, Singapore, 117576, Singapore; NUS Environmental Research Institute, National University of Singapore, #02-03, T-Lab Building 5A Engineering Drive 1, 117411, Singapore.
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K C A, Rao CS, Nair V. Combination of ensemble machine learning models in photocatalytic studies using nano TiO 2 - Lignin based biochar. Chemosphere 2024; 352:141326. [PMID: 38301840 DOI: 10.1016/j.chemosphere.2024.141326] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 06/25/2023] [Revised: 12/08/2023] [Accepted: 01/27/2024] [Indexed: 02/03/2024]
Abstract
Synergizing photocatalytic reactions with machine learning methods can effectively optimize and automate the remediation of pollutants. In this work, commercial Degussa TiO2 nanoparticles and lignin based biochar (LB) where used to prepare TiO2: lignin based biochar (TLB) composites using ultrasound-assisted co-precipitation method. The photocatalytic property of the TLB composites where studied by conducting the photocatalytic degradation of a Basic blue 41 (BB41) dye. The influence of calcination temperature, T:LB compositions, catalyst dosage, initial dye pH, initial dye concentration, and illumination time on photocatalytic dye degradation were experimentally studied. The degradation efficiency of 96.72 % was obtained under optimized conditions for the photocatalyst calcined at 500 °C containing a 1:1 wt percentage of TiO2 and LB. The experimental data was further used to predict the photocatalytic degradation efficiency using Gradient Tree Boosting (GTB) and Extra Trees (ET) models. The GTB model gave the highest prediction accuracy of 94 %. The permutation variable importance revealed catalyst dosage and dye concentration as the most influential parameters in the prediction of the photocatalytic dye degradation efficiency.
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Affiliation(s)
- Abhayasimha K C
- Department of Chemical Engineering, National Institute of Technology Karnataka (NITK), Surathkal, Mangalore, Karnataka, 575025, India
| | - Chinta Sankar Rao
- Department of Chemical Engineering, National Institute of Technology Karnataka (NITK), Surathkal, Mangalore, Karnataka, 575025, India
| | - Vaishakh Nair
- Department of Chemical Engineering, National Institute of Technology Karnataka (NITK), Surathkal, Mangalore, Karnataka, 575025, India.
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Guo J, Fan Y, Dong X, Zeng H, Ma X, Fu Y. Study on preparation of UV-CDs/Zeolite-4A/TiO 2 composite photocatalyst coupled with ultraviolet-irradiation and their application of photocatalytic degradation of dyes. J Environ Manage 2024; 354:120342. [PMID: 38382431 DOI: 10.1016/j.jenvman.2024.120342] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 10/11/2023] [Revised: 01/11/2024] [Accepted: 02/08/2024] [Indexed: 02/23/2024]
Abstract
In this work, ultraviolet irradiation was employed to assist in the preparation of a novel photocatalyst composite in the form of carbon dots/zeolite-4A/TiO2, using coal tailings as the source of silicon-aluminum and carbon. The composite was designed for the degradation of methylene blue under 500 W of UV light irradiation. Zeolite-4A was used as a support for the well-dispersed carbon dots and TiO2 nanoparticles. The as-prepared composites were subjected to thorough characterization, confirming the successful formation of zeolite-4A with a cube structure, along with the loading of TiO2 and coal-based CDs in the composites. The experimental results demonstrated that the UV-CZTs nanocomposites exhibited a remarkable removal efficiency of 90.63% within 90 min for MB. The corresponding rate constant was exceptionally high at 0.0331 min-1, surpassing that of the Dark-CZTs and pure TiO2. This significant enhancement was possibly due to the synergistic effect of adsorption photocatalysis of the UV-CZTs, combined with the excellent electron-accepting capabilities of the coal-based CDs, which led to highly improved charge separation. An investigation of the spent photocatalyst's recyclability revealed that it retained a remarkable 82.94% MB removal efficiency after five consecutive cycles, signifying the stability of the composite. Trapping experiments also elucidated the primary reactive species responsible for MB degradation, which were identified as photo-generated holes and ⸱O2- species. By this process, the hydroxyl radicals generated in the system successfully promoted the transformation of coal tailings to coal-based zeolite and coal-based CDs. Coal-based zeolite served as an excellent carrier of titanium dioxide, which improved its dispersibility. The inhibition of e--h+ recombination of titanium dioxide by introducing coal-based CDs improved the photocatalytic ability of titanium dioxide. Through this study, coal tailings, as a coal processing waste, were transformed into high-value materials, and relevant photocatalytic composite materials could be prepared with broad application prospects.
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Affiliation(s)
- Jiaqi Guo
- College of Mining Engineering, Taiyuan University of Technology, Taiyuan, 030024, Shanxi, China; Department of Chemical and Materials Engineering, University of Alberta, Edmonton, AB, T6G 1H9, Canada
| | - Yuping Fan
- College of Mining Engineering, Taiyuan University of Technology, Taiyuan, 030024, Shanxi, China
| | - Xianshu Dong
- College of Mining Engineering, Taiyuan University of Technology, Taiyuan, 030024, Shanxi, China.
| | - Hongbo Zeng
- Department of Chemical and Materials Engineering, University of Alberta, Edmonton, AB, T6G 1H9, Canada.
| | - Xiaomin Ma
- College of Mining Engineering, Taiyuan University of Technology, Taiyuan, 030024, Shanxi, China
| | - Yuanpeng Fu
- College of Mining Engineering, Taiyuan University of Technology, Taiyuan, 030024, Shanxi, China
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Kuang K, Chen Y, Li Y, Ji Y, Jia N. N-doped TiO 2/Ti 3C 2-driven self-photocatalytic molecularly imprinted ECL sensor for sensitive and steady detection of dexamethasone. Biosens Bioelectron 2024; 247:115914. [PMID: 38091899 DOI: 10.1016/j.bios.2023.115914] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/18/2023] [Revised: 11/15/2023] [Accepted: 12/04/2023] [Indexed: 01/02/2024]
Abstract
The conventional luminol-based electrochemiluminescence (ECL) biosensor suffers from hampered signal stability due to the self-decomposition of the H2O2 co-reactant. Here, we propose an N-doped TiO2/Ti3C2 heterojunction driven self-photocatalytic platform for ECL signal amplification and then combine it with molecular imprinting technology for sensitive and steady detection of dexamethasone (DXM). Unlike traditional cases involving specific catalysts or external electron injection, the initial luminescence of luminol in this new system is utilized as the excitation light of N-doped TiO2/Ti3C2 photocatalyst to promote the conversation of dissolved oxygen to H2O2, supplying more co-reactants to improve ECL of luminol in turn. Thanks to the heterojunction and self-photocatalytic cyclic amplification, this molecularly imprinted ECL sensor exhibits a wide linear range (1.0 × 10-6-1.0 × 101 μg mL-1) and a low detection limit, as well as excellent anti-interference capability, sensitivity, and stability. This work contributes to more reliable and steady detection of DXM and brings new insights into developing exogenous co-reactant-free self-enhancement ECL models for biosensor applications.
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Affiliation(s)
- Kaida Kuang
- The Education Ministry Key Lab of Resource Chemistry, Joint International Research Laboratory of Resource Chemistry, Ministry of Education, Shanghai Frontiers Science Center of Biomimetic Catalysis, Shanghai Key Laboratory of Rare Earth Functional Materials, College of Chemistry and Materials Science, Shanghai Normal University, Shanghai, 200234, China.
| | - Yang Chen
- The Education Ministry Key Lab of Resource Chemistry, Joint International Research Laboratory of Resource Chemistry, Ministry of Education, Shanghai Frontiers Science Center of Biomimetic Catalysis, Shanghai Key Laboratory of Rare Earth Functional Materials, College of Chemistry and Materials Science, Shanghai Normal University, Shanghai, 200234, China.
| | - Ya Li
- The Education Ministry Key Lab of Resource Chemistry, Joint International Research Laboratory of Resource Chemistry, Ministry of Education, Shanghai Frontiers Science Center of Biomimetic Catalysis, Shanghai Key Laboratory of Rare Earth Functional Materials, College of Chemistry and Materials Science, Shanghai Normal University, Shanghai, 200234, China.
| | - Yu Ji
- The Education Ministry Key Lab of Resource Chemistry, Joint International Research Laboratory of Resource Chemistry, Ministry of Education, Shanghai Frontiers Science Center of Biomimetic Catalysis, Shanghai Key Laboratory of Rare Earth Functional Materials, College of Chemistry and Materials Science, Shanghai Normal University, Shanghai, 200234, China.
| | - Nengqin Jia
- The Education Ministry Key Lab of Resource Chemistry, Joint International Research Laboratory of Resource Chemistry, Ministry of Education, Shanghai Frontiers Science Center of Biomimetic Catalysis, Shanghai Key Laboratory of Rare Earth Functional Materials, College of Chemistry and Materials Science, Shanghai Normal University, Shanghai, 200234, China.
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10
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Noh J, Jekal S, Kim J, Kim HY, Chu YR, Kim CG, Oh WC, Song S, Sub Sim H, Yoon CM. Vivid-Colored Electrorheological fluids with simultaneous enhancements in color clarity and Electro-Responsivity. J Colloid Interface Sci 2024; 657:373-383. [PMID: 38043239 DOI: 10.1016/j.jcis.2023.11.183] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/12/2023] [Revised: 11/16/2023] [Accepted: 11/28/2023] [Indexed: 12/05/2023]
Abstract
HYPOTHESIS Surface modification of dielectric materials changes the dipole-dipole interactions under electric fields, thereby controlling the electrorheological (ER) response. The introduction of metal oxides onto mica templates and further coating of dyes is expected to simultaneously improve the color clarity and ER performance. EXPERIMENTS Dye-coated TiO2 platelets on mica are synthesized for high-performance colorful ER fluids. A sol-gel method is utilized to grow TiO2 on mica to prepare precursor light-colored mica/TiO2 materials, which are coated with appropriate dyes to enhance the vividness as determined by the Commission Internationale de clairage L*a*b* color system. The color expression and color clarity improvement are explained via the light interference effect and the presence of chromophores. FINDINGS The uniform TiO2 layers can be obtained under low pH conditions with controlled nucleation kinetics. The addition of dyes to TiO2 increases the surface area and porosity of ER materials and introduces heteroatoms that act as positive factors. In practical ER applications, dye-coated TiO2-based ER fluids exhibit higher ER performances compared with the corresponding light-colored TiO2-based ER fluids. The vivid-colored ER fluids could provide an easy selection for a wide range of rheological systems requiring a specific magnitude of stress by confirming the color.
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Affiliation(s)
- Jungchul Noh
- McKetta Department of Chemical Engineering and Texas Material Institute, The University of Texas at Austin, Austin, TX 78712, USA.
| | - Suk Jekal
- Department of Chemical and Biological Engineering, Hanbat National University, 125 Dongseo-daero, Yuseong-gu, Daejon 34158, Korea.
| | - Jiwon Kim
- Department of Chemical and Biological Engineering, Hanbat National University, 125 Dongseo-daero, Yuseong-gu, Daejon 34158, Korea.
| | - Ha-Yeong Kim
- Department of Chemical and Biological Engineering, Hanbat National University, 125 Dongseo-daero, Yuseong-gu, Daejon 34158, Korea.
| | - Yeon-Ryong Chu
- Department of Chemical and Biological Engineering, Hanbat National University, 125 Dongseo-daero, Yuseong-gu, Daejon 34158, Korea.
| | - Chan-Gyo Kim
- Department of Chemical and Biological Engineering, Hanbat National University, 125 Dongseo-daero, Yuseong-gu, Daejon 34158, Korea.
| | - Won-Chun Oh
- Department of Advanced Materials Science & Engineering, Hanseo University, 46 Hanseo 1-ro, Seosan-si, Chungnam 356-706, Korea.
| | - Seulki Song
- Department of Chemical Engineering and Applied Chemistry, Chungnam National University, 99 Daehak-ro, Yuseong-gu, Daejeon 34134, Korea.
| | - Hyung Sub Sim
- Department of Aerospace Engineering, Sejong University, 209 Neungdong-ro, Gwangjin-gu, Seoul 05006, Korea.
| | - Chang-Min Yoon
- Department of Chemical and Biological Engineering, Hanbat National University, 125 Dongseo-daero, Yuseong-gu, Daejon 34158, Korea.
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11
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Chandra A, Ghosh S, Sarkar R, Sarkar S, Chattopadhyay KK. TiO 2 nanorods decorated Si nanowire hierarchical structures for UV light activated photocatalytic application. Chemosphere 2024; 352:141249. [PMID: 38266878 DOI: 10.1016/j.chemosphere.2024.141249] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 08/31/2023] [Revised: 01/09/2024] [Accepted: 01/16/2024] [Indexed: 01/26/2024]
Abstract
Water remediation techniques like photolysis have recently piqued the interest of many researchers due to water contamination resulting from heavy industrialization and urbanization. In the current work, as-synthesized TiO2 nanorod decorated vertically aligned silicon nanowire (SiNW) leads to a hierarchical morphological structure formation. The photocatalytic nature of the fabricated SiNW/TiO2 nanoheterojunction is examined by the dye degradation of textile pollutants like methylene blue (MB), rhodamine B (RhB), and eosin B (EB). The catalytic dye degradation investigations revealed that 4 h hydrothermal synthesis of TiO2 on the surface of SiNW (ST4) exhibited excellent catalytic behaviour. In the presence of H2O2 and UV irradiation, the ST4 nanoheterostructure can degrade 98.89% of the model pollutant methylene blue (MB) in 15 min, demonstrating remarkable photocatalytic performance. The direct Z-scheme heterojunction exhibited by the SiNW/TiO2 structure facilitates a more efficient charge transfer mechanism with higher reducing and oxidizing ability leading to enhanced photocatalytic behaviour. The degradation pathway examined by LC-MS studies demonstrated the complete breakdown of the organic MB dye molecules ultimately mineralizing into CO2, H2O, and other inorganic substances. The photocatalyst ST4 exhibited excellent reusability and stability after multiple cycles of dye degradation enabling its use in practical water purification purposes.
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Affiliation(s)
- Ankita Chandra
- School of Materials Science and Nanotechnology, Jadavpur University, Kolkata, 700032, India
| | - Shrabani Ghosh
- School of Materials Science and Nanotechnology, Jadavpur University, Kolkata, 700032, India
| | - Ratna Sarkar
- Thin film and Nano Science Laboratory, Department of Physics, Jadavpur University, Kolkata, 700032, India
| | - Sourav Sarkar
- School of Materials Science and Nanotechnology, Jadavpur University, Kolkata, 700032, India
| | - K K Chattopadhyay
- School of Materials Science and Nanotechnology, Jadavpur University, Kolkata, 700032, India; Thin film and Nano Science Laboratory, Department of Physics, Jadavpur University, Kolkata, 700032, India.
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12
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Zhang Z, Zhang L, Huang Z, Xu Y, Zhao Q, Wang H, Shi M, Li X, Jiang K, Wu D. "Floating Catalytic Foam" with prominent heat-induced convection for the effective photocatalytic removal of antibiotics. J Hazard Mater 2024; 463:132879. [PMID: 37944238 DOI: 10.1016/j.jhazmat.2023.132879] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 05/28/2023] [Revised: 10/23/2023] [Accepted: 10/26/2023] [Indexed: 11/12/2023]
Abstract
Immobilized photocatalysts represent a promising candidate for the wastewater treatments due to their good reusability, high stability and low eco-risk. Mass transfer within the immobilized catalytic bed is a crucial process that determines the contacting, adsorption, and degradation kinetics in the photodegradation. In this study, a floating catalytic foam (FCF) with a prominent pumping effect was designed to promote mass transfer. The polyurethane foam immobilized with rGO/TiO2/ultrathin-g-C3N4 photocatalyst (PRTCN) was prepared by a simple dip-coating and Uv-light aging process. It was found that the hydrophilic-hydrophobic interfaces could not only contribute to the floating of the catalyst but also establish a temperature gradient across the floating immobilized catalyst. In addition, the temperature gradient induced convection could serve as a built-in pump to effectively promote the diffusion and adsorption of target antibiotic molecules during the photocatalytic process. Therefore, the PRTCN demonstrated a high photodegradation and mineralization efficiency with excellent reusability and anti-interference capability. Moreover, the photodegradation mechanism and the intermediates' toxicity of norfloxacin were detailly investigated by ultra-high resolution electrospray time-of-flight mass spectrometry, density functional theory simulation and ECOSAR estimation. This work proposed a facile and sustainable strategy to enhance the mass transfer problem on immobilized photocatalysts, which could promote the application of the immobilized photocatalysts in the real water-treatment scenarios.
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Affiliation(s)
- Zhe Zhang
- School of Environment, Henan Normal University, Key Laboratory of Yellow River and Huai River Water Environment and Pollution Control, Ministry of Education, Collaborative Innovation Center of Henan Province for Green Manufacturing of Fine Chemicals, Xinxiang, Henan 453007, China
| | - Lu Zhang
- School of Environment, Henan Normal University, Key Laboratory of Yellow River and Huai River Water Environment and Pollution Control, Ministry of Education, Collaborative Innovation Center of Henan Province for Green Manufacturing of Fine Chemicals, Xinxiang, Henan 453007, China.
| | - Zhihao Huang
- School of Environment, Henan Normal University, Key Laboratory of Yellow River and Huai River Water Environment and Pollution Control, Ministry of Education, Collaborative Innovation Center of Henan Province for Green Manufacturing of Fine Chemicals, Xinxiang, Henan 453007, China
| | - Yuxin Xu
- School of Environment, Henan Normal University, Key Laboratory of Yellow River and Huai River Water Environment and Pollution Control, Ministry of Education, Collaborative Innovation Center of Henan Province for Green Manufacturing of Fine Chemicals, Xinxiang, Henan 453007, China
| | - Qingqing Zhao
- School of Environment, Henan Normal University, Key Laboratory of Yellow River and Huai River Water Environment and Pollution Control, Ministry of Education, Collaborative Innovation Center of Henan Province for Green Manufacturing of Fine Chemicals, Xinxiang, Henan 453007, China
| | - Hongju Wang
- School of Environment, Henan Normal University, Key Laboratory of Yellow River and Huai River Water Environment and Pollution Control, Ministry of Education, Collaborative Innovation Center of Henan Province for Green Manufacturing of Fine Chemicals, Xinxiang, Henan 453007, China
| | - Meiqing Shi
- School of Metallurgy and Environment, Central South University, Changsha, Hunan 410083, China.
| | - Xiangnan Li
- School of Chemistry and Chemical Engineering, Henan Normal University, Collaborative Innovation Center of Henan Province for Green Manufacturing of Fine Chemicals, Xinxiang, Henan 453007, China
| | - Kai Jiang
- School of Environment, Henan Normal University, Key Laboratory of Yellow River and Huai River Water Environment and Pollution Control, Ministry of Education, Collaborative Innovation Center of Henan Province for Green Manufacturing of Fine Chemicals, Xinxiang, Henan 453007, China
| | - Dapeng Wu
- School of Environment, Henan Normal University, Key Laboratory of Yellow River and Huai River Water Environment and Pollution Control, Ministry of Education, Collaborative Innovation Center of Henan Province for Green Manufacturing of Fine Chemicals, Xinxiang, Henan 453007, China; School of Chemistry and Chemical Engineering, Henan Normal University, Collaborative Innovation Center of Henan Province for Green Manufacturing of Fine Chemicals, Xinxiang, Henan 453007, China.
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13
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Song X, Guo W, Zhu Z, Han G, Cheng W. Preparation of uniform lignin/titanium dioxide nanoparticles by confined assembly: A multifunctional nanofiller for a waterborne polyurethane wood coating. Int J Biol Macromol 2024; 258:128827. [PMID: 38134989 DOI: 10.1016/j.ijbiomac.2023.128827] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/16/2023] [Revised: 11/12/2023] [Accepted: 12/13/2023] [Indexed: 12/24/2023]
Abstract
We report a facile synthesis for lignin/titanium dioxide (TiO2) nanoparticles (LT NPs) at room temperature by confining assembly of lignin macromolecules. The LT NPs had a uniform nanosize distribution (average diameter ∼ 68 nm) and were directly employed as multifunctional nanofillers to reinforce a waterborne polyurethane wood coating (WBC). X-ray diffraction, Fourier-transform infrared spectroscopy, and X-ray photoelectron spectroscopy revealed the mechanism by which formed TiO2 confined lignin assembly. The LT NPs considerably increased the tensile strength of a WBC film from 16.3 MPa to 28.1 MPa. The WBC-LT NPs exhibited excellent ultraviolet (UV) A and UVB blocking performances of 87 % and 98 %, respectively, while maintaining 94 % transmittance in the visible region. Incorporating LT NPs into the WBC enhanced the coating performance (the hardness, adhesion, and abrasion resistance) on wood substrates. A quantitative color and texture analysis revealed that the LT NPs increased the decorativeness of actual wooden products. After nearly 1800 h of UV irradiation, wood coated with the WBC-LT NPs exhibited good color stability, where the original color remained unchanged or even became brighter. In this study, value-added valorization of lignin is enabled by using organic-inorganic nanofillers and insights are gained into developing multifunctional WBCs.
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Affiliation(s)
- Xiaoxue Song
- Key Laboratory of Bio-based Material Science and Technology (Northeast Forestry University), Ministry of Education, Harbin 150040, PR China
| | - Wenxiao Guo
- Key Laboratory of Bio-based Material Science and Technology (Northeast Forestry University), Ministry of Education, Harbin 150040, PR China
| | - Zhipeng Zhu
- Key Laboratory of Bio-based Material Science and Technology (Northeast Forestry University), Ministry of Education, Harbin 150040, PR China
| | - Guangping Han
- Key Laboratory of Bio-based Material Science and Technology (Northeast Forestry University), Ministry of Education, Harbin 150040, PR China
| | - Wanli Cheng
- Key Laboratory of Bio-based Material Science and Technology (Northeast Forestry University), Ministry of Education, Harbin 150040, PR China.
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14
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Zhao ZA, Mao J, Lu C, Yang S, Qian Q, Chen Q, Xue H, Sun X, Yang MQ. Design and fabrication of self-suspending aluminum-plastic/semiconductor photocatalyst devices for solar energy conversion. J Environ Sci (China) 2024; 136:615-625. [PMID: 37923470 DOI: 10.1016/j.jes.2023.01.026] [Citation(s) in RCA: 1] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/06/2022] [Revised: 01/19/2023] [Accepted: 01/19/2023] [Indexed: 11/07/2023]
Abstract
The design and synthesis of self-suspending photocatalyst device with easy recyclability is important for practical application. Here, this work utilizes aluminum-plastic package waste as raw material to prepare an aluminum-plastic supported TiO2 (AP-TiO2) photocatalyst device through 3D printing design and surface deposition method. A series of characterizations were carried out to explore the structure, morphology and performance of the AP-TiO2 device. Under UV light illumination, the AP-TiO2-50 efficiently degrade 93.6% tetracycline hydrochloride (THC) after 4 hr, which increases by 8.3% compared with that of TiO2 powder suspension system with the same catalyst amount. Based on it, AP-ZnO, AP-CdS, AP-g-C3N4 and AP-Pt-TiO2 are also fabricated, and applied in photocatalytic degradation and hydrogen evolution, which all exhibit higher photoactivities than powder suspension systems. This work provides a new avenue for the fabrication of advanced recyclable photocatalyst device. Moreover, the work offers a novel sight for the high-value utilization of aluminum-plastic package waste, which has positive implications for environmental protection.
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Affiliation(s)
- Zhi-Ang Zhao
- College of Environmental and Resource Sciences, College of Carbon Neutral Modern Industry, Fujian Key Laboratory of Pollution Control and Resource Reuse, Fujian Normal University, Fuzhou 350007, China
| | - Jingyun Mao
- College of Environmental and Resource Sciences, College of Carbon Neutral Modern Industry, Fujian Key Laboratory of Pollution Control and Resource Reuse, Fujian Normal University, Fuzhou 350007, China
| | - Chengjing Lu
- College of Environmental and Resource Sciences, College of Carbon Neutral Modern Industry, Fujian Key Laboratory of Pollution Control and Resource Reuse, Fujian Normal University, Fuzhou 350007, China
| | - Shuangqiao Yang
- State Key Laboratory of Polymer Materials Engineering, Polymer Research Institute of Sichuan University, Chengdu 610065, China
| | - Qingrong Qian
- College of Environmental and Resource Sciences, College of Carbon Neutral Modern Industry, Fujian Key Laboratory of Pollution Control and Resource Reuse, Fujian Normal University, Fuzhou 350007, China
| | - Qinghua Chen
- College of Environmental and Resource Sciences, College of Carbon Neutral Modern Industry, Fujian Key Laboratory of Pollution Control and Resource Reuse, Fujian Normal University, Fuzhou 350007, China
| | - Hun Xue
- College of Environmental and Resource Sciences, College of Carbon Neutral Modern Industry, Fujian Key Laboratory of Pollution Control and Resource Reuse, Fujian Normal University, Fuzhou 350007, China.
| | - Xiaoli Sun
- College of Environmental and Resource Sciences, College of Carbon Neutral Modern Industry, Fujian Key Laboratory of Pollution Control and Resource Reuse, Fujian Normal University, Fuzhou 350007, China
| | - Min-Quan Yang
- College of Environmental and Resource Sciences, College of Carbon Neutral Modern Industry, Fujian Key Laboratory of Pollution Control and Resource Reuse, Fujian Normal University, Fuzhou 350007, China.
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15
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Qian W, Chen CC, Huang Y, Zhu X. Exposure concentration ratios and biological responses play a critical role in determining the joint toxicity of TiO 2 nanoparticles and As(V) to the organism: The case study in marine algae Phaeodactylum tricornutum. Sci Total Environ 2024; 909:168508. [PMID: 37977401 DOI: 10.1016/j.scitotenv.2023.168508] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 08/23/2023] [Revised: 10/30/2023] [Accepted: 11/09/2023] [Indexed: 11/19/2023]
Abstract
Environmental risks of manufactured nanomaterials (MNMs) have been widely investigated while the understanding for joint toxicity mechanism of MNMs with other contaminants is still limited. This limitation may be attributed to variations in the concentration ratios of MNMs and co-existing contaminants in the real environment. To better assess the joint toxicity and clarify its underlying mechanisms, this study exposed Phaeodactylum tricornutum to different concentration combinations of nano-sized titanium dioxide (nTiO2) and As(V) at toxic unit (TU) ratios of 1:4,1:1, and 4:1. The results demonstrated that the joint toxicity modes of nTiO2 and As(V) varied with the TU ratios exhibiting synergism for 1:4, partially addition for 1:1, and antagonism for 4:1. Specifically, at low TU ratio of 1:4, the adsorption of As(V) by nTiO2 together with the subsequent internalization of nTiO2 promoted a significant enrichment of As in algae. Simultaneously, the up-regulation of pst (phosphate transporter) genes in charge of the As(V) transport molecular further exacerbated the enrichment of inorganic As in algae, while the down-regulation of ArsM (arsenite S-adenosylmethionine methyltransferases) genes in charge of the As metabolism inhibited As biotransformation from toxic inorganic to nontoxic organic, causing the aggravated accumulation of toxic inorganic As in algae. At higher TU ratios of 1:1 and 4:1, the accumulation of As decreased in algae due to the higher sedimentation of nTiO2 and thus the lower internalization of As-adsorbed nTiO2, as well as the down-regulation of pst genes restricting the transportation of As(V) into algal cells, which jointly accelerated the As biotransformation from toxic inorganic to nontoxic organic. Our results suggest that more attention should be paid to exposure concentration ratios of MNMs and co-existing contaminants and biological responses including bioavailability, bioaccumulation, biotransformation, which would play a critical role in determining the joint toxicity to the organism.
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Affiliation(s)
- Wei Qian
- Key Laboratory of Agro-Forestry Environmental Processes and Ecological Regulation of Hainan Province, Hainan University, Haikou 570228, China; School of Ecology and Environment, Hainan University, Haikou 570208, China; Shenzhen International Graduate school, Tsinghua University, Shenzhen 518055, China
| | - Ciara Chun Chen
- College of Chemistry and Chemical Engineering, Shantou University, Shantou 515063, China
| | - Yuxiong Huang
- Shenzhen International Graduate school, Tsinghua University, Shenzhen 518055, China
| | - Xiaoshan Zhu
- School of Ecology and Environment, Hainan University, Haikou 570208, China; Shenzhen International Graduate school, Tsinghua University, Shenzhen 518055, China.
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16
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Ntelane TS, Feleni U, Mthombeni NH, Kuvarega AT. CuFeS 2 supported on dendritic mesoporous silica-titania for persulfate-assisted degradation of sulfamethoxazole under visible light. J Colloid Interface Sci 2024; 654:660-676. [PMID: 37864871 DOI: 10.1016/j.jcis.2023.10.077] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/14/2023] [Revised: 10/11/2023] [Accepted: 10/16/2023] [Indexed: 10/23/2023]
Abstract
Sulfamethoxazole (SMX) is a prevalent sulfonamide antibiotic found in the environment, and it has a variety of detrimental effects on environmental sustainability and water safety. Recently, the combination of photocatalysis and sulfate radical-based advanced oxidation processes (SR-AOPs) has attracted a lot of interest as a viable technique for degradation of refractory pollutants. In this study, a visible light active CuFeS2 supported on dendritic mesoporous silica-titania (CuFeS2-DMST) photocatalyst was synthesized to improve the ability of TiO2 to activate persulfate (PS) by introducing CuFeS2 (Fe2+/Fe3+, Cu+/Cu2+ redox cycles). The CuFeS2-DMST/PS/Vis system demonstrated superior SMX degradation efficiency (88.9%, 0.0146 min-1) than TiO2 because of reduced e-/h+ recombination, excellent charge separation and mobility, and a greater surface area than TiO2. Furthermore, after four consecutive photocatalytic cycles, the system demonstrated moderate stability. From chemical quenching tests, O2●-, h+, 1O2, SO4●- and ●OH were found to be the main reactive oxidizing species. The formed intermediates during the degradation process were identified, and degradation mechanisms were proposed. This study proposes a viable technique for activating PS using a low-cost, stable, and high-surface-area TiO2-based photocatalyst, and this concept can be applied to design photocatalysts for water treatment.
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Affiliation(s)
- Tau S Ntelane
- Institute for Nanotechnology and Water Sustainability, College of Science, Engineering and Technology, University of South Africa, Florida, 1710 Johannesburg, South Africa; Department of Chemical Engineering, College of Science, Engineering and Technology, University of South Africa, Florida, 1710, Johannesburg, South Africa
| | - Usisipho Feleni
- Institute for Nanotechnology and Water Sustainability, College of Science, Engineering and Technology, University of South Africa, Florida, 1710 Johannesburg, South Africa
| | - Nomcebo H Mthombeni
- Department of Chemical Engineering, College of Science, Engineering and Technology, University of South Africa, Florida, 1710, Johannesburg, South Africa; Department of Chemical Engineering, Faculty of Engineering and the Built Environment, Durban University of Technology, P.O. Box 1334, Durban 4000, South Africa
| | - Alex T Kuvarega
- Institute for Nanotechnology and Water Sustainability, College of Science, Engineering and Technology, University of South Africa, Florida, 1710 Johannesburg, South Africa.
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17
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Wang X, Wang J, Liu S, Dou M, Gao B. Sterilization mechanism and nanotoxicity of visible light-driven defective carbon nitride and UV-excited TiO 2. J Hazard Mater 2024; 461:132109. [PMID: 37734307 DOI: 10.1016/j.jhazmat.2023.132109] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 03/01/2023] [Revised: 07/05/2023] [Accepted: 07/19/2023] [Indexed: 09/23/2023]
Abstract
The sterilization effect of photocatalysis and biotoxicity of nanomaterial catalysts have attracted high attention. In this study, the novel visible-driven defective carbon nitride (VL/DCN) system exhibits non-photoreactivation, non-toxic superior performance compared with traditional ultraviolet radiation (UV) and UV/titanium dioxide (UV/TiO2). The inactivation of antibiotic-resistant bacteria (ARB) by novel VL/DCN still reached 7 log within 4 h, and the reduction rates of aminoglycoside gene strB and tetracycline gene tetA exceeded 0.8 log and 1.2 log, respectively. Further, the sterilization mechanism and nanotoxicity were contrastively and systematically analyzed among above three systems as following. Firstly, in the VL/DCN system, reactive oxygen species (ROSs) generated from photocatalytic process leads to the destruction of cell membranes, resulting in dissolving out of potassium ion (K+), protein and cell membrane ATP content. Thus, resistant bacteria were completely inactivated and photoreactivation disappears. In contrast, the UV only acted on bacterial DNA and existed the light resurrection. The UV/TiO2 strictly dependent on ultraviolet light and can be used in limited scenarios. Secondly, in cell viability analysis by human lung cell line BEAS-2B experiments, the 10% inhibition of cell growth when DCN was 600 mg/L much lower than 28% inhibition of cell growth when TiO2 was only 200 mg/L. The expression of pro-inflammatory cytokines ((Interleukin, IL) -6), IL-8, IL-1β) under the effect of DCN was 1.5-fold, 5.7-fold and 3.7-fold lower than TiO2, respectively. Meanwhile, DCN induced cells to produce less ROSs, malondialdehyde (MDA), and more superoxide dismutase (SOD). Above results demonstrated that DCN has far lower cytotoxicity than TiO2. This study provides theoretical support for the application of photocatalytic sterilization technology and the exploration of the toxicity of nanomaterials.
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Affiliation(s)
- Xiaoyue Wang
- Beijing Key Laboratory of Aqueous Typical Pollutants Control and Water Quality Safeguard, School of Environment, Beijing Jiaotong University, Haidian District, Beijing 100044, China
| | - Jin Wang
- Beijing Key Laboratory of Aqueous Typical Pollutants Control and Water Quality Safeguard, School of Environment, Beijing Jiaotong University, Haidian District, Beijing 100044, China.
| | - Shanjun Liu
- Jinan Environmental Research Academy, Jinan 250102, China
| | - Mengmeng Dou
- Beijing Key Laboratory of Aqueous Typical Pollutants Control and Water Quality Safeguard, School of Environment, Beijing Jiaotong University, Haidian District, Beijing 100044, China
| | - Boru Gao
- China International Engineering Consulting Corporation, Beijing 100048, China
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18
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de Araujo GF, do Espírito Santo DG, Júnior SFS, Correia FV, Saggioro EM. Toxicological approaches as tool to assess the effects of a mixture of photocatalytic degradation products originated from the unregulated neonicotinoid acetamiprid employing a terrestrial organism (Eisenia andrei). Sci Total Environ 2024; 906:167271. [PMID: 37777123 DOI: 10.1016/j.scitotenv.2023.167271] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 04/24/2023] [Revised: 08/25/2023] [Accepted: 09/20/2023] [Indexed: 10/02/2023]
Abstract
Acetamiprid (ACT) has been detected in several water sources in Latin America. The presence of its degradation products in the environment is not negligible and transformation products (TPs) significantly contribute to environmental health risks. Although advanced oxidative processes are promising for the treatment of this neocotinoid, effects of these are still unknown. In this context, the effects of a mixture of photocatalytic degradation products resulting from an ACT treatment for 90 min employing TiO2/UV on cytotoxicity and oxidative stress parameters in Eisenia andrei earthworms in acute and chronic experiments using typical Latin American soil were assessed. Acute contact tests were performed (72 h) using a filter paper moistened with an ACT solution and a chronic test was performed using Oxisoil (200 g) moistened with an ACT solution for 45 days. Catalase (CAT) and glutathione-S-transferase (GST) activities, reduced glutathione (GSH) levels and cytotoxicity (cellular eleocyte and amoebocyte assessments) were investigated. Over 75 % of ACT was degraded within the first 15 min of treatment, with levels below the limit of detection after 60 min. The acute test revealed greater cytotoxic effects associated with the effluents treated for T0 and T15 min, with decreased cell density noted after 48 h of exposure, in addition to CAT induction (in all treatments) and GST induction following T0, T15 and T90 min exposures. Concerning the chronic assay, decreases in cell density (T0, T15, T60 and T90 min) and viability (T0, T60 and T90 min) were observed after 45 days, in addition to induced CAT activity following T0, T15 and T60 exposures and GST induction following the T60 min exposure. Reduced glutathione levels were unaltered, comprising the least sensitive biomarker among the investigated parameters to the treated effluent exposures. The mixture of ACT degradation products can cause toxic effects to non-target organisms, despite parent compound degradation, alerting for the need for ecotoxicological tests to prove decreased effluent toxicity, in addition to the improvement of degradation techniques.
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Affiliation(s)
- Gabriel Farias de Araujo
- Programa de Pós-Graduação em Saúde Pública e Meio Ambiente, Sergio Arouca National School of Public Health, Oswaldo Cruz Foundation, Av. Leopoldo Bulhões 1480, 21041-210 Rio de Janeiro, RJ, Brazil
| | - Danielli Gundes do Espírito Santo
- Programa de Pós-Graduação em Saúde Pública e Meio Ambiente, Sergio Arouca National School of Public Health, Oswaldo Cruz Foundation, Av. Leopoldo Bulhões 1480, 21041-210 Rio de Janeiro, RJ, Brazil
| | - Sidney Fernandes Sales Júnior
- Programa de Pós-Graduação em Saúde Pública e Meio Ambiente, Sergio Arouca National School of Public Health, Oswaldo Cruz Foundation, Av. Leopoldo Bulhões 1480, 21041-210 Rio de Janeiro, RJ, Brazil
| | - Fábio Veríssimo Correia
- Programa de Pós-Graduação em Saúde Pública e Meio Ambiente, Sergio Arouca National School of Public Health, Oswaldo Cruz Foundation, Av. Leopoldo Bulhões 1480, 21041-210 Rio de Janeiro, RJ, Brazil; UNIRIO, Departamento de Ciências Naturais, Av. Pasteur, 458, Urca, 22290-20 Rio de Janeiro, Brazil; Laboratório de Avaliação e Promoção da Saúde Ambiental, Instituto Oswaldo Cruz, Fundação Oswaldo Cruz, Av. Brasil, 4.365, Manguinhos, 21040-360 Rio de Janeiro, Brazil
| | - Enrico Mendes Saggioro
- Programa de Pós-Graduação em Saúde Pública e Meio Ambiente, Sergio Arouca National School of Public Health, Oswaldo Cruz Foundation, Av. Leopoldo Bulhões 1480, 21041-210 Rio de Janeiro, RJ, Brazil; Laboratório de Avaliação e Promoção da Saúde Ambiental, Instituto Oswaldo Cruz, Fundação Oswaldo Cruz, Av. Brasil, 4.365, Manguinhos, 21040-360 Rio de Janeiro, Brazil.
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19
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Bharathi P, Harish S, Shimomura M, Mohan MK, Archana J, Navaneethan M. Ultrasensitive and reversible NO 2 gas sensor based on SnS 2/TiO 2 heterostructures for room temperature applications. Chemosphere 2024; 346:140486. [PMID: 37875216 DOI: 10.1016/j.chemosphere.2023.140486] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 04/12/2023] [Revised: 10/02/2023] [Accepted: 10/17/2023] [Indexed: 10/26/2023]
Abstract
Nitrogen dioxide (NO2) is one of the toxic gases produced by chemical industries, power plants, and vehicles. In this work, we demonstrate an inexpensive sensing platform for NO2 detection at room temperature (RT-32 °C) based on a charge transfer mechanism. Three-dimensional hierarchical SnS2 and SnS2/mesoporous TiO2 nanocomposites were synthesized via the solvothermal method. SnS2/20 wt% mesoporous TiO2 nanocomposites sample showed 245.4% enhanced response compared to pristine SnS2. The fabricated device exhibits excellent selectivity among all other interfering gases with one-month stability. The rapid response and enhanced response achieved were obtained for the minimum concentration of 2 ppm NO2. The formation of heterojunction between SnS2 and mesoporous TiO2 has a synergetic effect, providing more active sites and porous structures for the detection of NO2 gas molecules.
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Affiliation(s)
- P Bharathi
- Functional Materials and Energy Devices Laboratory, Department of Physics and Nanotechnology, SRM Institute of Science and Technology, Kattankulathur, 603203, India; Graduate School of Science and Technology, Shizuoka University, 3-5-1 Johoku, Naka-Ku, Hamamatsu, Shizuoka, 432-8011, Japan; Nanotechnology Research Center (NRC), Faculty of Engineering and Technology, SRM Institute of Science and Technology, Kattankulathur, 603203, India
| | - S Harish
- Functional Materials and Energy Devices Laboratory, Department of Physics and Nanotechnology, SRM Institute of Science and Technology, Kattankulathur, 603203, India; Graduate School of Science and Technology, Shizuoka University, 3-5-1 Johoku, Naka-Ku, Hamamatsu, Shizuoka, 432-8011, Japan
| | - M Shimomura
- Graduate School of Science and Technology, Shizuoka University, 3-5-1 Johoku, Naka-Ku, Hamamatsu, Shizuoka, 432-8011, Japan.
| | - M Krishna Mohan
- Functional Materials and Energy Devices Laboratory, Department of Physics and Nanotechnology, SRM Institute of Science and Technology, Kattankulathur, 603203, India
| | - J Archana
- Functional Materials and Energy Devices Laboratory, Department of Physics and Nanotechnology, SRM Institute of Science and Technology, Kattankulathur, 603203, India
| | - M Navaneethan
- Functional Materials and Energy Devices Laboratory, Department of Physics and Nanotechnology, SRM Institute of Science and Technology, Kattankulathur, 603203, India; Nanotechnology Research Center (NRC), Faculty of Engineering and Technology, SRM Institute of Science and Technology, Kattankulathur, 603203, India.
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20
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Su R, Su W, Cai J, Cen L, Huang S, Wang Y, Li P. Photodynamic antibacterial application of TiO 2/curcumin/hydroxypropyl-cyclodextrin and its konjac glucomannan composite films. Int J Biol Macromol 2024; 254:127716. [PMID: 37924903 DOI: 10.1016/j.ijbiomac.2023.127716] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/31/2023] [Revised: 10/09/2023] [Accepted: 10/25/2023] [Indexed: 11/06/2023]
Abstract
Although photodynamic therapy (PDT) has great advantages for the treatment of bacterial infections, photosensitizers (PSs) often have many disadvantages that limit their application. Improving the shortcomings of PSs and developing efficient PDT antimicrobial materials remain serious challenges. In this study, a nanocomposite drug (TiO2/curcumin/hydroxypropyl-cyclodextrin, TiO2/Cur/HPCD) was constructed and combined with konjac glucomannan to form composite films (TiO2/Cur/HPCD films, KTCHD films). The stabilities of TiO2 and Cur were improved in the presence of HPCD. The particle size of TiO2/Cur/HPCD was approximately 33.9 nm, and the addition of TiO2/Cur/HPCD enhanced the mechanical properties of the films. Furthermore, TiO2/Cur/HPCD and KTCHD films exhibited good biocompatibility and PDT antibacterial effects. The antibacterial rate of TiO2/Cur/HPCD was 74.46 % against MRSA at 500 μg/mL and 99.998 % against E. coli at 400 μg/mL, while it was adsorbed on the surface of bacteria to improve the effectiveness of the treatment. In addition, studies in mice confirmed that TiO2/Cur/HPCD and KTCHD films can treat bacterial infections and promote wound healing, with a highest wound healing rate of 84.6 % in the KTCHD-10 films + Light group on day 12. Overall, TiO2/Cur/HPCD is a promising nano-antibacterial agent and KTCHD films have the potential to be employed as antibacterial and environment-friendly trauma dressings.
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Affiliation(s)
- Rixiang Su
- Guangxi Key Laboratory of Natural Polymer Chemistry and Physics, Nanning Normal University, Nanning, China; Guangxi University of Chinese Medicine, Nanning, China
| | - Wei Su
- Guangxi Key Laboratory of Natural Polymer Chemistry and Physics, Nanning Normal University, Nanning, China.
| | - Jinyun Cai
- Guangxi University of Chinese Medicine, Nanning, China
| | - Lei Cen
- Guangxi Key Laboratory of Natural Polymer Chemistry and Physics, Nanning Normal University, Nanning, China
| | | | - Yu Wang
- Guangxi University of Chinese Medicine, Nanning, China
| | - Peiyuan Li
- Guangxi University of Chinese Medicine, Nanning, China.
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21
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Sanmugam A, Sellappan LK, Manoharan S, Rameshkumar A, Kumar RS, Almansour AI, Arumugam N, Kim HS, Vikraman D. Development of chitosan-based cerium and titanium oxide loaded polycaprolactone for cutaneous wound healing and antibacterial applications. Int J Biol Macromol 2024; 256:128458. [PMID: 38016611 DOI: 10.1016/j.ijbiomac.2023.128458] [Citation(s) in RCA: 1] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/26/2023] [Revised: 11/10/2023] [Accepted: 11/24/2023] [Indexed: 11/30/2023]
Abstract
Cerium dioxide (CeO2) based nanomaterials have emerged as promising dermal equivalents, promoting fibroblast infiltration and tissues regeneration. To enhance the antibacterial and wound healing activity, herein chitosan (CS)-CeO2 combined nano titanium dioxide (TiO2) complex loaded polycaprolactone (PCL) nanohybrid (CS-CeO2/TiO2/PCL) scaffolds were prepared through casting method. The nanohybrid scaffolds' physiochemical, morphological, mechanical, and biological properties were evaluated using advanced analytical techniques. Fourier transform infrared spectroscopy spectrum evidently depicted the various intermolecular interactions on the nanohybrid scaffolds. The developed scaffold exhibited the high swelling behavior and good degradability and permeability which is beneficial for absorbing wound transudation to fasten the healing efficacy. Moreover, CS-CeO2/TiO2/PCL scaffolds owned the better antibacterial activity against bacterial strains E. coli and S. aureus. Also, MTT assay on fibroblast (NIH 3T3) cells and immortalized human keratinocytes (HaCaT) cells indicated improved cell viability and proliferation. In vivo results revealed that the fabricated scaffold full aid to complete wound closure after 14 days which showed CS-CeO2/TiO2/PCL as the significant wound dressing material with potential antibacterial immunity.
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Affiliation(s)
- Anandhavelu Sanmugam
- Department of Applied Chemistry, Sri Venkateswara College of Engineering, Sriperumbudur 602117, India
| | - Logesh Kumar Sellappan
- Department of Biomedical Engineering, KPR Institute of Engineering and Technology, Coimbatore 641407, India
| | - Swathy Manoharan
- Department of Biomedical Engineering, KPR Institute of Engineering and Technology, Coimbatore 641407, India
| | - A Rameshkumar
- Department of Chemistry, Bannari Amman Institute of Technology, Sathyamangalam, Erode 638401, India
| | - Raju Suresh Kumar
- Department of Chemistry, College of Science, King Saud University, Riyadh 1451, Saudi Arabia
| | - Abdulrahman I Almansour
- Department of Chemistry, College of Science, King Saud University, Riyadh 1451, Saudi Arabia
| | - Natrajan Arumugam
- Department of Chemistry, College of Science, King Saud University, Riyadh 1451, Saudi Arabia
| | - Hyun-Seok Kim
- Division of Electronics and Electrical Engineering, Dongguk University-Seoul, Seoul 04620, Republic of Korea
| | - Dhanasekaran Vikraman
- Division of Electronics and Electrical Engineering, Dongguk University-Seoul, Seoul 04620, Republic of Korea.
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22
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Aggelopoulos CA, Dolinski O. A comprehensive insight on plasma-catalytic degradation of organic pollutants in water: Comparison between ZnO and TiO 2. Chemosphere 2024; 347:140667. [PMID: 37951406 DOI: 10.1016/j.chemosphere.2023.140667] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 08/24/2023] [Revised: 10/30/2023] [Accepted: 11/06/2023] [Indexed: 11/14/2023]
Abstract
A novel system combining underwater plasma bubbles and high voltage nanopulses was combined for the first time with ZnO and TiO2 for the degradation of organic pollutants in water. The effect of catalyst loading, discharge power and plasma gas on pollutant degradation was investigated whereas the plasma-catalytic mechanism was explored through the quantification of plasma species, COD/TOC measurements and scavenging experiments in the presence and absence of catalysts. The increased efficiency in the presence of either ZnO or TiO2, especially under plasma gases (air and oxygen) able to produce UV radiation in the range of wavelengths absorbed by both catalysts, lies on the increased concentration of the critical reactive species (e.g. ·O2-, ·ΟΗ, H2O2). Compared to plasma alone process, H2O2 was significantly enhanced in the presence of TiO2 and decreased in the presence of ZnO, whereas ·OH concentration was higher in the plasma-ZnO but lower in the plasma-TiO2 system which supports the overall superior performance of ZnO compared to TiO2. The synergy of plasma-ZnO process compared to that of plasma-TiO2 was ∼2.4 and ∼1.5 times higher for Orange II (OII) and Methylene Blue (MB), respectively, exhibiting a very low electrical energy per order (1.4 kWh m-3 for OII and 0.31 kWh m-3 or MB). The present effort contributes on providing fundamental insights and further expand of plasma-catalysis for water treatment.
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Affiliation(s)
- C A Aggelopoulos
- Laboratory of Cold Plasma and Advanced Techniques for Improving Environmental Systems, Institute of Chemical Engineering Sciences, Foundation for Research and Technology Hellas (FORTH/ICE-HT), 26504, Patras, Greece.
| | - O Dolinski
- Laboratory of Cold Plasma and Advanced Techniques for Improving Environmental Systems, Institute of Chemical Engineering Sciences, Foundation for Research and Technology Hellas (FORTH/ICE-HT), 26504, Patras, Greece
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23
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Zong Z, Gilbert E, Wong CCY, Usadi L, Qin Y, Huang Y, Raymond J, Hankins N, Kwan J. Efficient sonochemical catalytic degradation of tetracycline using TiO 2 fractured nanoshells. Ultrason Sonochem 2023; 101:106669. [PMID: 37925913 PMCID: PMC10632962 DOI: 10.1016/j.ultsonch.2023.106669] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 08/27/2023] [Revised: 10/17/2023] [Accepted: 10/27/2023] [Indexed: 11/07/2023]
Abstract
Overexposure to antibiotics originating in wastewater has profound environmental and health implications. Conventional treatment methods are not fully effective in removing certain antibiotics, such as the commonly used antibiotic, tetracycline, leading to its accumulation in water catchments. Alternative antibiotic removal strategies are garnering attention, including sonocatalytic oxidative processes. In this work, we investigated the degradation of tetracycline using a combination of TiO2 fractured nanoshells (TFNs) and an advanced sonochemical reactor design. The study encompassed an examination of multiple process parameters to understand their effects on the degradation of tetracycline. These included tetracycline adsorption on TFNs, reaction time, initial tetracycline concentration, solvent pH, acoustic pressure amplitude, number of acoustic cycles, catalyst dosage, TFNs' reusability, and the impact of adjuvants such as light and H2O2. Though TFNs adsorbed tetracycline, the addition of ultrasound was able to degrade tetracycline completely (with 100% degradation) within six minutes. Under the optimal operating conditions, the proposed sonocatalytic system consumed 80% less energy compared to the values reported in recently published sonocatalytic research. It also had the lowest CO2 footprint when compared to the other sono-/photo-based technologies. This study suggests that optimizing the reaction system and operating the reaction under low power and at a lower duty cycle are effective in achieving efficient cavitation for sonocatalytic reactions.
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Affiliation(s)
- Zhiyuan Zong
- Department of Engineering Science, University of Oxford, Oxford OX1 3PJ, UK
| | - Emma Gilbert
- Department of Engineering Science, University of Oxford, Oxford OX1 3PJ, UK
| | - Cherie C Y Wong
- Department of Engineering Science, University of Oxford, Oxford OX1 3PJ, UK
| | - Lillian Usadi
- Department of Engineering Science, University of Oxford, Oxford OX1 3PJ, UK
| | - Yi Qin
- Department of Engineering Science, University of Oxford, Oxford OX1 3PJ, UK
| | - Yihao Huang
- Department of Engineering Science, University of Oxford, Oxford OX1 3PJ, UK
| | - Jason Raymond
- Department of Engineering Science, University of Oxford, Oxford OX1 3PJ, UK
| | - Nick Hankins
- Department of Engineering Science, University of Oxford, Oxford OX1 3PJ, UK
| | - James Kwan
- Department of Engineering Science, University of Oxford, Oxford OX1 3PJ, UK.
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24
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Sun Y, Yang YL, Chen HJ, Liu J, Shi XL, Suo G, Hou X, Ye X, Zhang L, Lu S, Chen ZG. Flexible, recoverable, and efficient photocatalysts: MoS 2/TiO 2 heterojunctions grown on amorphous carbon-coated carbon textiles. J Colloid Interface Sci 2023; 651:284-295. [PMID: 37542903 DOI: 10.1016/j.jcis.2023.07.177] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/26/2023] [Revised: 07/21/2023] [Accepted: 07/27/2023] [Indexed: 08/07/2023]
Abstract
Most traditional powder photocatalysts are not easily recovered. Herein, we report a flexible and recoverable photocatalyst with superior photocatalytic activity, in which MoS2/TiO2 heterojunctions are grown on amorphous carbon-coated carbon textiles (CT@C-MoS2/TiO2). Recoverable CT@C-MoS2/TiO2 textile was used to degrade 10 mg L-1 rhodamine B, leading to a degradation rate of up to 98.8 % within 30 min. Such a degradation rate is much higher than that of most of the reported studies. A density functional theory (DFT) calculation results illustrate charge transfer mechanism inside TiO2-C, MoS2-C, and MoS2/TiO2 heterojunctions, which shows that CT@C-MoS2/TiO2 textile with three electron separation channels has a high photogenerated carrier separation rate, which remarkably enhances the photocatalytic activity. Our work provides a novel strategy to design an efficient and recoverable photocatalyst with high activity.
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Affiliation(s)
- Yu Sun
- School of Materials Science and Engineering, Shaanxi Key Laboratory of Green Preparation and Functionalization for Inorganic Materials, Shaanxi University of Science and Technology, Xi'an 710021, China
| | - Yan-Ling Yang
- School of Materials Science and Engineering, Shaanxi Key Laboratory of Green Preparation and Functionalization for Inorganic Materials, Shaanxi University of Science and Technology, Xi'an 710021, China.
| | - Hua-Jun Chen
- School of Environment and Chemistry, Luoyang Institute of Science and Technology, Luoyang 471023, China
| | - Jiajun Liu
- School of Materials Science and Engineering, Shaanxi Key Laboratory of Green Preparation and Functionalization for Inorganic Materials, Shaanxi University of Science and Technology, Xi'an 710021, China
| | - Xiao-Lei Shi
- School of Chemistry and Physics, Queensland University of Technology, Brisbane, QLD 4000, Australia
| | - Guoquan Suo
- School of Materials Science and Engineering, Shaanxi Key Laboratory of Green Preparation and Functionalization for Inorganic Materials, Shaanxi University of Science and Technology, Xi'an 710021, China
| | - Xiaojiang Hou
- School of Materials Science and Engineering, Shaanxi Key Laboratory of Green Preparation and Functionalization for Inorganic Materials, Shaanxi University of Science and Technology, Xi'an 710021, China
| | - Xiaohui Ye
- School of Materials Science and Engineering, Shaanxi Key Laboratory of Green Preparation and Functionalization for Inorganic Materials, Shaanxi University of Science and Technology, Xi'an 710021, China
| | - Li Zhang
- School of Materials Science and Engineering, Shaanxi Key Laboratory of Green Preparation and Functionalization for Inorganic Materials, Shaanxi University of Science and Technology, Xi'an 710021, China
| | - Siyu Lu
- Green Catalysis Center, and College of Chemistry, Zhengzhou University, Zhengzhou 450001, China
| | - Zhi-Gang Chen
- School of Chemistry and Physics, Queensland University of Technology, Brisbane, QLD 4000, Australia.
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25
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Fu X, Kong Y, Wang M, Cai T, Zeng Q. MXene derived Ti 3C 2/TiO 2/Ag persistent photocatalyst with enhanced electron storage capacity for round-the-clock degradation of organic pollutant. J Colloid Interface Sci 2023; 656:233-240. [PMID: 37989056 DOI: 10.1016/j.jcis.2023.11.079] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/01/2023] [Revised: 11/09/2023] [Accepted: 11/12/2023] [Indexed: 11/23/2023]
Abstract
Persistent photocatalysis has garnered significant attention due to its ability to sustain catalytic activity in dark by storing electrons. However, the practical application of persistent photocatalysis is hindered by limited electron storage capacity. Herein, we synthesized and demonstrated that Ti3C2/TiO2/Ag persistent photocatalyst has good electron storage capability. The electron storage capacity of Ti3C2/TiO2/Ag is up to 0.125 μmol/mg, which is 2.5 times that of Ti3C2/TiO2. The enhanced electron storage capacity resulted in improved dark-reaction activity because more electrons react with oxygen to form more radicals, as evidenced by degradation experiments of various organics. Especially, persistent photocatalytic degradation of tetracycline hydrochloride by Ti3C2/TiO2/Ag was achieved under natural outdoor conditions (from 2:00p.m. to 8:00p.m.). Additionally, the aid of oxidants such as peroxymonosulfate (PMS) can further improve the dark-reaction activity. TiO2/Ti3C2/Ag/PMS system exhibits excellent efficacy in removing tetracycline hydrochloride, oxytetracycline, rhodamine b, methyl orange, and methylene blue, with removal rates reaching 79.5 %, 81.4 %, 98.9 %, 99.1 %, and 99.2 %, respectively (15 min of light-reaction and 45 min of dark-reaction). This work provides a new strategy to enhance electron storage capacity and demonstrates that decoupling of light-reaction and dark-reaction may provide a new opportunity for photocatalytic removal of pollutants around the clock.
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Affiliation(s)
- Xijun Fu
- School of Resources Environment and Safety Engineering, University of South China, Hengyang, Hunan 421001, PR China
| | - Yajing Kong
- School of Resources Environment and Safety Engineering, University of South China, Hengyang, Hunan 421001, PR China
| | - Minjie Wang
- School of Resources Environment and Safety Engineering, University of South China, Hengyang, Hunan 421001, PR China
| | - Tao Cai
- School of Resources Environment and Safety Engineering, University of South China, Hengyang, Hunan 421001, PR China.
| | - Qingyi Zeng
- School of Resources Environment and Safety Engineering, University of South China, Hengyang, Hunan 421001, PR China
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26
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Wang Z, Jin X, Chen F, Kuang X, Min J, Duan H, Li J, Chen J. Oxygen vacancy induced interaction between Pt and TiO 2 to improve the oxygen reduction performance. J Colloid Interface Sci 2023; 650:901-912. [PMID: 37453314 DOI: 10.1016/j.jcis.2023.07.024] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/20/2023] [Revised: 06/10/2023] [Accepted: 07/06/2023] [Indexed: 07/18/2023]
Abstract
In proton exchange membrane fuel cells (PEMFCS), a Pt-based catalyst has been plagued by activity and durability, making it difficult to implement in large-scale commercial applications. In this paper, a composite material formed by titanium dioxide and carbon black containing oxygen vacancies (TiO2(OV)-C) was used as a functional support to successfully load Pt nanoparticles (NPS). The introduction of oxygen vacancies induces the formation of a connection between Pt and TiO2, which not only strengthens the fixation of Pt by the composite support but also optimizes the local charge density of Pt. Compared with Pt/C (0.842 V) and Pt/TiO2-C (0.841 V), the half-wave potential (E1/2) of Pt/TiO2(OV)-C (0.862 V) is increased by 20 mV and 21 mV, respectively. After a long-term durability test, the E1/2 of Pt/TiO2(OV)-C is only attenuated by 5 mV. In addition, the mass activity (MA) and specific activity (SA) decreased from 183.4 mA mg-1 and 0.565 mA cm-2 to 144.4 mA mg-1 and 0.483 mA cm-2 at 0.85 V, only decreasing by 21% and 17 %, showing good stability. X-ray photoelectron spectroscopies (XPS) and density functional theory (DFT) calculations show that the interaction between Pt and TiO2 reduces the d-band center of Pt, thereby improving the desorption of intermediates *OH, which in turn promotes the activity of alkaline ORR. This study not only shows that OV plays a key role in the process of inducing interaction, but also deeply studies the influence of this interaction on the active site Pt, which provides more choices for the design of excellent multiphase catalysts.
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Affiliation(s)
- Ziyu Wang
- Key Laboratory of Solid State Physics and Devices Autonomous Region, School of Physics Science and Technology, Xinjiang University, Urumqi 830046, Xinjiang, PR China; Key Laboratory of Energy Materials Chemistry, Ministry of Education, Institute of Applied Chemistry, Xinjiang University, Urumqi, Xinjiang 830046, China
| | - Xuekun Jin
- School of Environment, Tsinghua University, Beijing 100084, China
| | - Fengjuan Chen
- Key Laboratory of Solid State Physics and Devices Autonomous Region, School of Physics Science and Technology, Xinjiang University, Urumqi 830046, Xinjiang, PR China; Key Laboratory of Energy Materials Chemistry, Ministry of Education, Institute of Applied Chemistry, Xinjiang University, Urumqi, Xinjiang 830046, China.
| | - Xuanyu Kuang
- Key Laboratory of Solid State Physics and Devices Autonomous Region, School of Physics Science and Technology, Xinjiang University, Urumqi 830046, Xinjiang, PR China; Key Laboratory of Energy Materials Chemistry, Ministry of Education, Institute of Applied Chemistry, Xinjiang University, Urumqi, Xinjiang 830046, China
| | - Junyong Min
- Key Laboratory of Solid State Physics and Devices Autonomous Region, School of Physics Science and Technology, Xinjiang University, Urumqi 830046, Xinjiang, PR China; Key Laboratory of Energy Materials Chemistry, Ministry of Education, Institute of Applied Chemistry, Xinjiang University, Urumqi, Xinjiang 830046, China
| | - Haiming Duan
- Key Laboratory of Solid State Physics and Devices Autonomous Region, School of Physics Science and Technology, Xinjiang University, Urumqi 830046, Xinjiang, PR China; Key Laboratory of Energy Materials Chemistry, Ministry of Education, Institute of Applied Chemistry, Xinjiang University, Urumqi, Xinjiang 830046, China
| | - Junhua Li
- School of Environment, Tsinghua University, Beijing 100084, China
| | - Jianjun Chen
- School of Environment, Tsinghua University, Beijing 100084, China.
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27
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Huang X, Yang G. Enhanced immobilization of Arsenic(III) and Auto-oxidation to Arsenic(V) by titanium oxide (TiO 2), due to Single-Atom vacancies and oxyanion formation. J Colloid Interface Sci 2023; 650:1327-1338. [PMID: 37478750 DOI: 10.1016/j.jcis.2023.07.103] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/11/2023] [Revised: 06/28/2023] [Accepted: 07/16/2023] [Indexed: 07/23/2023]
Abstract
Pollution control of As(III), a naturally occurring carcinogen, has recently gained a global attention, while due to the dominance of neutral H3AsO3 over a wide pH range, As(III) immobilization by most minerals is not efficient as As(V) immobilization. TiO2 shows promise for controlling As(III) pollution, and herein, a comprehensive study about As(III) adsorption by TiO2 and oxyanion formation is conducted by means of DFT + D3 methods. Both anatase and rutile are effective for As(III) adsorption, while As(III) adsorption affinities differ significantly and are -1.48 and -3.79 eV for pristine surfaces, ascend to -3.85 and -5.08 eV for O vacancies, and further to -5.37 and -5.26 eV for Ti vacancies, respectively. The bidentate binuclear complexes dominate for pristine surfaces, and O vacancies prefer OAs insertion into TiO2 lattice, while for Ti vacancies, all As(III) centers are auto-oxidized to As(V). Ti-3d, O-2p or/and As-4p rather than other orbitals contribute significantly to As adsorption, and O and Ti vacancies promote adsorption through stronger orbital hybridization. The superior adsorption for Ti vacancies originates from As(V) formation instead of bonding interactions. The formation of As oxyanions, which may occur spontaneously at pristine surfaces and is greatly promoted by O and Ti vacancies, enhances As(III) adsorption pronouncedly and becomes a viable strategy for As(III) immobilization. H2AsO3- and HAsO32- dominate for pristine surfaces and O vacancies, and for Ti vacancies, H2AsO4- and HAsO42- dominate over anatase whereas AsO43- also makes an important contribution over rutile. Results rationalize experimental observations available, and provide significantly new insights about the migration, bioavailability and fate of As(III) over TiO2 surfaces that facilitate the exploration of scavengers for As and other pollutants.
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Affiliation(s)
- Xiaoxiao Huang
- College of Resources and Environment, Southwest University, Chongqing 400715, China
| | - Gang Yang
- College of Resources and Environment, Southwest University, Chongqing 400715, China.
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28
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Zhang Z, Ran K, Wang W, Cao S, Zhao R, Zhou H, Xue W, Li H, Wang W, Min Z, Jiang K, Wang K. Plasma-induced oxygen defects in titanium dioxide to address the long-term stability of pseudocapacitive MnO 2 anode for lithium ion batteries. J Colloid Interface Sci 2023; 656:116-124. [PMID: 37984167 DOI: 10.1016/j.jcis.2023.11.087] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/11/2023] [Revised: 11/09/2023] [Accepted: 11/14/2023] [Indexed: 11/22/2023]
Abstract
In this work, we developed Manganese and Titanium based oxide composites with oxygen defects (MnOx@aTiOy) via plasma processing as anodes of lithium ion batteries. By appropriately adjusting the defect concentration, the ion transport kinetics and electrical conductivity of the electrodes are significantly improved, showing stable capacity retention. Furthermore, the incremental capacity is further activated and long-term stable cycling performance is achieved, with a specific capacity of 829.5 mAh/g at 1 A/g after 2000 cycles. To scrutinize the lithium migration paths and energy barriers in MnO2 and Mn2O3, the density functional theory (DFT) calculations is performed to explore the lithium migration paths and energy barriers. Although the transformation of MnO2 into Mn2O3 through oxygen defects was initially surmised to inhibit Li ions along their standard routes, our results indicate quite the contrary. In fact, the composite's lithium diffusion rate saw a substantial increase. This can be accredited to the pronounced enhancement of conductivity and ion transport efficiency in the amorphous and porous TiOy.
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Affiliation(s)
- Zidong Zhang
- School of Materials Science and Engineering, Huazhong University of Science and Technology, Wuhan, Hubei 430074, China; Engineering Research Center of Power Safety and Efficiency, Ministry of Education, Wuhan, Hubei 430074, China
| | - Ke Ran
- School of Materials and Energy, University of Electronic Science and Technology of China, Chengdu 610054, China
| | - Wenjian Wang
- Key Laboratory of Interfacial Physics and Technology, Shanghai Institute of Applied Physics, Chinese Academy of Sciences, Shanghai 201800, China
| | - Shengling Cao
- School of Materials Science and Engineering, Huazhong University of Science and Technology, Wuhan, Hubei 430074, China; Engineering Research Center of Power Safety and Efficiency, Ministry of Education, Wuhan, Hubei 430074, China
| | - Rui Zhao
- School of Materials and Energy, University of Electronic Science and Technology of China, Chengdu 610054, China
| | - Haiping Zhou
- School of Materials and Energy, University of Electronic Science and Technology of China, Chengdu 610054, China
| | - Weidong Xue
- School of Materials and Energy, University of Electronic Science and Technology of China, Chengdu 610054, China
| | - Haomiao Li
- School of Electrical and Electronic Engineering, State Key Laboratory of Advanced Electromagnetic Engineering and Technology, Huazhong University of Science and Technology, Wuhan, Hubei 430074, China; Engineering Research Center of Power Safety and Efficiency, Ministry of Education, Wuhan, Hubei 430074, China
| | - Wei Wang
- School of Materials Science and Engineering, Huazhong University of Science and Technology, Wuhan, Hubei 430074, China; School of Electrical and Electronic Engineering, State Key Laboratory of Advanced Electromagnetic Engineering and Technology, Huazhong University of Science and Technology, Wuhan, Hubei 430074, China; Engineering Research Center of Power Safety and Efficiency, Ministry of Education, Wuhan, Hubei 430074, China
| | - Zhou Min
- School of Electrical and Electronic Engineering, State Key Laboratory of Advanced Electromagnetic Engineering and Technology, Huazhong University of Science and Technology, Wuhan, Hubei 430074, China; Engineering Research Center of Power Safety and Efficiency, Ministry of Education, Wuhan, Hubei 430074, China
| | - Kai Jiang
- School of Electrical and Electronic Engineering, State Key Laboratory of Advanced Electromagnetic Engineering and Technology, Huazhong University of Science and Technology, Wuhan, Hubei 430074, China; Engineering Research Center of Power Safety and Efficiency, Ministry of Education, Wuhan, Hubei 430074, China
| | - Kangli Wang
- School of Electrical and Electronic Engineering, State Key Laboratory of Advanced Electromagnetic Engineering and Technology, Huazhong University of Science and Technology, Wuhan, Hubei 430074, China; Engineering Research Center of Power Safety and Efficiency, Ministry of Education, Wuhan, Hubei 430074, China.
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Zhang N, Gao C, Meng L, Tang X. Preparation and characterization of carnauba wax-based particle with hierarchical structure and its use as hydrophobic coating for chitosan films. Carbohydr Polym 2023; 319:121224. [PMID: 37567700 DOI: 10.1016/j.carbpol.2023.121224] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/16/2023] [Revised: 07/16/2023] [Accepted: 07/18/2023] [Indexed: 08/13/2023]
Abstract
To improve the hydrophobicity of polysaccharide-based films, hydrophobic carnauba wax-based particles were prepared by Pickering emulsion. The influence of the different size of the particles on the structure and hydrophobicity of the chitosan coating films were investigated. The results showed that micro-scale particles (average particle size 25.04 μm) with nano-scale (5-10 nm) TiO2 uniformly distributed on the surface of the particles were formed by Pickering emulsion. The chitosan coating films showed higher contact angle and lower sliding angle compared to the control due to the hierarchical structure, hydrophobicity and arrangement of the particles. In addition, the small particle (23-48 μm) coating film showed higher hydrophobicity than the large particle coating film (48-70 μm) due to the small particle size and the formation of more small gaps. The gaps were conducive to form "air cushion" which reduced the contact area between water and the coating films and thus increased contact angle and decreased sliding angle. The coating films showed high chemical stability and low residual rates of liquid food. The results suggest that Pickering emulsion is an effective method to create wax-based particles with hierarchical structure and the particles have potential to be used as hydrophobic coating materials.
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Affiliation(s)
- Ni Zhang
- College of Food Science and Engineering, Collaborative Innovation Center for Modern Grain Circulation and Safety, Key Laboratory of Grains and Oils Quality Control and Processing, Nanjing University of Finance and Economics, Nanjing 210023, China
| | - Chengcheng Gao
- College of Food Science and Engineering, Collaborative Innovation Center for Modern Grain Circulation and Safety, Key Laboratory of Grains and Oils Quality Control and Processing, Nanjing University of Finance and Economics, Nanjing 210023, China.
| | - Linghan Meng
- College of Food Science and Engineering, Collaborative Innovation Center for Modern Grain Circulation and Safety, Key Laboratory of Grains and Oils Quality Control and Processing, Nanjing University of Finance and Economics, Nanjing 210023, China
| | - Xiaozhi Tang
- College of Food Science and Engineering, Collaborative Innovation Center for Modern Grain Circulation and Safety, Key Laboratory of Grains and Oils Quality Control and Processing, Nanjing University of Finance and Economics, Nanjing 210023, China.
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30
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Morgade CIN, Schvval AB, García G, Cabeza GF. Band edges positions prediction of the of Ag nanocluster-decorated titania surfaces and their relationship to NO and NO 2 interaction from first-principles calculations. J Mol Graph Model 2023; 124:108531. [PMID: 37311332 DOI: 10.1016/j.jmgm.2023.108531] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/26/2023] [Revised: 05/13/2023] [Accepted: 05/23/2023] [Indexed: 06/15/2023]
Abstract
Metal nanoclusters deposited on oxides have been widely used in photocatalysis playing an important role in the design of model catalysts with applications in heterogeneous catalysis. In particular, we are interested in the potential activity of these cluster-supported systems for the removal of nitrogen oxides either by possible catalytic reduction and/or by their adsorption. In this work, using first-principles methods, we evaluate the main characteristics of Agn (n = 1-4) nanoclusters isolated and deposited on anatase TiO2(101) and rutile TiO2(110) surfaces. Our results indicate that they are preferably adsorbed on rutile surface. The different formation energy at each surface can be explained using a Bader charge analysis. Particularly for Ag4 the lowest formation energy is obtained for tetrahedral geometry while the isolated Ag4 geometry is planar. Small silver deposits placed superficially on titania surfaces modify its electronic structures and improve the conduction band edges positions for possible NO reduction. Band edges positions with respect to the vacuum potential have been studied. The comparison of the conduction band minimum with the reduction potentials of NO/N2O and N2O/N2 shows that they are higher, being Ag3 on rutile and Ag1, Ag2 and Ag4P on anatase better for NO reduction. To complete the analysis, the calculation of work function, energy gap, ionization energy and electron affinity are relevant since they allow the location of semiconductor band edges at point of zero charge. Finally, the adsorption of nitrogen oxides is studied where the NO2 adsorption is favored over NO.
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Affiliation(s)
- Cecilia I N Morgade
- Instituto de Física del Sur (IFISUR), CONICET- Departamento de Física, Universidad Nacional del Sur, Av. Alem 1253, Bahía Blanca, Argentina; Universidad Tecnológica Nacional, FRBB, 11 de abril 461, Bahía Blanca, Argentina
| | - Ana B Schvval
- Instituto de Química (INQUISUR) CONICET- Departamento de Química, Universidad Nacional del Sur, Av. Alem 1253, Bahía Blanca, Argentina
| | - Griselda García
- Instituto de Física, Pontificia Universidad Católica de Chile, 7820436, Santiago, Chile; Centro de Investigación en Nanotecnología y Materiales Avanzados, Pontificia Universidad Católica de Chile, 6904411, Santiago, Chile
| | - Gabriela F Cabeza
- Instituto de Física del Sur (IFISUR), CONICET- Departamento de Física, Universidad Nacional del Sur, Av. Alem 1253, Bahía Blanca, Argentina.
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31
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Thuan DV, Chu TTH, Thanh HDT, Le MV, Ngo HL, Le CL, Thi HP. Adsorption and photodegradation of micropollutant in wastewater by photocatalyst TiO 2/rice husk biochar. Environ Res 2023; 236:116789. [PMID: 37517481 DOI: 10.1016/j.envres.2023.116789] [Citation(s) in RCA: 1] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 05/31/2023] [Revised: 07/15/2023] [Accepted: 07/28/2023] [Indexed: 08/01/2023]
Abstract
With the acceleration of global industrialization, organic pollutants have become a threat to ecological safety and human health. This work prepared TiO2/rice husk biochar (TiO2/BC) for removal of bisphenol A (BA) micropollutant in wastewater. Experiment results revealed a low BA removal efficiency by TiO2/BC was observed at 34.5% under the dark environment. However, the removal rate of BA by UV light-assisted TiO2/BC significantly increased to 97.6% in 1 h. The results also demonstrated that the removal performance of BA using TiO2/BC was 2.1times higher than that of commercial TiO2 (46.4%). Besides, the removal efficiency of BA by reused TiO2/BC after eight cycles slightly decreased by 12.8%, demonstrating the excellent properties of the prepared composite. TiO2/BC also exhibited high removal efficiency of BA (over 89%) from the synthetic wastewater sample, indicating the potential utilization of composite for removing BA in wastewater. This work provides a new way to turn biomass waste into useful material and effective method to remove micropollutant BA.
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Affiliation(s)
- Doan Van Thuan
- VKTech Research Center, NTT Hi-Tech Institute, Nguyen Tat Thanh University, Nguyen Tat Thanh Street, Ward 13, District 4, Ho Chi Minh City, Viet Nam
| | - Thi Thu Hien Chu
- Department of Chemistry, Faculty of Building Materials, Ha Noi University of Civil Engineering (HUCE), Giai Phong, Hai Ba Trung, Hanoi, 10000, Viet Nam
| | - Ha Do Thi Thanh
- Department of Chemistry, Faculty of Building Materials, Ha Noi University of Civil Engineering (HUCE), Giai Phong, Hai Ba Trung, Hanoi, 10000, Viet Nam
| | - Minh Vien Le
- Faculty of Chemical Engineering, Ho Chi Minh City University of Technology (HCMUT), Ho Chi Minh City 700000, Viet Nam; Vietnam National University Ho Chi Minh City, Ho Chi Minh City 700000, Viet Nam
| | - Hoang Long Ngo
- VKTech Research Center, NTT Hi-Tech Institute, Nguyen Tat Thanh University, Nguyen Tat Thanh Street, Ward 13, District 4, Ho Chi Minh City, Viet Nam
| | - Cong Lap Le
- Department of Transportation Engineering, Nha Trang University, 650000, Viet Nam
| | - Huong Pham Thi
- Laboratory of Environmental Sciences and Climate Change, Institute for Computational Science and Artificial Intelligence, Van Lang University, Ho Chi Minh City, Viet Nam; Faculty of Environment, School of Technology, Van Lang University, Ho Chi Minh City, Viet Nam.
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Parashar D, Achari G, Kumar M. Multi-antibiotics removal under UV-A light using sol-gel prepared TiO 2: Central composite design, effect of persulfate addition and degradation pathway study. Chemosphere 2023; 341:140025. [PMID: 37660792 DOI: 10.1016/j.chemosphere.2023.140025] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 06/27/2023] [Revised: 08/29/2023] [Accepted: 08/30/2023] [Indexed: 09/05/2023]
Abstract
The removal of three antibiotics i.e., metronidazole (MNZ), ciprofloxacin (CIP) and tetracycline (TET), from aqueous system via TiO2 photocatalysis under UV-A light was investigated. Photocatalyst(s) were prepared using sol-gel method under different calcination temperatures (400-800 °C) and water-alcohol ratio. The spherical shaped catalyst (mean particle size ∼ 61 nm) was characterized via FTIR, XRD, BET, SEM, Raman, XPS, UV-DRS, and Fluorometry, and point of zero charge was also determined (pHPZC ∼ 6.6). Batch photo-catalytic degradation studies have shown complete degradation of MNZ, CIP and TET after 50, 75 and 20 min with a TOC removal of 37%, 44% and 31%, respectively. The activity of sol-gel prepared TiO2 was comparatively higher than commercially available pure anatase TiO2 nanoparticles due to lesser mean particle size. The ratio of water to alcohol in the preparation of TiO2 catalyst was found to have significant effect on antibiotic removal. Moreover, persulfate (PS) addition of 0.1 g/L amplified the pseudo-first-order removal-rate constant by 2.75, 3.3 and 1.6 times for MNZ, CIP and TET, respectively. The higher initial pH values (8 and 10) have shown the best removal efficiency for all antibiotics. Subsequently, central composite design (CCD) experiments were conducted under multi-antibiotic conditions. Near complete removal of all antibiotics were observed within 120 min. Scavenging studies revealed that hydroxyl and superoxide radicals play major roles in photo-catalytic degradation of MNZ, CIP and TET. During photocatalysis, MNZ degradation was initiated by hydroxylation reaction, CIP by piperazine ring opening by hydroxyl attack and TET by multiple hydroxylation process. Overall, TiO2 showed good efficiency at degrading multiple antibiotics and has the potential for practical application on a larger scale.
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Affiliation(s)
- Dinkar Parashar
- Environmental Engineering Division, Department of Civil Engineering, Indian Institute of Technology Madras, Chennai, Tamil Nadu, 600036, India
| | - Gopal Achari
- Department of Civil Engineering, University of Calgary, ENF 262, 2500 University Drive NW, Calgary, T2N 1N4, Canada
| | - Mathava Kumar
- Environmental Engineering Division, Department of Civil Engineering, Indian Institute of Technology Madras, Chennai, Tamil Nadu, 600036, India.
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Xu J, Olvera-Vargas H, Ou GHX, Randriamahazaka H, Lefebvre O. Hybrid TiO 2/Carbon quantum dots heterojunction photoanodes for solar photoelectrocatalytic wastewater treatment. Chemosphere 2023; 341:140077. [PMID: 37690559 DOI: 10.1016/j.chemosphere.2023.140077] [Citation(s) in RCA: 1] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 01/28/2023] [Revised: 08/23/2023] [Accepted: 09/04/2023] [Indexed: 09/12/2023]
Abstract
The modification of titanium dioxide (TiO2) is a strategy to maximize the utilization of sunlight. Carbon quantum dots (CQDs) are carbon nanomaterials with outstanding optical and electronic properties that are suitable for that purpose. In this work, three types of hybrid TiO2/CQD photoelectrodes were synthesized following different methods: 1) deposition of a CQD layer on top of TiO2 (labelled as TiO2-CQD); 2) deposition of a TiO2 layer on top of CQDs (labelled as CQD-TiO2) and; 3) deposition of a mixed CQD + TiO2 layer (labelled as CQD + TiO2). The photoelectrodes were investigated for the photoelectrocatalytic degradation of phenol as model pollutant under simulated solar light and TiO2-CQD showed the highest apparent reaction rate constant of kapp = 0.0117 min-1 with 40% of TOC removal in 6 h of treatment. CQDs were found to enhance photon absorption in the visible region of the electromagnetic spectrum and in turn phenol degradation by promoting the separation of photogenerated charge carriers through electron transfer via the Ti-O-C bonds formed at the TiO2-CQD interface. Finally, the performance of the TiO2-CQD photoanode was evaluated for the treatment of real wastewater from the membrane fabrication sector, confirming its photoelectrocatalytic efficiency under solar radiation with 93% of TOC removal in 8 h of treatment and kapp = 0.0058 min-1.
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Affiliation(s)
- Jianxiong Xu
- Centre for Water Research, Department of Civil and Environmental Engineering, National University of Singapore, 1 Engineering Drive 2, Singapore, 117576, Singapore
| | - Hugo Olvera-Vargas
- Centre for Water Research, Department of Civil and Environmental Engineering, National University of Singapore, 1 Engineering Drive 2, Singapore, 117576, Singapore; Instituto de Energías Renovables, Universidad Nacional Autónoma de México (IER-UNAM), Priv. Xochicalco S/N, Col. Centro, Temixco, Morelos, 62580, Mexico
| | - Gloria Hui Xin Ou
- Centre for Water Research, Department of Civil and Environmental Engineering, National University of Singapore, 1 Engineering Drive 2, Singapore, 117576, Singapore
| | | | - Olivier Lefebvre
- Centre for Water Research, Department of Civil and Environmental Engineering, National University of Singapore, 1 Engineering Drive 2, Singapore, 117576, Singapore; NUS Environmental Research Institute, National University of Singapore, #02-03, T-Lab Building 5A Engineering Drive 1, Singapore,117411.
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Sivaranjani SK, Durairaj K, Jayalakshmi G, Sumathi J, Balasubramanian B, Chelliapan S, Kamyab H, Hashim H, Kavitha D. Efficiency of CuCr 2O 4/Titanium dioxide nanoparticles composite for organic dye removal in aqueous solutions. Environ Res 2023; 236:116692. [PMID: 37500033 DOI: 10.1016/j.envres.2023.116692] [Citation(s) in RCA: 1] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 04/19/2023] [Revised: 07/12/2023] [Accepted: 07/15/2023] [Indexed: 07/29/2023]
Abstract
Semiconductor metal oxide with TiO2 nanoparticles removes hazardous compounds from environmental samples. TiO2 nanoparticles have shown potential as an efficient photocatalyst by being employed as a nano-catalyst for the breakdown of organic contaminants in wastewater samples. To separate substances from contaminated samples, combined UV and visible light irradiation has been used. Sol-gel synthesis was used to produce a copper chromite-titanium nanocomposite, which was then evaluated using analytical methods, such as XRD, BET, DRS-UV, and FT-IR. Using visible light, the photocatalytic activity of a nanocomposite made of CuCr2O4 and TiO2 was investigated for its role in the breakdown of malachite green. The effects of several parameters, including pH change, anions presence, contact time, catalyst amount, concentration variation, and the kinetics of photocatalytic degradation were investigated. The magnitude of transition energy calculated using UV-DRS spectra was found to be 3.1 eV for CuCr2O4-TiO2 nanocomposite. Maximum degradation was observed at pH 7.0. The surface area and pore volume of the co-doped samples of Cr2O4 - TiO2 obtained from BET were found to be 6.1213 m2/g and 0.045063 cm3/g respectively. The average particle size of the catalyst of the nano-catalysts calculated from XRD was found to be 8 nm for TiO2 and 66 nm for TiO2-CuCrO4. The peaks obtained in FTIR between the range of 900-500 cm-1 were due to the presence of an aromatic compound. The binding mechanism of a dye molecule to the surface of CuCr2O4-TiO2 nanocomposite was analysed using quantum chemical calculations with the self-consistent reaction field technique employing integral equation formalism for the polarized continuum method and the UFF atomic radii set.
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Affiliation(s)
| | - Kaliannan Durairaj
- Zoonosis Research Center, Department of Infection Biology, School of Medicine, Wonkwang University, 54538 Iksan, Republic of Korea
| | - Govindaswamy Jayalakshmi
- Department of Chemistry, Dr. M.G.R Educational and Research Institute, Chennai, Tamil Nadu, India
| | - Jayasankar Sumathi
- Department of Chemistry, Dr. M.G.R Educational and Research Institute, Chennai, Tamil Nadu, India
| | | | - Shreeshivadasan Chelliapan
- Engineering Department, Razak Faculty of Technology and Informatics, Universiti Teknologi Malaysia, Jln Sultan Yahya Petra, 54100, Kuala Lumpur, Malaysia
| | - Hesam Kamyab
- Faculty of Architecture and Urbanism, UTE University, Calle Rumipamba S/N and Bourgeois, Quito, Ecuador; Process Systems Engineering Centre (PROSPECT), Faculty of Chemical and Energy Engineering, Faculty of Engineering, Universiti Teknologi Malaysia, Skudai, Johor, Malaysia; Department of Biomaterials, Saveetha Dental College and Hospital, Saveetha Institute of Medical and Technical Sciences, Chennai, 600 077, India.
| | - Haslenda Hashim
- Process Systems Engineering Centre (PROSPECT), Faculty of Chemical and Energy Engineering, Faculty of Engineering, Universiti Teknologi Malaysia, Skudai, Johor, Malaysia; Faculty of Chemical and Energy Engineering, Universiti Teknologi Malaysia, Skudai, Johor, Malaysia
| | - Dhamodaran Kavitha
- Department of Chemistry, Dr. M.G.R Educational and Research Institute, Chennai, Tamil Nadu, India.
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Hassan HMA, Alsohaimi IH, El-Aassar MR, El-Hashemy MA, El-Sayed MY, Alotaibi NF, Betiha MA, Alsuhybani M, Alenazi RA. Electrospun TiO 2-GO/PAN-CA nanofiber mats: A novel material for remediation of organic contaminants and nitrophenol reduction. Environ Res 2023; 234:116587. [PMID: 37423355 DOI: 10.1016/j.envres.2023.116587] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 04/20/2023] [Revised: 06/30/2023] [Accepted: 07/06/2023] [Indexed: 07/11/2023]
Abstract
The outstanding properties of nanofiber composites have made them a popular choice for various structural applications. Recently, there has been a growing interest in using electrospun nanofibers as reinforcement agents, which possess exceptional properties that can enhance the performance of these composites. Herein, TiO2-graphene oxide (GO) nanocomposite incorporated into polyacrylonitrile (PAN)/cellulose acetate (CA) nanofibers were fabricated by an effortless electrospinning technique. The chemical and structural characteristics of the resulting electrospun TiO2-GO nanofibers were examined employing diverse techniques such as XRD, FTIR, XPS, TGA, mechanical properties, and FESEM. Remediation of organic contaminants and organic transformation reactions with electrospun TiO2-GO nanofibers were performed. The results indicated that the incorporation of TiO2-GO with various TiO2/GO ratios did not affect the molecular structure of PAN-CA. Still, they did significantly increase the mean fiber diameter (234-467 nm) and the mechanical properties of the nanofibers comprising UTS, elongation, Young's modulus, and toughness compared to PAN-CA. From various ratios of TiO2/GO (0.01TiO2/0.005GO and 0.005TiO2/0.01GO) in the electrospun NFs, the nanofiber containing a high content of TiO2 showed over 97% of the initial MB dyes were degraded after 120 min of visible light exposure and the same nanofibers also, achieved 96% nitrophenol conversion to aminophenol in just 10 min with activity factor kAF value of 47.7 g-1min-1. These findings illustrate the promise of TiO2-GO/PAN-CA nanofibers for use in various structural applications, particularly in the remediation of organic contaminants from water and organic transformation reactions.
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Affiliation(s)
- Hassan M A Hassan
- Chemistry Department, College of Science, Jouf University, P.O. Box 2014, Sakaka, Saudi Arabia.
| | - Ibrahim Hotan Alsohaimi
- Chemistry Department, College of Science, Jouf University, P.O. Box 2014, Sakaka, Saudi Arabia.
| | - M R El-Aassar
- Chemistry Department, College of Science, Jouf University, P.O. Box 2014, Sakaka, Saudi Arabia
| | - Mohammed A El-Hashemy
- Chemistry Department, College of Science, Jouf University, P.O. Box 2014, Sakaka, Saudi Arabia
| | - Mohamed Y El-Sayed
- Chemistry Department, College of Science, Jouf University, P.O. Box 2014, Sakaka, Saudi Arabia
| | - N F Alotaibi
- Chemistry Department, College of Science, Jouf University, P.O. Box 2014, Sakaka, Saudi Arabia
| | - Mohamed A Betiha
- Egyptian Petroleum Research Institute, Cairo, Nasr City, 11727, Egypt
| | | | - Raghad Ayed Alenazi
- Chemistry Department, College of Science, Jouf University, P.O. Box 2014, Sakaka, Saudi Arabia
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Ren Y, Zhao Z, Fan T, Luan R, Yao L, Shen H, Hu X, Cui L, Li MX. Chitosan and TiO 2 functionalized polypropylene nonwoven fabrics with visible light induced photocatalytic antibacterial performances. Int J Biol Macromol 2023; 250:126305. [PMID: 37573905 DOI: 10.1016/j.ijbiomac.2023.126305] [Citation(s) in RCA: 4] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/13/2023] [Revised: 07/31/2023] [Accepted: 08/10/2023] [Indexed: 08/15/2023]
Abstract
Chitosan/TiO2 functionalized polypropylene (CS/TiO2/PP) nonwoven fabrics were fabricated through crosslinking of chitosan with glutaraldehyde followed by loading of TiO2 nanoparticles. The functionalized CS/TiO2/PP has super hydrophilicity and excellent visible light induced photocatalytic antibacterial properties owing to the synergistic effects of CS and TiO2. The photocatalytic degradation performance was determined by assessing the degradation of methyl blue under simulated visible light irradiation and its recyclability was also evaluated. In addition, SEM images demonstrated that TiO2 nanoparticles were distributed evenly on the surface of the 2 g/L CS/TiO2/PP. Meanwhile, the polypropylene surface showed a significant increase in hydrophilicity after being treated with chitosan and TiO2. The photocatalytic degradation results revealed that CS/TiO2/PP had higher photocatalytic properties than those of pure PP under visible light, and the degradation rate of methylene blue reached 96.4 % after 90 min of light exposure. Compared to pure PP, the antibacterial properties of CS/TiO2/PP significantly increased, and the bacterial reduction percentages were increased to 98.7 % and 96.3 %, against E. coli and S. aureus, respectively. The functionalized CS/TiO2/PP composites exhibited promising potential in environmentally friendly antibacterial materials.
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Affiliation(s)
- Yu Ren
- School of Textile and Clothing, Nantong University, Jiangsu 226019, China
| | - Ziyao Zhao
- School of Textile and Clothing, Nantong University, Jiangsu 226019, China
| | - Tingyue Fan
- School of Textile and Clothing, Nantong University, Jiangsu 226019, China
| | - Rui Luan
- School of Textile and Clothing, Nantong University, Jiangsu 226019, China
| | - Lirong Yao
- School of Textile and Clothing, Nantong University, Jiangsu 226019, China
| | - Hong Shen
- Huzhou Zhongshi Technology Co., Ltd., Xin Feng Ming Group, Zhejiang 313000, China
| | - Xingqi Hu
- Huzhou Zhongshi Technology Co., Ltd., Xin Feng Ming Group, Zhejiang 313000, China
| | - Li Cui
- College of Materials and Textile Engineering, Jiaxing University, Zhejiang 314001, China
| | - Mei-Xian Li
- School of Textile and Clothing, Nantong University, Jiangsu 226019, China.
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37
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Li J, Jiang X, Guan H, Liu Z, Li J, Lin Z, Li F, Xu W. Visible-light-driven peroxymonosulfate activation by robust TiO 2-base nanoparticles for efficient removal of sulfamethoxazole. Environ Pollut 2023; 334:122150. [PMID: 37429490 DOI: 10.1016/j.envpol.2023.122150] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 05/14/2023] [Revised: 07/03/2023] [Accepted: 07/04/2023] [Indexed: 07/12/2023]
Abstract
In this study, a novel bimetallic Co-Mo-TiO2 nanomaterial was fabricated through a simple two-step method, and applied as photocatalyst to activate peroxymonosulfate (PMS) with high efficiency for sulfamethoxazole (SMX) removal under visible light. Nearly 100% of SMX was degraded within 30 min in Vis/Co-Mo-TiO2/PMS system, and its kinetic reaction rate constant (0.099 min-1) was 24.8 times higher compare with the Vis/TiO2/PMS system (0.014 min-1). Moreover, the quenching experiments and the electronic spin resonance analysis results confirmed that both 1O2 and SO4•- were the dominant active species in the optimal system, and the redox cycles of Co3+/Co2+ and Mo6+/Mo4+ promoted the generation of the radicals during the PMS activation process. Additionally, the Vis/Co-Mo-TiO2/PMS system exhibited a wide working pH range, superior catalytic performance toward different pollutants and excellent stability with 92.8% SMX removal capacity retention after three consecutive cycles. The result of density functional theory (DFT) suggested that Co-Mo-TiO2 exhibited a high affinity for PMS adsorption, as indicated by the length O-O bond from PMS and the Eads of the catalysts. Finally, the possible degradation pathway of SMX in optimal system was proposed through intermediate identification and DFT calculation, and a toxicity assessment of the by-products was also conducted.
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Affiliation(s)
- Jianghong Li
- School of Transportation and Civil Engineering, Foshan University, Foshan, 528000, China
| | - Xueding Jiang
- School of Environmental and Chemical Engineering, Foshan University, Foshan, 528000, China
| | - Haishan Guan
- School of Environmental and Chemical Engineering, Foshan University, Foshan, 528000, China
| | - Zhang Liu
- Division of Environment and Sustainability, The Hong Kong University of Science and Technology, Clear Water Bay, Kowloon, Hong Kong, China
| | - Jiesen Li
- School of Environmental and Chemical Engineering, Foshan University, Foshan, 528000, China
| | - Zhifeng Lin
- School of Environmental and Chemical Engineering, Foshan University, Foshan, 528000, China
| | - Fuhua Li
- School of Environmental and Chemical Engineering, Foshan University, Foshan, 528000, China
| | - Weicheng Xu
- School of Environmental and Chemical Engineering, Foshan University, Foshan, 528000, China.
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38
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Liu YH, Liu C, Wang XH, Li T, Zhang X. Electrochemical sensor for sensitive detection of bisphenol A based on molecularly imprinted TiO 2 with oxygen vacancy. Biosens Bioelectron 2023; 237:115520. [PMID: 37429148 DOI: 10.1016/j.bios.2023.115520] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/10/2023] [Revised: 06/18/2023] [Accepted: 07/05/2023] [Indexed: 07/12/2023]
Abstract
Bisphenol A (BPA) is an endocrine disrupting chemical and broadly used in plastics. The leakage of BPA in food and water cycles poses a significant risk to the environment and human health. Thus, monitoring the concentration of BPA to avoid its potential risk is highly important. In this work, a simple and efficient oxygen deficient molecularly imprinted TiO2 electrochemical sensor was proposed for the detection of BPA. The introduction both oxygen vacancies and molecular imprinting evidently enhanced the electrochemical oxidation signal of BPA. The sensor had a good linear response ranging from 0.01 μM to 20 μM with a limit of detection of 3.6 nM. Additionally, the sensor showed remarkable stability, reproducibility and interference resistant ability. It also exhibits excellent recovery during the detection of real water. These findings suggested that the sensor has the potential to be developed as a simple, efficient and low-cost monitoring system for the monitoring of BPA in water.
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Affiliation(s)
- Yu-Huan Liu
- Information Materials and Intelligent Sensing Laboratory of Anhui Province, Institutes of Physical Science and Information Technology, Anhui University, Hefei, 230601, China
| | - Chang Liu
- Information Materials and Intelligent Sensing Laboratory of Anhui Province, Institutes of Physical Science and Information Technology, Anhui University, Hefei, 230601, China.
| | - Xin-Hui Wang
- Information Materials and Intelligent Sensing Laboratory of Anhui Province, Institutes of Physical Science and Information Technology, Anhui University, Hefei, 230601, China
| | - Tong Li
- Information Materials and Intelligent Sensing Laboratory of Anhui Province, Institutes of Physical Science and Information Technology, Anhui University, Hefei, 230601, China
| | - Xing Zhang
- Information Materials and Intelligent Sensing Laboratory of Anhui Province, Institutes of Physical Science and Information Technology, Anhui University, Hefei, 230601, China.
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Zhang J, Zhou Z, Xiao B, Zhou C, Jiang Z, Liang Y, Sun Z, Xiong J, Chen G, Zhu H, Wang S. Visible-light photocatalytic degradation of water-soluble polyvinyl alcohol in aqueous solution by Cu 2O@TiO 2: Optimization of conditions, mechanisms and toxicity analysis. J Environ Manage 2023; 341:118054. [PMID: 37148766 DOI: 10.1016/j.jenvman.2023.118054] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 01/26/2023] [Revised: 04/24/2023] [Accepted: 04/27/2023] [Indexed: 05/08/2023]
Abstract
Polyvinyl alcohol (PVA), a water-soluble synthetic polymer, is one of the most prevalent non-native polyvinyl alcohols found in the environment. Due to its inherent invisibility, its potential for causing severe environmental pollution is often underestimated. To achieve efficient degradation of PVA in wastewater, a Cu2O@TiO2 composite was synthesized through the modification of titanium dioxide with cuprous oxide, and its photocatalytic degradation of PVA was investigated. The Cu2O@TiO2 composite, supported by titanium dioxide, facilitated photocarrier separation and demonstrated high photocatalytic efficiency. Under alkaline conditions, the composite exhibited a 98% degradation efficiency for PVA solutions and a 58.7% PVA mineralization efficiency. Radical capture experiments and electron paramagnetic resonance (EPR) analyses revealed that superoxide radicals primarily drive the degradation process within the reaction system. Throughout the degradation process, PVA macromolecules are broken down into smaller molecules, including ethanol, and compounds containing aldehyde, ketone, and carboxylic acid functional groups. Although the intermediate products exhibit reduced toxicity compared to PVA, they still pose certain toxic hazards. Consequently, further research is necessary to minimize the environmental impact of these degradation products.
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Affiliation(s)
- Jiaming Zhang
- School of Resources, Environment and Materials, Guangxi University, Nanning 530004, PR China
| | - Zhenqi Zhou
- School of Resources, Environment and Materials, Guangxi University, Nanning 530004, PR China
| | - Bing Xiao
- School of Resources, Environment and Materials, Guangxi University, Nanning 530004, PR China
| | - Chenxu Zhou
- School of Resources, Environment and Materials, Guangxi University, Nanning 530004, PR China
| | - Zhongqin Jiang
- School of Resources, Environment and Materials, Guangxi University, Nanning 530004, PR China
| | - Yinna Liang
- College of Light Industry and Food Engineering, Guangxi University, Nanning 530004, China
| | - Zhuo Sun
- College of Light Industry and Food Engineering, Guangxi University, Nanning 530004, China
| | - Jianhua Xiong
- School of Resources, Environment and Materials, Guangxi University, Nanning 530004, PR China; Guangxi Key Laboratory of Clean Pulp & Papermaking and Pollution Control, Nanning, 530004, China.
| | - Guoning Chen
- Guangxi Bossco Environmental Protection Technology Co., Ltd., Nanning 530007, China
| | - Hongxiang Zhu
- Guangxi Key Laboratory of Clean Pulp & Papermaking and Pollution Control, Nanning, 530004, China
| | - Shuangfei Wang
- Guangxi Key Laboratory of Clean Pulp & Papermaking and Pollution Control, Nanning, 530004, China
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Wang D, Wan X, Wang J, Mangelings D, Xu Q, Xie F, Huang X, Li W, Xuan H, Zou W, Qu Q. Applicability of core-shell SiO 2 microspheres with a high TiO 2 loading as stationary phase for HPLC. Anal Chim Acta 2023; 1272:341527. [PMID: 37355322 DOI: 10.1016/j.aca.2023.341527] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/17/2023] [Revised: 06/07/2023] [Accepted: 06/12/2023] [Indexed: 06/26/2023]
Abstract
BACKGROUND Due to its high chemical stability, sufficient rigidity and zwitterionic ion exchange properties, TiO2 can be considered as an alternative stationary phase material to SiO2 for high performance liquid chromatography. TiO2 stationary phase is usually prepared by coating TiO2 onto SiO2 support by sol-gel method. However, in the traditional coating method, in order to overcome the rapid hydrolysis rate of tetrabutyl orthotitanate, only a very low concentration of tetrabutyl orthotitanate can be used, resulting in a low loading of TiO2 on the support. RESULTS TiO2 core-shell spheres with a good monodispersity were prepared using 0.25 mol L-1 tetrabutyl orthotitanate. The specific surface area, pore volume, pore diameter and TiO2 loading of the TiO2 core-shell spheres were 66 m2 g-1, 0.15 cm3 g-1, 9.8 nm and 57%, respectively. The core-shell spheres were derivatized with n-octadecyltrichlorosilane and then packed into a stainless steel column to test the separation performance for neutral, basic and acidic samples in liquid chromatography. A baseline separation of polyaromatic hydrocarbons was achieved, showing a column efficiency for fluorene of 118075 plates m-1. The prepared stationary phase was also used to separate acidic and basic mixtures, and column efficiencies of 54500 and 25836 plates m-1 were obtained for N,N-dinitroaniline and p-chlorophenol, respectively. The relative standard deviations of the retention times of polyaromatic hydrocarbons for run-to-run, day-to-day and column-to-column repeatability were all below 5.1%. SIGNIFICANCE AND NOVELTY This work demonstrated that TiO2 can be coated in the pores of the shell of SiO2 core-shell spheres with high TiO2 loading using a high concentration of tetrabutyl orthotitanate as the titania source. The experimental results show that the TiO2 coated core-shell spheres can be a good alternative stationary phase for liquid chromatography.
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Affiliation(s)
- Dian Wang
- Key Laboratory of Functional Molecule Design and Interface Process, School of Materials Science and Chemical Engineering, Anhui Jianzhu University, Hefei, 230601, China
| | - Xiang Wan
- Key Laboratory of Functional Molecule Design and Interface Process, School of Materials Science and Chemical Engineering, Anhui Jianzhu University, Hefei, 230601, China
| | - Jiafei Wang
- Key Laboratory of Functional Molecule Design and Interface Process, School of Materials Science and Chemical Engineering, Anhui Jianzhu University, Hefei, 230601, China
| | - Debby Mangelings
- Vrije Universiteit Brussel, Department of Analytical Chemistry, Applied Chemometrics and Molecular Modelling, Laarbeeklaan, 103, B-1090, Brussels, Belgium
| | - Qin Xu
- College of Chemistry and Chemical Engineering, Yangzhou University, Yangzhou, 225002, China
| | - Fazhi Xie
- Key Laboratory of Functional Molecule Design and Interface Process, School of Materials Science and Chemical Engineering, Anhui Jianzhu University, Hefei, 230601, China; Anhui Provincial Key Laboratory of Environmental Pollution Control and Resource Reuse, School of Environment and Energy Engineering, Anhui Jianzhu University, Hefei, 230601, China.
| | - Xianhuai Huang
- Anhui Provincial Key Laboratory of Environmental Pollution Control and Resource Reuse, School of Environment and Energy Engineering, Anhui Jianzhu University, Hefei, 230601, China
| | - Weihua Li
- Anhui Provincial Key Laboratory of Environmental Pollution Control and Resource Reuse, School of Environment and Energy Engineering, Anhui Jianzhu University, Hefei, 230601, China
| | - Han Xuan
- Key Laboratory of Functional Molecule Design and Interface Process, School of Materials Science and Chemical Engineering, Anhui Jianzhu University, Hefei, 230601, China
| | - Wensheng Zou
- Key Laboratory of Functional Molecule Design and Interface Process, School of Materials Science and Chemical Engineering, Anhui Jianzhu University, Hefei, 230601, China
| | - Qishu Qu
- Key Laboratory of Functional Molecule Design and Interface Process, School of Materials Science and Chemical Engineering, Anhui Jianzhu University, Hefei, 230601, China.
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Xu J, Zhou Z, Liu M, Wang J, Zhang L. Photocatalytic depolymerization of lignin via oxidizing cleavage of C α-C β bonds in micellar aqueous media. Int J Biol Macromol 2023; 245:125476. [PMID: 37353112 DOI: 10.1016/j.ijbiomac.2023.125476] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/25/2023] [Revised: 06/11/2023] [Accepted: 06/16/2023] [Indexed: 06/25/2023]
Abstract
Photocatalytic depolymerization of lignin to prepare high-value chemicals is a promising way to promote the valuable utilization of lignin. However, the complexity and stubbornness of lignin structure seriously decrease the photocatalytic efficiency and selectivity. Herein, the micellar aqueous media (SDS-8/HCl) consisting of sodium lauryl sulfonate and hydrochloric acid was successfully prepared. Photocatalyst TiO2 and SDS-8/HCl system can effectively depolymerize the typical β-1 lignin models and ethanol organosolv lignin to value-added chemicals by oxidizing cleavage of lignin Cα-Cβ bonds. The addition of hydrochloric acid solution (1 mol/L) improves the selectivity of photocatalytic breaking of lignin Cα-Cβ bonds. Chlorine ions are oxidized to chlorine radicals by photogenerated holes and hydroxyl radicals, dramatically increasing the photocatalytic efficiency. Electron paramagnetic resonance technique and Gas chromatography-mass spectrometry were used to demonstrate the presence of chlorine radicals. Under optimal conditions, the conversion of substrate Dpol is 98.4 %, and the obtained products are mainly benzaldehyde and benzoic acid. Isotope labeling experiments show that water is also involved in photocatalytic reactions and the oxygen needed to form the product benzaldehyde comes from water. Single-electron transfer processes are possible photocatalytic mechanisms that differ from the previous reports. Importantly, water and chlorine ions were found to be involved in photocatalytic reactions for the first time and promote the cleavage of lignin Cα-Cβ bonds. This work provides new ideas for photocatalytic cleavage of lignin Cα-Cβ bonds in heterogeneous photocatalytic systems using micellar aqueous media.
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Affiliation(s)
- Jie Xu
- College of Material and Chemical Engineering, Chuzhou University, Chuzhou, Anhui 239000, China.
| | - Zijie Zhou
- College of Material and Chemical Engineering, Chuzhou University, Chuzhou, Anhui 239000, China
| | - Meng Liu
- College of Material and Chemical Engineering, Chuzhou University, Chuzhou, Anhui 239000, China
| | - Jinyu Wang
- College of Material and Chemical Engineering, Chuzhou University, Chuzhou, Anhui 239000, China
| | - Lihui Zhang
- College of Material and Chemical Engineering, Chuzhou University, Chuzhou, Anhui 239000, China
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Liapun V, Hanif MB, Sihor M, Vislocka X, Pandiaraj S, V K U, Thirunavukkarasu GK, Edelmannová MF, Reli M, Monfort O, Kočí K, Motola M. Versatile application of BiVO 4/TiO 2 S-scheme photocatalyst: Photocatalytic CO 2 and Cr(VI) reduction. Chemosphere 2023:139397. [PMID: 37406942 DOI: 10.1016/j.chemosphere.2023.139397] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 04/12/2023] [Revised: 06/20/2023] [Accepted: 06/30/2023] [Indexed: 07/07/2023]
Abstract
Herein, the synthesis, characterization, and reduction properties of 2D TiO2 aerogel powder decorated with BiVO4 (TiO2/BiVO4) were investigated for versatile applications. First, 2D TiO2 was prepared via lyophilization and subsequently modified with BiVO4 using a wet impregnation method. The morphology, structure, composition, and optical properties were evaluated using transmission electron microscopy (TEM), X-ray diffractometry (XRD), laser-induced breakdown spectroscopy (LIBS), and diffuse reflectance spectroscopy (DRS), respectively. Significantly enhanced photocurrent densities (by 3-15 times) were obtained for TiO2/BiVO4 compared to those of pure TiO2 and BiVO4. The reduction of toxic Cr(VI) to Cr(III) was assessed, including the effect of pH on overall photocatalytic efficiency. Under acidic conditions (pH ∼ 2), Cr(VI) reduction efficiency reached 100% within 2 h. For photocatalytic CO2 reduction, the highest yields of CH4 and CO were obtained using TiO2/BiVO4. A higher efficiency for both applications was achieved because of the better separation of the electron-hole pairs in TiO2/BiVO4. The excellent stability of TiO2/BiVO4 over repeated runs highlights its potential for use in versatile environmental applications. The efficiency of TiO2/BiVO4 is due to the interplay of the structure, morphology, composition, and photoelectrochemical properties that favour the material for the presented herein photocatalytic applications.
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Affiliation(s)
- Viktoriia Liapun
- Department of Inorganic Chemistry, Faculty of Natural Sciences, Comenius University Bratislava, Ilkovicova 6, 842 15, Bratislava, Slovakia; Department of Environmental Ecology and Landscape Management, Faculty of Natural Sciences, Comenius University Bratislava, Ilkovicova 6, 842 15, Bratislava, Slovakia
| | - Muhammad Bilal Hanif
- Department of Inorganic Chemistry, Faculty of Natural Sciences, Comenius University Bratislava, Ilkovicova 6, 842 15, Bratislava, Slovakia
| | - Marcel Sihor
- Institute of Environmental Technology, CEET, VSB-Technical University of Ostrava, 17. Listopadu 15/2172, Ostrava, Poruba, Czech Republic
| | - Xenia Vislocka
- Institute of Inorganic Chemistry, Czech Academy of Sciences, Husinec-Rez 1001, Rez, 250 68, Czech Republic
| | - Saravanan Pandiaraj
- Department of Self-Development Skills, CFY Deanship, King Saud University, Riyadh, 11451, Saudi Arabia
| | - Unnikrishnan V K
- Centre of Excellence for Biophotonics, Department of Atomic and Molecular Physics, Manipal Academy of Higher Education, Manipal, 576104, India
| | - Guru Karthikeyan Thirunavukkarasu
- Department of Inorganic Chemistry, Faculty of Natural Sciences, Comenius University Bratislava, Ilkovicova 6, 842 15, Bratislava, Slovakia
| | - Miroslava Filip Edelmannová
- Institute of Environmental Technology, CEET, VSB-Technical University of Ostrava, 17. Listopadu 15/2172, Ostrava, Poruba, Czech Republic
| | - Martin Reli
- Institute of Environmental Technology, CEET, VSB-Technical University of Ostrava, 17. Listopadu 15/2172, Ostrava, Poruba, Czech Republic
| | - Olivier Monfort
- Department of Inorganic Chemistry, Faculty of Natural Sciences, Comenius University Bratislava, Ilkovicova 6, 842 15, Bratislava, Slovakia
| | - Kamila Kočí
- Institute of Environmental Technology, CEET, VSB-Technical University of Ostrava, 17. Listopadu 15/2172, Ostrava, Poruba, Czech Republic.
| | - Martin Motola
- Department of Inorganic Chemistry, Faculty of Natural Sciences, Comenius University Bratislava, Ilkovicova 6, 842 15, Bratislava, Slovakia.
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43
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Jaswal V, J RB, N YK. Synergistic effect of TiO 2 nanostructured cathode in microbial fuel cell for bioelectricity enhancement. Chemosphere 2023; 330:138556. [PMID: 37003439 DOI: 10.1016/j.chemosphere.2023.138556] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 08/09/2022] [Revised: 03/19/2023] [Accepted: 03/29/2023] [Indexed: 05/14/2023]
Abstract
Nano-bedecking of electrode with nanoparticles is an effective method to improve power generation of microbial fuel cells (MFCs). In this study, different concentrations (0.25 mg cm-2, 0.50 mg cm-2, 0.75 mg cm-2 and 1.0 mg cm-2) of TiO2 nanoparticles of size 10-25 nm were overlaid on the carbon cloth (CC) using spray pyrolysis technique and used as catalytic cathode in a dual-chambered microbial fuel cell treating distillery wastewater. Results evidenced that TiO2 nanoparticles modified cathode increased the power generation and recorded a highest power and current density of 162.5 ± 2 mW m-2 and 1.4 ± 0.005 A m-2, respectively. Carbon cloth coated with 0.50 mg cm-2 TiO2 nanoparticles showed 2.8 and 7.3 times higher current and power density as compared to uncoated cathode. MFC operated at a hydraulic retention time (HRT) and organic loading rate (OLR) of 72 h and 59.2 g COD L-1 d-1 showed a maximum chemical oxygen demand (COD) removal of 72.3% which was 15.3% higher than the control MFC. Likewise, the coulombic efficiency of control and modified MFC was 33% and 44%, respectively. The maximum NO3-- N, NO2-- N and NH4+- N removal efficiency of 77.3%, 49.9% and 59.4% were observed for TiO2 nanoparticles modified electrode which was 19.3%, 11.4% and 10.5% higher than control. TiO2 modified cathode was effective in enhancing the bioelectricity generation in MFCs.
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Affiliation(s)
- Vijay Jaswal
- Department of Environmental Science and Technology, Central University of Punjab, Bathinda, Punjab, 151401, India
| | - Rajesh Banu J
- Department of Biotechnology, Central University of Tamil Nadu, Tiruvarur, 610005, Tamil Nadu, India
| | - Yogalakshmi K N
- Department of Environmental Science and Technology, Central University of Punjab, Bathinda, Punjab, 151401, India.
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Feng J, Feng Q, Xin J, Liang Q, Li X, Chen K, Teng J, Wang S, Feng L, Liu J. Fabrication of durable self-cleaning photocatalytic coating with long-term effective natural light photocatalytic degradation performance. Chemosphere 2023; 336:139316. [PMID: 37356587 DOI: 10.1016/j.chemosphere.2023.139316] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 05/11/2023] [Revised: 06/21/2023] [Accepted: 06/22/2023] [Indexed: 06/27/2023]
Abstract
The practical application of photocatalytic coating has been greatly challenged in terms of its long-term effective natural light photocatalytic degradation due to its vulnerability and easy contamination caused by poor self-cleaning properties. In this work, photocatalytic coating with self-cleaning properties was prepared by spraying fluorinated dual-scale TiO2 on the inorganic lithium silicate adhesive, enabling excellent durability and long-term effective photocatalytic degradation performance under natural light. The coating exhibits superhydrophobic properties even after abrasion testing, acid and alkali immersion testing, and UV aging, laying a foundation for the practical use. Moreover, the coating can be applied to various substrates and its excellent self-cleaning properties make it resistant to particulate and liquid contamination that may occur in the environment. Besides, we evaluated the photocatalytic stability of the coating by subjecting it to acidic and alkaline environments and high pollution concentrations. Furthermore, benefiting from the synergistic effect of photocatalytic and self-cleaning properties, the coating achieves long-term effective photocatalytic degradation of dye wastewater under natural light, which still has a high removal rate of 95.8% for methylene blue even after 30 cycles of use. Meanwhile, due to the coating's excellent durability, the long-term quality loss rate of the coating still remained below 0.3%, which avoids the risk of secondary environmental pollution caused by nanoparticle leakage. Therefore, these excellent properties enable the coating to have a broad range of application prospects for the treatment of pollutants in water.
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Affiliation(s)
- Jinghang Feng
- School of Resources, Environment and Materials, Guangxi University, No.100, Daxue East Road, Nanning, 530004, China; Key Laboratory of Environmental Protection, Guangxi University, No.100, Daxue East Road, Nanning, 530004, China
| | - Qingge Feng
- School of Resources, Environment and Materials, Guangxi University, No.100, Daxue East Road, Nanning, 530004, China; Key Laboratory of Environmental Protection, Guangxi University, No.100, Daxue East Road, Nanning, 530004, China.
| | - Jingbo Xin
- School of Resources, Environment and Materials, Guangxi University, No.100, Daxue East Road, Nanning, 530004, China
| | - Qihua Liang
- School of Resources, Environment and Materials, Guangxi University, No.100, Daxue East Road, Nanning, 530004, China
| | - Xiang Li
- School of Resources, Environment and Materials, Guangxi University, No.100, Daxue East Road, Nanning, 530004, China; Key Laboratory of Environmental Protection, Guangxi University, No.100, Daxue East Road, Nanning, 530004, China
| | - Kao Chen
- School of Materials and Environment, Guangxi Minzu University, Nanning, 530006, China
| | - Jiayang Teng
- School of Resources, Environment and Materials, Guangxi University, No.100, Daxue East Road, Nanning, 530004, China; Key Laboratory of Environmental Protection, Guangxi University, No.100, Daxue East Road, Nanning, 530004, China
| | - Sinan Wang
- School of Resources, Environment and Materials, Guangxi University, No.100, Daxue East Road, Nanning, 530004, China; Key Laboratory of Environmental Protection, Guangxi University, No.100, Daxue East Road, Nanning, 530004, China
| | - Lin Feng
- School of Resources, Environment and Materials, Guangxi University, No.100, Daxue East Road, Nanning, 530004, China; Key Laboratory of Environmental Protection, Guangxi University, No.100, Daxue East Road, Nanning, 530004, China
| | - Junyi Liu
- School of Resources, Environment and Materials, Guangxi University, No.100, Daxue East Road, Nanning, 530004, China; Key Laboratory of Environmental Protection, Guangxi University, No.100, Daxue East Road, Nanning, 530004, China
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Zhang H, Zhang X, Xie C, Shi W, Yang P. Composite nanoarchitectonics with TiO 2 nanocrystals and superior thin Ti 3C 2T x nanosheets towards efficient NO removal. Environ Res 2023; 227:115793. [PMID: 37001850 DOI: 10.1016/j.envres.2023.115793] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 01/30/2023] [Revised: 03/14/2023] [Accepted: 03/28/2023] [Indexed: 05/08/2023]
Abstract
Accordion-like Ti3C2Tx MXene supplied a possibility to construct two-dimensional composites with novel performance. In this paper, few-layered Ti3C2Tx MXene was created via a chemical etching strategy. The oxidation in-situ using a powerful alkaline solution resulted successfully in TiO2 nanocrystals grown on Ti3C2Tx nanosheets. The alkaline treatment adjusted terminations of the Ti3C2Tx MXene and controlled the oxidation degree by changing temperature. The ratio of Ti3C2Tx and TiO2 was finally optimized. Because of Ti3C2Tx nanosheets with well conductivity and excellent light absorption as well as TiO2 nanocrystal arrays on Ti3C2Tx nanosheets with a high specific surface area and more active sites, TiO2/Ti3C2Tx composites revealed excellent photocatalystic activity, especially for NO removal. The improvement of separation and transfer efficiency of phootogenerated carriers is ascribed to the microstructure of TiO2/Ti3C2Tx composites. The composite sample synthesized at 75 °C revealed the best NO removal efficiency, in which 70% of NO was removed at a concentration of 600 ppb. This study offers a new thought for preparing high performance MXene-based photocatalysts.
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Affiliation(s)
- Hongyu Zhang
- School of Material Science and Engineering, University of Jinan, Jinan, 250022, PR China
| | - Xiao Zhang
- Faculty of Chemical Engineering and Technology, Cracow University of Technology, Krakow, Poland.
| | - Cong Xie
- School of Material Science and Engineering, University of Jinan, Jinan, 250022, PR China
| | - Wenbin Shi
- School of Material Science and Engineering, University of Jinan, Jinan, 250022, PR China
| | - Ping Yang
- School of Material Science and Engineering, University of Jinan, Jinan, 250022, PR China.
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46
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Chin JY, Ahmad AL, Low SC. Antibiotics oxytetracycline removal by photocatalyst titanium dioxide and graphitic carbon nitride in aquaculture wastewater. J Environ Manage 2023; 343:118231. [PMID: 37247545 DOI: 10.1016/j.jenvman.2023.118231] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 02/09/2023] [Revised: 05/18/2023] [Accepted: 05/20/2023] [Indexed: 05/31/2023]
Abstract
The surge in the use of antibiotics, especially in aquaculture, has led to development of antibiotic resistance genes, which will harm environmental and public health. One of the most commonly used antibiotics in aquaculture is oxytetracycline (OTC). Employing photocatalysis, this study compared OTC degradation efficiency of two different types of common photocatalysts, TiO2 and graphitic carbon nitride (GCN) in terms of their photochemical properties and underlying photocatalytic mechanism. For reference purpose, self-synthesized GCN from urea precursor (GCN-Urea) and commercial GCN (GCN-Commercial) were both examined. OTC adsorption-photocatalysis removal rates in pure OTC solution by TiO2, GCN-Urea and GCN-Commercial were attained at 95%, 60% and 40% respectively. Photochemical properties evaluated included light absorption, band gap, valence and conduction band positions, photoluminescence, cyclic voltammetry, BET surface area and adsorption capability of the photocatalysts. Through the evaluations, this study provides novel insights towards current state-of-the-art heterogeneous photocatalytic processes. The electron-hole recombination examined by photoluminescence is not the key factor influencing the photocatalytic efficacies as commonly discussed. On the contrary, the dominating factors governing the higher OTC degradation efficiency of TiO2 compared to GCN are the high mobility of electrons that leads to high redox capability and the high pollutant-photocatalyst affinity. These claims are proven by 86% and 40% more intense anodic and cathodic cyclic voltammetry curve peaks of TiO2 as compared to both GCNs. OTC also demonstrated 1.7 and 2.3 times higher affinity towards TiO2 than GCN-Urea and GCN-Commercial. OTC removal by TiO2 in real aquaculture wastewater only achieved 50%, due to significant inhibition effect by dissolved solids, dissolved organic matters and high ionic contents in the wastewater.
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Affiliation(s)
- Jing Yi Chin
- School of Chemical Engineering, Engineering Campus, Universiti Sains Malaysia, Seri Ampangan, 14300, Nibong Tebal, Pulau Pinang, Malaysia.
| | - Abdul Latif Ahmad
- School of Chemical Engineering, Engineering Campus, Universiti Sains Malaysia, Seri Ampangan, 14300, Nibong Tebal, Pulau Pinang, Malaysia.
| | - Siew Chun Low
- School of Chemical Engineering, Engineering Campus, Universiti Sains Malaysia, Seri Ampangan, 14300, Nibong Tebal, Pulau Pinang, Malaysia.
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Kaur H, Kumar S, Kaushal S, Badru R, Singh PP, Pugazhendhi A. Highly customized porous TiO 2-PANI nanoparticles with excellent photocatalytic efficiency for dye degradation. Environ Res 2023; 225:114960. [PMID: 36493807 DOI: 10.1016/j.envres.2022.114960] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 09/01/2022] [Revised: 11/16/2022] [Accepted: 11/25/2022] [Indexed: 06/17/2023]
Abstract
The present work encompasses a simple strategy to synthesize highly porous TiO2 by incorporating PANI polymer into the sol-gel chemistry of Titanium dioxide/Titanium (IV)-iso-propoxide (TiO2/TTIP). A series of TiO2 samples by varying wt.% of PANI, have been synthesized. A probable growth mechanism has been presented for the formation of a porous ginger-like nanostructure of TiO2-PANI (TP). HRTEM images reveal that the particle size range is 6-16 nm for pristine TiO2 and 5-13 nm for TP samples. XPS analysis confirms the presence of the hydrogen bonds in-between surface hydroxyl groups (Ti-OH) of TiO2 and the protonated nitrogen of PANI. UV-visible absorption study reveals a small shift towards longer wavelength for TP8 sample than that of pristine TiO2 (λmax = 314 nm) as well as reduction in Eg value from 3.02 eV to 2.89 eV. FTIR results confirm the successful interaction of PANI and TiO2. BJH and BET analysis confirms an increase of porosity in TP8 sample with an average pore volume of 0.36 cm3 g-1. High photocatalytic activity (98.77%) towards Methylene blue dye degradation is observed for TP8 sample having 8 wt% of PANI and it is explained through the combined effect of structural porosity of TiO2 and synergic effect of PANI. The Kappa value at pH 11 (0.01372 min-1) is found to be 7.84-folds higher than that of the photocatalytic reaction at pH 3 (Kappa = 0.00175 min-1). While pristine TiO2 exhibits the minimum removal efficiency (89.57%) with Kappa of 0.00756 min-1. Kappa value of catalysis reaction for TP8 is found to be almost 2-fold higher than pristine TiO2. Quantum Yield value for TP8 is found to be 3.59 × 10-4 molecules photon-1. This high Quantum Yield value of present photocatalytic system explicates the low energy consumption for the treatment of textile dye pollutant. Additionally, STY value (1.79 × 10-5 molecules photon-1 mg-1) confirms the outstanding mineralization strength of TP8 by a unit mass for high amounts of MB dye per unit time. Thus, the present study offers an excellent photocatalyst i.e., TP8 having 8 wt% of PANI for the degradation of MB dye.
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Affiliation(s)
- Harpreet Kaur
- Department of Physics, Chandigarh University, Gharuan, Mohali, 140413, India; Department of Physics, Sri Guru Granth Sahib World University, Fatehgarh Sahib, Punjab, 140407, India
| | - Sanjeev Kumar
- Department of Physics, Sri Guru Granth Sahib World University, Fatehgarh Sahib, Punjab, 140407, India
| | - Sandeep Kaushal
- Department of Chemistry, Sri Guru Granth Sahib World University, Fatehgarh Sahib, Punjab, 140407, India
| | - Rahul Badru
- Department of Chemistry, Sri Guru Granth Sahib World University, Fatehgarh Sahib, Punjab, 140407, India
| | - Prit Pal Singh
- Department of Chemistry, Sri Guru Granth Sahib World University, Fatehgarh Sahib, Punjab, 140407, India
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Xu J, Su S, Song X, Luo S, Ye S, Situ W. A simple nanocomposite photocatalyst HT-rGO/TiO 2 for deoxynivalenol degradation in liquid food. Food Chem 2023; 408:135228. [PMID: 36549161 DOI: 10.1016/j.foodchem.2022.135228] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/21/2022] [Revised: 12/14/2022] [Accepted: 12/14/2022] [Indexed: 12/23/2022]
Abstract
A simple nanocomposite photocatalyst HT-rGO/TiO2 for deoxynivalenol (DON) degradation was synthesized by hydrothermal method to maintain the quality of cereal grains and byproducts. The characterization of HT-rGO/TiO2 was analyzed by XRD, FTIR, Raman spectroscopy, and XPS. Moreover, according to UV-vis DRS analysis, HT-rGO/TiO2 had a smaller band gap, indicating a wider response range to light and a higher utilized rate of quantum photons. Additionally, the results of LC-MS showed that the hydroxyl group at the C3 position, and the unsaturated bond between C9 and C10, and the epoxy group at C12 and C13 positions of DON molecule were destroyed step by step by photocatalytic degradation. These groups have active effects on the DON toxicity, which means it is successful to degrade DON in liquid-food by HT-rGO/TiO2 photocatalyst.
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Affiliation(s)
- Juncong Xu
- College of Food Science, South China Agricultural University, Wushan, Guangzhou, GD 510640, China
| | - Shufen Su
- College of Food Science, South China Agricultural University, Wushan, Guangzhou, GD 510640, China
| | - Xianliang Song
- College of Food Science, South China Agricultural University, Wushan, Guangzhou, GD 510640, China
| | - Shucan Luo
- College of Food Science, South China Agricultural University, Wushan, Guangzhou, GD 510640, China
| | - Shengying Ye
- College of Food Science, South China Agricultural University, Wushan, Guangzhou, GD 510640, China
| | - Wenbei Situ
- College of Food Science, South China Agricultural University, Wushan, Guangzhou, GD 510640, China.
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49
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Van Thuan D, Ngo HL, Thi HP, Thu Hien CT. Photodegradation of hazardous organic pollutants using titanium oxides -based photocatalytic: A review. Environ Res 2023; 229:116000. [PMID: 37127104 DOI: 10.1016/j.envres.2023.116000] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 03/20/2023] [Revised: 04/13/2023] [Accepted: 04/25/2023] [Indexed: 05/03/2023]
Abstract
Titanium oxide-based photocatalysts (TOBPs) have been widely utilized as potential materials for numerous applications, such as wastewater treatment, water-splitting reactions, carbon dioxide (CO2) reduction and photosynthesis. However, the large bandgap of intrinsic TiO2 limits their absorption toward visible light, which is the central part of the solar spectrum, resulting in low photocatalytic activities under sunlight. To overcome this obstacle, several strategies, such as doping with either metal or non-metal elements or combining with other compounds, are efficient ways to reduce the bandgap of TiO2, leading to effectively extending their absorption toward the visible region and increasing their catalytic performance. In this review, we discussed the application of TOBPs for the photodegradation of hazardous organic pollutants in wastewater to produce quality reused water. The synthesis of TiO2 and the enhancement of photocatalytic activities of TOBPs by different techniques with detailed information were provided. Application of TOBPs for decomposing hazardous organic pollutants such as dyes, phenolic compounds and pharmaceuticals under optimum conditions have been listed. Also, the photodegradation mechanisms of hazardous organic compounds have been investigated. This work also brings ideas for future perspectives and research plan to inhibit the disadvantages and expand the application of TOBPs to remove toxic organic pollutants.
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Affiliation(s)
- Doan Van Thuan
- VKTech Research Center, NTT Hi-Tech Institute, Nguyen Tat Thanh University, Nguyen Tat Thanh Street, Ward 13, District 4, Ho Chi Minh City, Viet Nam
| | - Hoang Long Ngo
- VKTech Research Center, NTT Hi-Tech Institute, Nguyen Tat Thanh University, Nguyen Tat Thanh Street, Ward 13, District 4, Ho Chi Minh City, Viet Nam
| | - Huong Pham Thi
- Laboratory of Environmental Sciences and Climate Change, Institute for Computational Science and Artificial Intelligence, Van Lang University, Ho Chi Minh City, Viet Nam; Faculty of Environment, Van Lang University, Ho Chi Minh City, Viet Nam.
| | - Chu Thi Thu Hien
- Department of Chemistry, Faculty of Building Materials, Ha Noi University of Civil Engineering (HUCE), Giai Phong, Hai Ba Trung, Hanoi, 10000, Viet Nam.
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50
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Lei W, Wang H, Khan S, Suzuki N, Takagi K, Katsumata KI, Teshima K, Terashima C, Fujishima A. Interfacial molecular regulation of TiO 2 for enhanced and stable cocatalyst-free photocatalytic hydrogen production. J Colloid Interface Sci 2023; 645:219-226. [PMID: 37149996 DOI: 10.1016/j.jcis.2023.04.118] [Citation(s) in RCA: 4] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/14/2023] [Revised: 04/11/2023] [Accepted: 04/23/2023] [Indexed: 05/09/2023]
Abstract
On the basis of the inherent property limitations of commercial P25-TiO2, many surface interface modification methods have attracted substantial attention for further improving the photocatalytic properties. However, current strategies for designing and modifying efficient photocatalysts (which exhibit complicated manufacturing processes and harsh conditions) are not efficient for production that is low cost, is nontoxic, and exhibits good stability; and therefore restrict practical applications. Herein, a facile and reliable method is reported for in situ amine-containing silane coupling agent functionalization of commercial P25-TiO2 by covalent surface modification for constructing a highly efficient photocatalyst. As a consequence, a high efficiency of H2 evolution was achieved for TiO2-SDA with 0.95 mmol h-1 g-1 (AQE ∼45.6 % at 365 nm) under solar light irradiation without a co-catalyst. The amination modification broadens the light absorption range of the photocatalyst, inhibits the binding of photogenerated carriers, and improves the photocatalytic efficiency; which was verified by photochemical properties and DFT theoretical calculations. This covalent modification method ensures the stability of the photocatalytic reaction. This work provides an approach for molecularly modified photocatalysts to improve photocatalytic performance by covalently modifying small molecules containing amine groups on the photocatalyst surface.
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Affiliation(s)
- Wenwei Lei
- Hebei Key Laboratory of Nano-Biotechnology, School of Environmental and Chemical Engineering, Yanshan University, Qinhuangdao 066004, Hebei, China.
| | - Hongji Wang
- Hebei Key Laboratory of Nano-Biotechnology, School of Environmental and Chemical Engineering, Yanshan University, Qinhuangdao 066004, Hebei, China
| | - Sovann Khan
- International Institute for Carbon Neutral Energy Research (WPI-I2CNER), Kyushu University, Motooka 744, Nishi-ku, Fukuoka 819-0395, Japan
| | - Norihiro Suzuki
- Hebei Key Laboratory of Nano-Biotechnology, School of Environmental and Chemical Engineering, Yanshan University, Qinhuangdao 066004, Hebei, China
| | - Kai Takagi
- Research Center for Space System Innovation, Tokyo University of Science, 2641 Yamazaki, Noda, Chiba 278-8510, Japan
| | - Ken-Ichi Katsumata
- Department of Materials Science and Technology, Faculty of Advanced Engineering Industrial Science and Technology, Tokyo University of Science, 6-3-1 Niijuku, Katsushika-ku, Tokyo 125-8585, Japan
| | - Katsuya Teshima
- Research Initiative for Supra-Materials, Shinshu University, 4-17-1 Wakasato, Nagano 380-8553, Japan
| | - Chiaki Terashima
- Research Center for Space System Innovation, Tokyo University of Science, 2641 Yamazaki, Noda, Chiba 278-8510, Japan; Research Initiative for Supra-Materials, Shinshu University, 4-17-1 Wakasato, Nagano 380-8553, Japan.
| | - Akira Fujishima
- Research Center for Space System Innovation, Tokyo University of Science, 2641 Yamazaki, Noda, Chiba 278-8510, Japan
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