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Tian J, Guan C, Liu C, Fan J, Zhu Y, Sun T, Liu E. Double S-scheme Cu 2-xSe/twinned-Cd 0.5Zn 0.5S homo-heterojunctions with surface plasmon effects for efficient photocatalytic H 2 evolution. J Colloid Interface Sci 2024; 666:481-495. [PMID: 38613971 DOI: 10.1016/j.jcis.2024.04.014] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/16/2024] [Revised: 04/02/2024] [Accepted: 04/02/2024] [Indexed: 04/15/2024]
Abstract
The enhancement of charge separation and utilization efficiency in both the bulk phase and interface of semiconductor photocatalysts, as well as the expansion of light absorption range, are crucial research topics in the field of photocatalysis. To address this issue, twinned Cd0.5Zn0.5S (T-CZS) homojunctions consisting of wurtzite Cd0.5Zn0.5S (WZ-CZS) and zinc blende Cd0.5Zn0.5S (ZB-CZS) were synthesized via a hydrothermal method to facilitate the bulk-phase charge separation. Meanwhile, Cu2-xSe with localized surface plasmon resonance effect (LSPR) generated by Cu vacancies was also obtained through a hydrothermal process. Due to their opposite electronegativity, a solvent evaporation strategy was employed to combine Cu2-xSe and T-CZS by intermolecular electrostatic. After optimization, the photocatalytic hydrogen (H2) evolution rate of 5 wt% Cu2-xSe/T-CZS reached an impressive value of 60 mmol∙h-1∙g-1, which was 4.6 and 66.6 times higher than that of pure Cu2-xSe and T-CZS, respectively. Furthermore, this composites demonstrated a remarkable rate of 0.46 mmol∙h-1∙g-1 under near-infrared (NIR) wavelength (>800 nm). The enhanced performance observed in Cu2-xSe/T-CZS can be attributed to its unique and efficient double S-scheme charge transfer mechanism which effectively suppresses rapid recombination of electron-hole pairs both within the bulk phase and at the surface interfaces; this conclusion is supported by Density Functional Theory (DFT) calculations as well as electron paramagnetic resonance spectroscopy analysis. Moreover, incorporation of Cu2-xSe enables effective utilization ultraviolet visible-near infrared (UV-Vis-NIR) light by the composites while facilitating injection "hot electrons" into T-CZS for promoting photocatalytic reactions. This study provides a potential strategy for achieving efficient solar energy conversion through synergistic integration of non-stoichiometric plasmonic materials with photocatalysts with twinned-twinned structures.
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Affiliation(s)
- Jingzhuo Tian
- School of Chemical Engineering/Xi'an Key Laboratory of Special Energy Materials, Northwest University, Xi'an 710069, PR China; Shaanxi Key Laboratory for Carbon Neutral Technology, Xi'an 710069, PR China
| | - Chaohong Guan
- University of Michigan-Shanghai Jiao Tong University Joint Institute, Shanghai Jiao Tong University, Shanghai 200240, PR China
| | - Chao Liu
- School of Materials Science and Engineering, Yancheng Institute of Technology, Yancheng 224051, PR China
| | - Jun Fan
- School of Chemical Engineering/Xi'an Key Laboratory of Special Energy Materials, Northwest University, Xi'an 710069, PR China
| | - Yonghong Zhu
- School of Chemical Engineering/Xi'an Key Laboratory of Special Energy Materials, Northwest University, Xi'an 710069, PR China.
| | - Tao Sun
- School of Chemical Engineering/Xi'an Key Laboratory of Special Energy Materials, Northwest University, Xi'an 710069, PR China; Shaanxi Key Laboratory for Carbon Neutral Technology, Xi'an 710069, PR China.
| | - Enzhou Liu
- School of Chemical Engineering/Xi'an Key Laboratory of Special Energy Materials, Northwest University, Xi'an 710069, PR China; Shaanxi Key Laboratory for Carbon Neutral Technology, Xi'an 710069, PR China.
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Nemamcha HE, Vu NN, Tran DS, Boisvert C, Nguyen DD, Nguyen-Tri P. Recent progression in MXene-based catalysts for emerging photocatalytic applications of CO 2 reduction and H 2 production: A review. THE SCIENCE OF THE TOTAL ENVIRONMENT 2024; 931:172816. [PMID: 38679090 DOI: 10.1016/j.scitotenv.2024.172816] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 02/29/2024] [Revised: 04/23/2024] [Accepted: 04/25/2024] [Indexed: 05/01/2024]
Abstract
The development of advanced materials for efficient photocatalytic H2 production and CO2 reduction is highly recommended for addressing environmental issues and producing clean energy sources. Specifically, MXenes have emerged as two-dimensional (2D) materials extensively used as high-performance cocatalysts in photocatalyst systems owing to their outstanding features of structure and properties such as high conductivity, large specific surface area, and abundant active sites. Nevertheless, there is a lack of deep and systematic studies concerning the application of these emerging materials for CO2 reduction reaction (CRR) and H2 production (HER). This review first outlines the essential features of MXenes, encompassing the synthesis methods, composition, surface terminations, and electronic properties, which make them highly active as cocatalysts. It then examines the recent progress in MXene-based photocatalysts, emphasizing the synergy achieved by coupling MXenes as co-catalysts with semiconductors, utilizing MXenes as a support for the consistent growth of photocatalysts, leading to finely dispersed nanoparticles, and exploiting MXene as exceptional precursors for creating MXene/metal oxide photocomposite. The roles of engineering surface terminations of MXene cocatalysts, MXene quantum dots (QDs), and distinctive morphologies in MXenes-based photocatalyst systems to enhance photocatalytic activity for both HER and CRR have been explored both experimentally and theoretically using DFT calculations. Challenges and prospects for MXene-based photocatalysts are also addressed. Finally, suggestions for further research and development of effective and economical MXenes/semiconductors strategies are proposed. This comprehensive review article serves as a valuable reference for researchers for applying MXenes in photocatalysis.
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Affiliation(s)
- Houssam-Eddine Nemamcha
- Department of Chemistry, Biochemistry, and Physics, Université du Québec à Trois-Rivières (UQTR), 3351 Boulevard des Forges, Trois-Rivières, QC G8Z 4M3, Canada; Laboratory of Advanced Materials for Energy and Environment, Université du Québec à Trois-Rivières (UQTR), 3351 Boulevard des Forges, Trois-Rivières, QC G8Z 4M3, Canada
| | - Nhu-Nang Vu
- Department of Chemistry, Biochemistry, and Physics, Université du Québec à Trois-Rivières (UQTR), 3351 Boulevard des Forges, Trois-Rivières, QC G8Z 4M3, Canada; Laboratory of Advanced Materials for Energy and Environment, Université du Québec à Trois-Rivières (UQTR), 3351 Boulevard des Forges, Trois-Rivières, QC G8Z 4M3, Canada
| | - D Son Tran
- Department of Chemistry, Biochemistry, and Physics, Université du Québec à Trois-Rivières (UQTR), 3351 Boulevard des Forges, Trois-Rivières, QC G8Z 4M3, Canada; Laboratory of Advanced Materials for Energy and Environment, Université du Québec à Trois-Rivières (UQTR), 3351 Boulevard des Forges, Trois-Rivières, QC G8Z 4M3, Canada
| | - Cédrik Boisvert
- Department of Chemistry, Biochemistry, and Physics, Université du Québec à Trois-Rivières (UQTR), 3351 Boulevard des Forges, Trois-Rivières, QC G8Z 4M3, Canada; Laboratory of Advanced Materials for Energy and Environment, Université du Québec à Trois-Rivières (UQTR), 3351 Boulevard des Forges, Trois-Rivières, QC G8Z 4M3, Canada
| | - D Duc Nguyen
- Department of Civil & Energy System Engineering, Kyonggi University, Suwon 16227, South Korea; Institute of Applied Technology and Sustainable Development, Nguyen Tat Thanh University, Ho Chi Minh City 700000, Viet Nam.
| | - Phuong Nguyen-Tri
- Department of Chemistry, Biochemistry, and Physics, Université du Québec à Trois-Rivières (UQTR), 3351 Boulevard des Forges, Trois-Rivières, QC G8Z 4M3, Canada; Laboratory of Advanced Materials for Energy and Environment, Université du Québec à Trois-Rivières (UQTR), 3351 Boulevard des Forges, Trois-Rivières, QC G8Z 4M3, Canada.
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Guo L, Liu YL, Zeng Q, Zhang C, Wen Y, Zhang Q, Tang G, Zhang Q, Zeng Q. A self-driven solar coupling system with TiO 2@MXene cathode for effectively eliminating uranium and organics from complex wastewater accompanying with electricity generation. JOURNAL OF HAZARDOUS MATERIALS 2024; 465:133415. [PMID: 38185087 DOI: 10.1016/j.jhazmat.2023.133415] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 10/03/2023] [Revised: 12/16/2023] [Accepted: 12/29/2023] [Indexed: 01/09/2024]
Abstract
The inevitable organic matters in radioactive wastewater and contaminated waters pose great challenge in uranium recycling by traditional techniques. Here, a self-driven solar coupling system (SSCS), which was assembled by a TiO2 @MXene/CF cathode and a monolithic photoanode, was proposed for synergistically recycling uranium and degrading organics from complex radioactive wastewater, combining with electricity production. The TiO2 @MXene/CF was prepared via a simple annealing process with in-situ derived TiO2 nanoparticles decorated Ti3C2 MXene coated on carbon felt (CF). Under sunlight illumination, the photoanode captured electrons of organics, and drove electrons to the TiO2 @MXene/CF, which exhibited an exceptional UO22+ adsorption and reduction capacity because TiO2 nanoparticles provided plenty of surface hydroxyl groups for UO22+ adsorption, and the unique two-dimensional MXene facilitated the charge transfer. The SSCS with TiO2 @MXene/CF removed almost 100% UO22+ and organics with rate constants of ∼21 and ∼6.9 times those of the system with CF, accompanying with excellent power output (∼1000 μW·cm-2). The fixed uranium on TiO2 @MXene/CF was effectively reduced into insoluble UO2 (91.1%), and no obvious decay was observed after 15 repeated uses. This study proposes a multi-functional and easy-operated way for remediating radioactive wastewater and contaminated waters, and gives valuable insights in designing cathode materials for uranium reduction.
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Affiliation(s)
- Lulin Guo
- School of Resources & Environment and Safety Engineering, University of South China, Hengyang, Hunan 421001, China
| | - Yi-Lin Liu
- School of Resources & Environment and Safety Engineering, University of South China, Hengyang, Hunan 421001, China; School of Mechanical Engineering, University of South China, Hengyang, Hunan 421001, China.
| | - Qingming Zeng
- School of Resources & Environment and Safety Engineering, University of South China, Hengyang, Hunan 421001, China
| | - Chao Zhang
- School of Resources & Environment and Safety Engineering, University of South China, Hengyang, Hunan 421001, China
| | - Yanjun Wen
- School of Resources & Environment and Safety Engineering, University of South China, Hengyang, Hunan 421001, China
| | - Qingyan Zhang
- School of Resources & Environment and Safety Engineering, University of South China, Hengyang, Hunan 421001, China
| | - Guolong Tang
- School of Resources & Environment and Safety Engineering, University of South China, Hengyang, Hunan 421001, China; School of Mechanical and Electrical Engineering, Qingdao Qiushi College, Qingdao, Shandong 266108, China
| | - Qingsong Zhang
- School of Resources & Environment and Safety Engineering, University of South China, Hengyang, Hunan 421001, China
| | - Qingyi Zeng
- School of Resources & Environment and Safety Engineering, University of South China, Hengyang, Hunan 421001, China.
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Zhang LS, Cao XS, Yang Y, Ye Z, Wu JM. A H 2O 2 Oxidation Approach to Ti 3C 2/TiO 2 for Efficient Photocatalytic Removal of Distinct Organic Pollutants in Water. LANGMUIR : THE ACS JOURNAL OF SURFACES AND COLLOIDS 2024; 40:4424-4433. [PMID: 38368593 DOI: 10.1021/acs.langmuir.3c03754] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 02/19/2024]
Abstract
To develop versatile photocatalysts for efficient degradation of distinct organic pollutants in water is a continuous pursuit in environment remediation. Herein, we directly oxidize Ti3C2 MXene with hydrogen peroxide to produce C-doped anatase TiO2 nanowires with aggregates maintaining a layered architecture of the MXene. The Ti3C2 MXene provides a titanium source for TiO2, a carbon source for in situ C-doping, and templates for nanowire aggregates. Under UV light illumination, the optimized Ti3C2/TiO2 exhibits a reaction rate constant 1.5 times that of the benchmark P25 TiO2 nanoparticles, toward photocatalytic degradations of trace phenol in water. The mechanism study suggests that photogenerated holes play key roles on the phenol degradation, either directly oxidizing phenol molecules or in an indirect way through oxidizing first the surface hydroxyl groups. The unreacted Ti3C2 MXene, although with trace amounts, is supposed to facilitate electron transfer, which inhibits charge recombination. The unique nanostructure of layered aggregates of nanowires, abundant surface oxygen vacancies arising from the carbon doping, and probably the Ti3C2/TiO2 heterojunction guarantee the high photocatalytic efficiency toward removals of organic pollutants in water. The photocatalyst also exhibits an activity superior to, or at least comparable to, the benchmark P25 TiO2 toward photodegradations for typical persistent organic pollutants of phenol, dye molecule of rhodamine B, antibiotic of tetracycline, pharmaceutical wastewater of ofloxacin, and pesticide of N,N-dimethylformamide, when evaluated in total organic carbon removal.
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Affiliation(s)
- Li-Sha Zhang
- School of Materials Science and Engineering, Zhejiang Sci-Tech University, Hangzhou 310018, PR China
- Zhejiang Provincial Engineering Research Center of Oxide Semiconductors for Environmental and Optoelectronic Applications, Institute of Wenzhou, Zhejiang University, Wenzhou 325006, PR China
| | - Xu-Sheng Cao
- Zhejiang Provincial Engineering Research Center of Oxide Semiconductors for Environmental and Optoelectronic Applications, Institute of Wenzhou, Zhejiang University, Wenzhou 325006, PR China
| | - Yefeng Yang
- School of Materials Science and Engineering, Zhejiang Sci-Tech University, Hangzhou 310018, PR China
- Zhejiang Provincial Engineering Research Center of Oxide Semiconductors for Environmental and Optoelectronic Applications, Institute of Wenzhou, Zhejiang University, Wenzhou 325006, PR China
- Shanxi-Zheda Institute of Advanced Materials and Chemical Engineering, Zhejiang University, Hangzhou 310027, PR China
| | - Zhizhen Ye
- Zhejiang Provincial Engineering Research Center of Oxide Semiconductors for Environmental and Optoelectronic Applications, Institute of Wenzhou, Zhejiang University, Wenzhou 325006, PR China
- Shanxi-Zheda Institute of Advanced Materials and Chemical Engineering, Zhejiang University, Hangzhou 310027, PR China
- State Key Laboratory of Silicon and Advanced Semiconductor Materials, School of Materials Science and Engineering, Zhejiang University, Hangzhou 310027, PR China
| | - Jin-Ming Wu
- Zhejiang Provincial Engineering Research Center of Oxide Semiconductors for Environmental and Optoelectronic Applications, Institute of Wenzhou, Zhejiang University, Wenzhou 325006, PR China
- Shanxi-Zheda Institute of Advanced Materials and Chemical Engineering, Zhejiang University, Hangzhou 310027, PR China
- State Key Laboratory of Silicon and Advanced Semiconductor Materials, School of Materials Science and Engineering, Zhejiang University, Hangzhou 310027, PR China
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Wu S, Ou K, Zhang W, Ni Y, Xia Y, Wang H. TiO 2nanorod arrays/Ti 3C 2T xMXene nanosheet composites with efficient photocatalytic activity. NANOTECHNOLOGY 2024; 35:155705. [PMID: 38176072 DOI: 10.1088/1361-6528/ad1afb] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 09/04/2023] [Accepted: 01/04/2024] [Indexed: 01/06/2024]
Abstract
Semiconductor photocatalysis holds significant promise in addressing both environmental and energy challenges. However, a major hurdle in photocatalytic processes remains the efficient separation of photoinduced charge carriers. In this study, TiO2nanorod arrays were employed by glancing angle deposition technique, onto which Ti3C2TxMXene was deposited through a spin-coating process. This hybrid approach aims to amplify the photocatalytic efficacy of TiO2nanorod arrays. Through photocurrent efficiency characterization testing, an optimal loading of TiO2/Ti3C2Txcomposites is identified. Remarkably, this composite exhibits a 40% increase in photocurrent density in comparison to pristine TiO2. This enhancement is attributed to the exceptional electrical conductivity and expansive specific surface area inherent to Ti3C2TxMXene. These attributes facilitate swift transport of photoinduced electrons, consequently refining the separation and migration of electron-hole pairs. The synergistic TiO2/Ti3C2Txcomposite showcases its potential across various domains including photoelectrochemical water splitting and diverse photocatalytic devices. As such, this composite material stands as a novel and promising entity for advancing photocatalytic applications. This study can offer an innovative approach for designing simple and efficient photocatalytic materials composed of MXene co-catalysts and TiO2for efficient water electrolysis on semiconductors.
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Affiliation(s)
- Shujun Wu
- School of Physical Science and Technology, Southwest Jiaotong University, Chengdu 610031, Sichuan, People's Republic of China
| | - Kai Ou
- School of Physical Science and Technology, Southwest Jiaotong University, Chengdu 610031, Sichuan, People's Republic of China
| | - Wenting Zhang
- School of Physical Science and Technology, Southwest Jiaotong University, Chengdu 610031, Sichuan, People's Republic of China
| | - Yuxiang Ni
- School of Physical Science and Technology, Southwest Jiaotong University, Chengdu 610031, Sichuan, People's Republic of China
| | - Yudong Xia
- School of Physical Science and Technology, Southwest Jiaotong University, Chengdu 610031, Sichuan, People's Republic of China
| | - Hongyan Wang
- School of Physical Science and Technology, Southwest Jiaotong University, Chengdu 610031, Sichuan, People's Republic of China
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6
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Stepanova A, Tite T, Ivanenko I, Enculescu M, Radu C, Culita DC, Rostas AM, Galca AC. TiO 2 Phase Ratio's Contribution to the Photocatalytic Activity. ACS OMEGA 2023; 8:41664-41673. [PMID: 37970036 PMCID: PMC10634250 DOI: 10.1021/acsomega.3c05890] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 08/10/2023] [Revised: 10/06/2023] [Accepted: 10/10/2023] [Indexed: 11/17/2023]
Abstract
Photocatalysis is one of the approaches for solving environmental issues derived from extremely harmful pollution caused by industrial dyes, medicine, and heavy metals. Titanium dioxide is among the most promising photocatalytic semiconductors; thus, in this work, TiO2 powders were prepared by a hydrothermal synthesis using titanium tetrachloride TiCl4 as a Ti source. The effect of the hydrochloric acid (HCl) concentration on TiO2 formation was analyzed, in which a thorough morpho-structural analysis was performed employing different analysis methods like XRD, Raman spectroscopy, SEM/TEM, and N2 physisorption. EPR spectroscopy was employed to characterize the paramagnetic defect centers and the photogeneration of reactive oxygen species. Photocatalytic properties were tested by photocatalytic degradation of the rhodamine B (RhB) dye under UV light irradiation and using a solar simulator. The pH value directly influenced the formation of the TiO2 phases; for less acidic conditions, the anatase phase of TiO2 crystallized, with a crystallite size of ≈9 nm. Promising results were observed for TiO2, which contained 76% rutile, showing a 96% degradation of RhB under the solar simulator and 91% under UV light after 90 min irradiation, and the best result showed that the sample with 67% of the anatase phase after 60 min irradiation under the solar simulator had a 99% degradation efficiency.
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Affiliation(s)
- Anna Stepanova
- National
Institute of Materials Physics, Magurele 077125, Romania
| | - Teddy Tite
- National
Institute of Materials Physics, Magurele 077125, Romania
| | - Iryna Ivanenko
- National
Technical University of Ukraine Igor Sikorsky Kyiv Polytechnic Institute, Kyiv 03056, Ukraine
| | - Monica Enculescu
- National
Institute of Materials Physics, Magurele 077125, Romania
| | - Cristian Radu
- National
Institute of Materials Physics, Magurele 077125, Romania
| | - Daniela Cristina Culita
- Institute
of Physical Chemistry Ilie Murgulescu, Romanian Academy, Bucharest 060021, Romania
| | - Arpad Mihai Rostas
- National
Institute of Isotopic and Molecular Technologies, Cluj-Napoca 400293, Romania
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Meng X, Wang L, Wang X, Zhen M, Hu Z, Guo SQ, Shen B. Recent developments and perspectives of MXene-Based heterostructures in photocatalysis. CHEMOSPHERE 2023; 338:139550. [PMID: 37467848 DOI: 10.1016/j.chemosphere.2023.139550] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 05/18/2023] [Revised: 07/10/2023] [Accepted: 07/16/2023] [Indexed: 07/21/2023]
Abstract
Energy crises and environmental degradation are serious in recent years. Inexhaustible solar energy can be used for photocatalytic hydrogen production or CO2 reduction to reduce CO2 emissions. At present, the development of efficient photocatalysts is imminent. MXene as new two-dimensional (2D) layered material, has been used in various fields in recent years. Based on its high conductivity, adjustable band gap structure and sizable specific surface area, the MXene is beneficial to hasten the separation and reduce the combination of photoelectron-hole pairs in photocatalysis. Nevertheless, the re-stacking of layers because of the strong van der Waals force and hydrogen bonding interactions seriously hinder the development of MXene material as photocatalysts. By contrast, the MXene-based heterostructures composed of MXene nanosheets and other materials not only effectively suppress the re-stacking of layers, but also show the superior synergistic effects in photocatalysis. Herein, the recent progress of the MXene-based heterostructures as photocatalysts in energy and environment fields is summarized in this review. Particularly, new synthetic strategies, morphologies, structures, and mechanisms of MXene-based heterostructures are highlighted in hydrogen production, CO2 reduction, and pollutant degradation. In addition, the structure-activity relationship between the synthesis strategy, components, morphology and structure of MXene-based heterostructures, and their photocatalytic properties are elaborated in detail. Finally, a summary and the perspectives on improving the application study of the heterostructures in photocatalysis are presented.
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Affiliation(s)
- Xinyan Meng
- Tianjin Key Laboratory of Clean Energy and Pollution Control, School of Energy and Environmental Engineering, Hebei University of Technology, Tianjin, 300401, China
| | - Lufei Wang
- Tianjin Key Laboratory of Clean Energy and Pollution Control, School of Energy and Environmental Engineering, Hebei University of Technology, Tianjin, 300401, China
| | - Xiaoyu Wang
- Tianjin Key Laboratory of Clean Energy and Pollution Control, School of Energy and Environmental Engineering, Hebei University of Technology, Tianjin, 300401, China
| | - Mengmeng Zhen
- Tianjin Key Laboratory of Clean Energy and Pollution Control, School of Energy and Environmental Engineering, Hebei University of Technology, Tianjin, 300401, China.
| | - Zhenzhong Hu
- Tianjin Key Laboratory of Clean Energy and Pollution Control, School of Energy and Environmental Engineering, Hebei University of Technology, Tianjin, 300401, China.
| | - Sheng-Qi Guo
- Tianjin Key Laboratory of Clean Energy and Pollution Control, School of Energy and Environmental Engineering, Hebei University of Technology, Tianjin, 300401, China
| | - Boxiong Shen
- Tianjin Key Laboratory of Clean Energy and Pollution Control, School of Energy and Environmental Engineering, Hebei University of Technology, Tianjin, 300401, China
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Batool K, Rani M, Rasool F, Karami AM, Sillanpää M, Shafique R, Akram M, Sohail A. Multinary nanocomposite of GO@SrO@CoCrO 3@FeCr 2O 4@SnO 2@SiO 2 for superior electrochemical performance and water purification applications. Heliyon 2023; 9:e20675. [PMID: 37842602 PMCID: PMC10569995 DOI: 10.1016/j.heliyon.2023.e20675] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/24/2023] [Revised: 09/26/2023] [Accepted: 10/04/2023] [Indexed: 10/17/2023] Open
Abstract
Novel multinary nanocomposite using solvothermal method synthesized and studied for their use in supercapacitors and photocatalysis to degrade pollutants using characterization techniques XRD, SEM, EDX, FTIR, Raman, UV-Vis, Zeta potential and photoluminescence spectroscopy whereas electrochemical testing via EIS, CV and GCD analysis. Average crystalline size of 20.81 nm measured from XRD whereas EDX confirms GO suppression within nanocomposite. Mixed matrix like morphology is observable from SEM micrographs. The composite exhibited a band gap of 2.78 eV that could degrade MB dye at 94 % under direct sunlight consistent with first-order kinetics. Multiple distinctive peaks in FTIR spectra indicates various functional groups exsistence in the material alongwith zeta potential value of -17.9 mV. Raman spectra reveals D-band shifting to value 1361 cm-1 while the G-band shifts to 1598 cm-1 relative to GO. Furthermore electrochemical performance evaluated revealing electron transfer rate value 4.88 × 10-9 cms-1 with maximum capacitance about 7182 Fg-1 at a scan rate of 10 mVs-1 respectively. Power density ranges from 3591.18 to 2163 W/kg and energy density from 299 to 120 Wh/Kg as measured from GCD analysis. These findings indicates that novel multinary nanocomposite holds potential as an electrode material in supercapacitors and as a sunlight-driven photocatalyst for the degradation of water-borne organic pollutants.
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Affiliation(s)
- Kiran Batool
- Department of Physics, The Women University, P.O. Box 66000, Multan, Pakistan
| | - Malika Rani
- Department of Physics, The Women University, P.O. Box 66000, Multan, Pakistan
| | - Faisal Rasool
- Department of Chemistry, Khalifa University of Science and Technology, Abu Dhabi, 127788, United Arab Emirates
| | - Abdulnasser M. Karami
- Department of Chemistry, College of Science, King Saud University, P.O. Box 2455, Riyadh, 11451, Saudi Arabia
| | - Mika Sillanpää
- Department of Biological and Chemical Engineering, Aarhus University, Norrebrogade 44, 8000, Aarhus C, Denmark
| | - Rubia Shafique
- Department of Physics, The Women University, P.O. Box 66000, Multan, Pakistan
| | - Mariam Akram
- Department of Physics, The Women University, P.O. Box 66000, Multan, Pakistan
| | - Amir Sohail
- Department of Chemistry, University of Otago, Dunedin, 9016, New Zealand
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Yang J, Chang X, Wei F, Lv Z, Liu H, Li Z, Wu W, Qian L. High performance photocatalyst TiO 2@UiO-66 applied to degradation of methyl orange. DISCOVER NANO 2023; 18:112. [PMID: 37695406 PMCID: PMC10495301 DOI: 10.1186/s11671-023-03894-6] [Citation(s) in RCA: 1] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 08/03/2023] [Accepted: 08/31/2023] [Indexed: 09/12/2023]
Abstract
MOFs have considerable adsorption capacity due to their huge specific surface area. They have the characteristics of photocatalysts for their organic ligands can absorb photons and produce electrons. In this paper, the photodegradation properties of TiO2 composites loaded with UiO-66 were investigated for the first time for MO. A series of TiO2@UiO-66 composites with different contents of TiO2 were prepared by a solvothermal method. The photocatalytic degradation of methyl orange (MO) was performed using a high-pressure mercury lamp as the UV light source. The effects of TiO2 loading, catalyst dosage, pH value, and MO concentration were investigated. The results showed that the degradation of MO by TiO2@UiO-66 could reach 97.59% with the addition of only a small amount of TiO2 (5 wt%). TiO2@UiO-66 exhibited significantly enhanced photoelectron transfer capability and inhibited efficient electron-hole recombination compared to pure TiO2 in MO degradation. The composite catalyst indicated good stability and reusability when they were recycled three times, and the photocatalytic reaction efficiencies were 92.54%, 88.76%, and 86.90%. The results provide a new option to design stable, high-efficiency MOF-based photocatalysts.
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Affiliation(s)
- Jingyi Yang
- School of Nuclear Science and Technology, Lanzhou University, Lanzhou, 73000, People's Republic of China
| | - Xue Chang
- School of Nuclear Science and Technology, Lanzhou University, Lanzhou, 73000, People's Republic of China
| | - Fang Wei
- School of Nuclear Science and Technology, Lanzhou University, Lanzhou, 73000, People's Republic of China
| | - Zixiao Lv
- School of Nuclear Science and Technology, Lanzhou University, Lanzhou, 73000, People's Republic of China
| | - Huiling Liu
- School of Nuclear Science and Technology, Lanzhou University, Lanzhou, 73000, People's Republic of China
| | - Zhan Li
- School of Nuclear Science and Technology, Lanzhou University, Lanzhou, 73000, People's Republic of China.
- Frontiers Science Center for Rare Isotopes, Lanzhou University, Lanzhou, 730000, China.
| | - Wangsuo Wu
- School of Nuclear Science and Technology, Lanzhou University, Lanzhou, 73000, People's Republic of China
- Key Laboratory of Special Function Materials and Structure Design, Ministry of Education, Lanzhou, 730000, Gansu, China
| | - Lijuan Qian
- School of Nuclear Science and Technology, Lanzhou University, Lanzhou, 73000, People's Republic of China.
- Key Laboratory of Special Function Materials and Structure Design, Ministry of Education, Lanzhou, 730000, Gansu, China.
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10
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Wei H, Yang L, Pang C, Lian L, Hong L. Bacteria-targeted photothermal therapy for combating drug-resistant bacterial infections. Biomater Sci 2023; 11:5634-5640. [PMID: 37404189 DOI: 10.1039/d3bm00841j] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 07/06/2023]
Abstract
Photothermal therapy is an ideal non-invasive treatment for bacterial infections. However, if photothermal agents are unable to target bacteria, they can also cause thermal damage to healthy tissue. This study describes the fabrication of a Ti3C2Tx MXene-based photothermal nanobactericide (denoted as MPP) that targets bacteria by modifying MXene nanosheets with polydopamine and the bacterial recognition peptide CAEKA. The polydopamine layer blunts the sharp edges of MXene nanosheets, preventing their damage to normal tissue cells. Furthermore, as a constituent of peptidoglycan, CAEKA can recognize and penetrate the bacterial cell membrane based on similar compatibility. The obtained MPP exhibits superior antibacterial activity and high cytocompatibility compared to the pristine MXene nanosheets. In vivo studies showed that MPP colloidal solution under 808 nm NIR light can effectively treat a subcutaneous abscess caused by multi-drug resistant bacterial infection without adverse effects.
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Affiliation(s)
- Hongxin Wei
- Faculty of Materials Science and Engineering, South China University of Technology, Guangzhou 510640, P. R. China.
| | - Liu Yang
- School of Food Science and Engineering, South China University of Technology, Guangzhou 510640, P. R. China
| | - Chuming Pang
- Faculty of Materials Science and Engineering, South China University of Technology, Guangzhou 510640, P. R. China.
| | - Liqin Lian
- Faculty of Materials Science and Engineering, South China University of Technology, Guangzhou 510640, P. R. China.
| | - Liangzhi Hong
- Faculty of Materials Science and Engineering, South China University of Technology, Guangzhou 510640, P. R. China.
- Guangdong Provincial Key Laboratory of Luminescence from Molecular Aggregates, South China University of Technology, Guangzhou 510640, P. R. China
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11
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Wu H, Quan Y, Liu M, Tian X, Ren C, Wang Z. Synthesis of AgBr/Ti 3C 2@TiO 2 ternary composite for photocatalytic dehydrogenation of 1,4-dihydropyridine and photocatalytic degradation of tetracycline hydrochloride. RSC Adv 2023; 13:21754-21768. [PMID: 37476041 PMCID: PMC10354501 DOI: 10.1039/d3ra02164e] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/02/2023] [Accepted: 07/10/2023] [Indexed: 07/22/2023] Open
Abstract
In this work, AgBr/Ti3C2@TiO2 ternary composite photocatalyst was prepared by a solvothermal and precipitation method with the aims of introducing Ti3C2 as a cocatalyst and TiO2 as a compositing semiconductor. The crystal structure, morphology, elemental state, functional groups and photoelectrochemical properties were studied by XRD, SEM, TEM, XPS, FI-IR and EIS. The photocatalytic performances of the composites were investigated by the photodehydrogenation of diethyl 1,4-dihydro-2,6-dimethyl-3,5-pyridinedicarboxylate (1,4-DHP) and the photodegradation of tetracycline hydrochloride (TCH) under visible light irradiation (λ > 400 nm). The AgBr/Ti3C2@TiO2 composite photocatalyst showed enhanced photocatalytic performance in both photocatalytic reactions. The photocatalytic activity of the composite photocatalyst is dependent on the proportional content of Ti3C2@TiO2. With optimized Ti3C2@TiO2 proportion, the photocatalytic ability of the AgBr/Ti3C2@TiO2 composite was 24.5 times as high as that of Ti3C2@TiO2 for photodehydrogenation of 1,4-DHP and 1.9 times as high as that of pure AgBr for photodegradation of TCH. The enhanced photocatalytic performance of the AgBr/Ti3C2@TiO2 composite should be due to the formation of a p-n heterojunction structure between AgBr and Ti3C2@TiO2 and the excellent electronic properties of Ti3C2, which enhanced the visible light absorption capacity, lowered the internal resistance, speeded up the charge transfer and reduced the recombination efficiency of photo-generated carriers. Mechanism studies showed that superoxide free radical (˙O2-) was the main active species. In addition, the composite photocatalyst also displayed good stability, indicating its reutilization in practical application.
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Affiliation(s)
- Hanliu Wu
- Chemical Synthesis and Pollution Control Key Laboratory of Sichuan Province, College of Chemistry and Chemical Engineering, China West Normal University Nanchong 637002 Sichuan China +86 817-2568081 +86 817-2445233
| | - Yan Quan
- Chemical Synthesis and Pollution Control Key Laboratory of Sichuan Province, College of Chemistry and Chemical Engineering, China West Normal University Nanchong 637002 Sichuan China +86 817-2568081 +86 817-2445233
| | - Meiling Liu
- Chemical Synthesis and Pollution Control Key Laboratory of Sichuan Province, College of Chemistry and Chemical Engineering, China West Normal University Nanchong 637002 Sichuan China +86 817-2568081 +86 817-2445233
| | - Xuemei Tian
- Chemical Synthesis and Pollution Control Key Laboratory of Sichuan Province, College of Chemistry and Chemical Engineering, China West Normal University Nanchong 637002 Sichuan China +86 817-2568081 +86 817-2445233
| | - Chunguang Ren
- College of Life Sciences, Yantai University Yantai 264005 China
| | - Zhonghua Wang
- Chemical Synthesis and Pollution Control Key Laboratory of Sichuan Province, College of Chemistry and Chemical Engineering, China West Normal University Nanchong 637002 Sichuan China +86 817-2568081 +86 817-2445233
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12
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Zhan Y, Chen X, Sun A, Jia H, Liu Y, Li L, Chiao YH, Yang X, Zhu F. Design and assembly of Ag-decorated Bi 2O 3 @ 3D MXene Schottky heterojunction for the highly permeable and multiple-antifouling of fibrous membrane in the purification of complex emulsified oil pollutants. JOURNAL OF HAZARDOUS MATERIALS 2023; 458:131965. [PMID: 37437482 DOI: 10.1016/j.jhazmat.2023.131965] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 05/18/2023] [Revised: 06/21/2023] [Accepted: 06/27/2023] [Indexed: 07/14/2023]
Abstract
Membrane separation technology has potential for purifying emulsified oily wastewater. However, the oils, soluble organic substances, and microorganisms can cause complex membrane fouling problems, thereby reducing the separation efficiency and service life. Herein, a highly permeable and multiple-antifouling composite membrane was prepared using porous PAN fibrous mat as support backbone for the assembly of Ag-decorated Bi2O3 @ 3D MXene Schottky heterojunction and hydrophilic TA as the adhesive. The unique arrangement of 3D MXene heterojunction and hydrophilic functionalization effectively broke through the limitation of separation flux and synergistically enhanced the anti-fouling performance of membrane. Such fibrous composite membrane achieved an exceedingly high permeability (2717-3328 L·m-2·h-1) for various emulsified oils, while ensuring excellent oil/water emulsion retention rate (99.59%) and good cycle stability. Meanwhile, the composite membrane displayed favorable photocatalytic degradation performance toward degrading MeB (96.1%) and antibacterial ability. Furthermore, the MD simulation and free radical trapping experiments were carried out to unravel the molecular interactions during the separation process and the photocatalytic mechanism of composite membrane, respectively. Overall, the combination of photocatalytic self-cleaning, anti-oil adhesion, and antibacterial effect renders the membrane high permeability and multiple-antifouling performance, which provides a new strategy for dealing with complex oily wastewater in petrochemical industry.
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Affiliation(s)
- Yingqing Zhan
- College of Chemistry and Chemical Engineering, Southwest Petroleum University, 8 Xindu Avenue, Chengdu, Sichuan 610500, PR China; State Key Lab of Oil and Gas Reservoir Geology and Exploitation, Southwest Petroleum University, 8 Xindu Avenue, Chengdu, Sichuan 610500, PR China; Research Institute of Industrial Hazardous Waste Disposal and Resource Utilization, Southwest Petroleum University, Chengdu, Sichuan 610500, PR China.
| | - Ximin Chen
- College of Chemistry and Chemical Engineering, Southwest Petroleum University, 8 Xindu Avenue, Chengdu, Sichuan 610500, PR China; Research Institute of Industrial Hazardous Waste Disposal and Resource Utilization, Southwest Petroleum University, Chengdu, Sichuan 610500, PR China
| | - Ao Sun
- College of Chemistry and Chemical Engineering, Southwest Petroleum University, 8 Xindu Avenue, Chengdu, Sichuan 610500, PR China
| | - Hongshan Jia
- College of Chemistry and Chemical Engineering, Southwest Petroleum University, 8 Xindu Avenue, Chengdu, Sichuan 610500, PR China
| | - Yucheng Liu
- College of Chemistry and Chemical Engineering, Southwest Petroleum University, 8 Xindu Avenue, Chengdu, Sichuan 610500, PR China; Research Institute of Industrial Hazardous Waste Disposal and Resource Utilization, Southwest Petroleum University, Chengdu, Sichuan 610500, PR China
| | - Lingli Li
- College of Chemistry and Chemical Engineering, Southwest Petroleum University, 8 Xindu Avenue, Chengdu, Sichuan 610500, PR China; Research Institute of Industrial Hazardous Waste Disposal and Resource Utilization, Southwest Petroleum University, Chengdu, Sichuan 610500, PR China.
| | - Yu-Hsuan Chiao
- Research Center for Membrane and Film Technology, Department of Chemical Science and Engineering, Kobe University, Rokkodaicho 1-1, Nada, Kobe 657-8501, Japan
| | - Xulin Yang
- School of Mechanical Engineering, Chengdu University, Chengdu, Sichuan 610106, PR China
| | - Fei Zhu
- College of Chemistry and Chemical Engineering, Southwest Petroleum University, 8 Xindu Avenue, Chengdu, Sichuan 610500, PR China
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13
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Habibi Zare M, Mehrabani-Zeinabad A. Yolk@Wrinkled-double shell smart nanoreactors: new platforms for mineralization of pharmaceutical wastewater. Front Chem 2023; 11:1211503. [PMID: 37347043 PMCID: PMC10281210 DOI: 10.3389/fchem.2023.1211503] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/24/2023] [Accepted: 05/25/2023] [Indexed: 06/23/2023] Open
Abstract
Nanomaterials with "yolk and shell" "structure" can be considered as "nanoreactors" that have significant potential for application in catalysis. Especially in terms of electrochemical energy storage and conversion, the nanoelectrode has a large specific surface area with a unique yolk@shell structure, which can reduce the volume change of the electrode during the charging and discharging process and fast ion/electron transfer channels. The adsorption of products and the improvement of conversion reaction efficiency can greatly improve the stability, speed and cycle performance of the electrode, and it is a kind of ideal electrode material. In this research, heterojunction nanoreactors (FZT Y@WDS) Fe3O4@ZrO2-X@TiO2-X were firstly synthesized based on the solvothermal combined hard-template process, partial etching and calcination. The response surface method was used to determine the performance of the FZT Y@WDS heterojunction nanoreactors and the effects of four process factors: naproxen concentration (NAP), solution pH, the amount of charged photocatalyst, and the irradiation time for photocatalytic degradation of NAP under visible light irradiation. To maximize the photocatalytic activity, the parameters of the loaded catalyst, the pH of the reaction medium, the initial concentration of NAP, and the irradiation time were set to 0.5 g/L, 3, 10 mg/L, and 60 min, respectively, resulting in complete removal of NAP and the optimum amount was calculated to be 0.5 g/L, 5.246, 14.092 mg/L, and 57.362 min, respectively. Considering the promising photocatalytic activity of FZT Y@WDS under visible light and the separation performance of the nanocomposite, we proposed this photocatalyst as an alternative solution for the treatment of pharmaceutical wastewater.
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Affiliation(s)
- Masoud Habibi Zare
- Department of Chemical Engineering, Isfahan University of Technology, Isfahan, Iran
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14
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Kasuma Warda Ningsih S, Wibowo R, Gunlazuardi J. Photoelectrochemical performance of BiOI/TiO 2 nanotube arrays (TNAs) p-n heterojunction synthesized by SILAR-ultrasonication-assisted methods. ROYAL SOCIETY OPEN SCIENCE 2023; 10:221563. [PMID: 37388319 PMCID: PMC10300691 DOI: 10.1098/rsos.221563] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Figures] [Subscribe] [Scholar Register] [Received: 12/21/2022] [Accepted: 03/03/2023] [Indexed: 07/01/2023]
Abstract
In order to extend the visible region activity of titania nanotube array (TNAs) films, the successive ionic layer adsorption and reaction (SILAR)-ultrasonication-assisted method has been used to prepare BiOI-modified TiO2 nanotube arrays (BiOI/TNAs). The band gap of BiOI/TNAs for all the variations reveals absorption in the visible absorption. The surface morphology of BiOI/TNAs is shown in the nanoplate, nanoflake and nanosheet forms with a vertical orientation perpendicular to TiO2. The crystalline structure of BiOI did not change the structure of the anatase TNAs, with the band gap energy of the BiOI/TNAs semiconductor in the visible region. The photocurrent density of the BiOI/TNAs extends to the visible-light range. BiOI/TNAs prepared with 1 mM Bi and 1 mM KI on TNAs 40 V 1 h, 50 V 30 min show the optimum photocurrent density. A tandem dye-sensitized solar cell (DSSC)-photoelectrochemical (PEC) was used for hydrogen production in salty water. BiOI/TNAs optimum was used as the photoanode of the PEC cell. The solar to hydrogen conversion efficiency (STH) of tandem DSSC-PEC reaches 1.34% in salty water.
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Affiliation(s)
- Sherly Kasuma Warda Ningsih
- Department of Chemistry, Faculty of Mathematics and Natural Sciences (FMIPA), Universitas Indonesia, Depok 16424, Indonesia
- Department of Chemistry, Faculty of Mathematics and Natural Sciences (FMIPA), Universitas Negeri Padang, Kampus Air tawar, Padang 25130, Indonesia
| | - Rahmat Wibowo
- Department of Chemistry, Faculty of Mathematics and Natural Sciences (FMIPA), Universitas Indonesia, Depok 16424, Indonesia
| | - Jarnuzi Gunlazuardi
- Department of Chemistry, Faculty of Mathematics and Natural Sciences (FMIPA), Universitas Indonesia, Depok 16424, Indonesia
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15
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Biswal L, Mishra BP, Das S, Acharya L, Nayak S, Parida K. Nanoarchitecture of a Ti 3C 2@TiO 2 Hybrid for Photocatalytic Antibiotic Degradation and Hydrogen Evolution: Stability, Kinetics, and Mechanistic Insights. Inorg Chem 2023; 62:7584-7597. [PMID: 37126844 DOI: 10.1021/acs.inorgchem.3c01138] [Citation(s) in RCA: 4] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 05/03/2023]
Abstract
Designing of a visible-light-driven semiconductor-based heterojunction with suitable band alignment and well-defined interfacial contact is considered to be an effective strategy for the transformation of solar-to-chemical energy and environmental remediation. In this context, MXenes have received tremendous attention in the research community due to their merits of abundant derivatives, elemental composition, excellent metallic conductivity, and surface termination groups. Meanwhile, a facile synthetic strategy for MXene-derived TiO2 nanocomposites with stable framework and higher photocatalytic activity under visible-light irradiation still remains a challenge for researchers. Herein, we report a novel synthetic strategy of preparing a two-dimensional Ti3C2@TiO2 nanohybrid by a facile reflux method under acidic conditions. In this oxidation reaction, protonation of the hydroxyl terminal group of MXene creates Ti more electrophilic and susceptible to an oxidative nucleophilic addition reaction with the presence of both water and oxygen. The physicochemical properties of the nanohybrid Ti3C2@TiO2 were verified by varieties of characterization techniques. High-resolution transmission electron microscopy and X-ray photoelectron spectroscopy analysis specifically elucidated the intimate interfacial interaction between Ti3C2 and TiO2. The optimized Ti3C2@TiO2-48 h photocatalyst exhibited the highest tetracycline hydrochloride (TCH, 90% in 90 min) degradation efficiency in comparison to pristine TiO2 with a rate constant (k) of 0.02463 min-1. The major contribution of •O2- and •OH radicals throughout photocatalytic TCH degradation was confirmed by the trapping experiment. Moreover, the photocatalyst showed the highest hydrogen generation rate of 140.8 μmol h-1 along with an apparent conversion efficiency of 2.2%. The excellent photocatalytic activity of Ti3C2@TiO2 originated from the superior electrical conductivity of cocatalyst Ti3C2, which facilitated spatial photogenerated e-/h+ separation and transfer at the Ti3C2 MXene@TiO2 interface. Overall, this research work will describe a promising protocol of designing MXene-derived photocatalysts toward efficient environmental remediation and wastewater treatment applications.
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Affiliation(s)
- Lijarani Biswal
- Centre for Nano Science and Nano Technology, Institute of Technical Education and Research, Siksha 'O' Anusandhan University, Bhubaneswar 751030, India
| | - Bhagyashree Priyadarshini Mishra
- Centre for Nano Science and Nano Technology, Institute of Technical Education and Research, Siksha 'O' Anusandhan University, Bhubaneswar 751030, India
| | - Sarmistha Das
- Centre for Nano Science and Nano Technology, Institute of Technical Education and Research, Siksha 'O' Anusandhan University, Bhubaneswar 751030, India
| | - Lopamudra Acharya
- Centre for Nano Science and Nano Technology, Institute of Technical Education and Research, Siksha 'O' Anusandhan University, Bhubaneswar 751030, India
| | - Susanginee Nayak
- Centre for Nano Science and Nano Technology, Institute of Technical Education and Research, Siksha 'O' Anusandhan University, Bhubaneswar 751030, India
| | - Kulamani Parida
- Centre for Nano Science and Nano Technology, Institute of Technical Education and Research, Siksha 'O' Anusandhan University, Bhubaneswar 751030, India
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16
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Wang C, Liu Y, Han H, Wang D, Chen J, Zhang R, Zuo S, Yao C, Kang J, Gui H. C,N co-doped TiO 2 hollow nanofibers coated stainless steel meshes for oil/water separation and visible light-driven degradation of pollutants. Sci Rep 2023; 13:5716. [PMID: 37029148 PMCID: PMC10082082 DOI: 10.1038/s41598-023-28992-4] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/28/2022] [Accepted: 01/27/2023] [Indexed: 04/09/2023] Open
Abstract
Complex pollutants are discharging and accumulating in rivers and oceans, requiring a coupled strategy to resolve pollutants efficiently. A novel method is proposed to treat multiple pollutants with C,N co-doped TiO2 hollow nanofibers coated stainless steel meshes which can realize efficient oil/water separation and visible light-drove dyes photodegradation. The poly(divinylbenzene-co-vinylbenzene chloride), P(DVB-co-VBC), nanofibers are generated by precipitate cationic polymerization on the mesh framework, following with quaternization by triethylamine for N doping. Then, TiO2 is coated on the polymeric nanofibers via in-situ sol-gel process of tetrabutyl titanate. The functional mesh coated with C,N co-doped TiO2 hollow nanofibers is obtained after calcination under nitrogen atmosphere. The resultant mesh demonstrates superhydrophilic/underwater superoleophobic property which is promising in oil/water separation. More importantly, the C,N co-doped TiO2 hollow nanofibers endow the mesh with high photodegradation ability to dyes under visible light. This work draws an affordable but high-performance multifunctional mesh for potential applications in wastewater treatment.
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Affiliation(s)
- Chunyu Wang
- State Key Laboratory of NBC Protection for Civilian, Beijing, 102205, China
- Department of Chemical Engineering, Tsinghua University, Beijing, 100084, China
| | - Yingze Liu
- Department of Chemical Engineering, Tsinghua University, Beijing, 100084, China
| | - Hao Han
- State Key Laboratory of NBC Protection for Civilian, Beijing, 102205, China
| | - Desheng Wang
- State Key Laboratory of NBC Protection for Civilian, Beijing, 102205, China
| | - Jieyi Chen
- School of Petrochemical Engineering, Changzhou University, Changzhou, 213164, China
| | - Renzhi Zhang
- School of Petrochemical Engineering, Changzhou University, Changzhou, 213164, China
| | - Shixiang Zuo
- School of Petrochemical Engineering, Changzhou University, Changzhou, 213164, China
- Jiangsu Key Laboratory of Advanced Catalytic Materials and Technology, Advanced Catalysis and Green Manufacturing Collaborative Innovation Center, Changzhou University, Changzhou, 213164, China
| | - Chao Yao
- School of Petrochemical Engineering, Changzhou University, Changzhou, 213164, China
- Jiangsu Key Laboratory of Advanced Catalytic Materials and Technology, Advanced Catalysis and Green Manufacturing Collaborative Innovation Center, Changzhou University, Changzhou, 213164, China
| | - Jian Kang
- State Key Laboratory of NBC Protection for Civilian, Beijing, 102205, China.
| | - Haoguan Gui
- Department of Chemical Engineering, Tsinghua University, Beijing, 100084, China.
- School of Petrochemical Engineering, Changzhou University, Changzhou, 213164, China.
- Jiangsu Key Laboratory of Advanced Catalytic Materials and Technology, Advanced Catalysis and Green Manufacturing Collaborative Innovation Center, Changzhou University, Changzhou, 213164, China.
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17
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Cui L, Wen J, Deng Q, Du X, Tang T, Li M, Xiao J, Jiang L, Hu G, Cao X, Yao Y. Improving the Photocatalytic Activity of Ti 3C 2 MXene by Surface Modification of N Doped. MATERIALS (BASEL, SWITZERLAND) 2023; 16:2836. [PMID: 37049130 PMCID: PMC10095762 DOI: 10.3390/ma16072836] [Citation(s) in RCA: 2] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Figures] [Subscribe] [Scholar Register] [Received: 02/23/2023] [Revised: 03/21/2023] [Accepted: 03/22/2023] [Indexed: 06/19/2023]
Abstract
Methyl orange dye (MO) is one of the azo dyes, which is not only difficult to degrade but also hazardous to human health, therefore, it is necessary to develop an efficient photocatalyst to degrade MO. In this paper, a facile and low-cost elemental doping method was used for the surface modification of Ti3C2 MXene, i.e., nitrogen-doped titanium carbide was used as the nitrogen source, and the strategy of combining solvent heat treatment with non-in situ nitrogen doping was used to prepare N-Ti3C2 MXene two-dimensional nanomaterials with high catalytic activity. It was found that the catalytic efficiency of N-Ti3C2 MXene materials was enhanced and improved compared to the non-doped Ti3C2 MXene. In particular, N-Ti3C2 1:8 MXene showed the best photo-catalytic ability, as demonstrated by the fact that the N-Ti3C2 1:8 MXene material successfully degraded 98.73% of MO (20 mg/L) under UV lamp irradiation for 20 min, and its catalytic efficiency was about ten times that of Ti3C2 MXene, and the N-Ti3C2 photo-catalyst still showed good stability after four cycles. This work shows a simplified method for solvent heat-treating non-in situ nitrogen-doped Ti3C2 MXene, and also elaborates on the photo-catalytic mechanism of N-Ti3C2 MXene, showing that the high photo-catalytic effect of N-Ti3C2 MXene is due to the synergistic effect of its efficient charge transfer and surface-rich moieties. Therefore, N-Ti3C2 MXene has a good prospect as a photo-catalyst in the photocatalytic degradation of organic pollutants.
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Affiliation(s)
- Lidan Cui
- Key Laboratory of Low-Imensional Structural Physics and Application, Education Department of Guangxi Zhuang Autonomous Region, College of Science, Guilin University of Technology, Guilin 541000, China; (L.C.)
| | - Jianfeng Wen
- Key Laboratory of Low-Imensional Structural Physics and Application, Education Department of Guangxi Zhuang Autonomous Region, College of Science, Guilin University of Technology, Guilin 541000, China; (L.C.)
| | - Quanhao Deng
- Key Laboratory of Low-Imensional Structural Physics and Application, Education Department of Guangxi Zhuang Autonomous Region, College of Science, Guilin University of Technology, Guilin 541000, China; (L.C.)
| | - Xin Du
- Key Laboratory of Low-Imensional Structural Physics and Application, Education Department of Guangxi Zhuang Autonomous Region, College of Science, Guilin University of Technology, Guilin 541000, China; (L.C.)
| | - Tao Tang
- Key Laboratory of Low-Imensional Structural Physics and Application, Education Department of Guangxi Zhuang Autonomous Region, College of Science, Guilin University of Technology, Guilin 541000, China; (L.C.)
| | - Ming Li
- Key Laboratory of Low-Imensional Structural Physics and Application, Education Department of Guangxi Zhuang Autonomous Region, College of Science, Guilin University of Technology, Guilin 541000, China; (L.C.)
| | - Jianrong Xiao
- Key Laboratory of Low-Imensional Structural Physics and Application, Education Department of Guangxi Zhuang Autonomous Region, College of Science, Guilin University of Technology, Guilin 541000, China; (L.C.)
| | - Li Jiang
- Key Laboratory of Low-Imensional Structural Physics and Application, Education Department of Guangxi Zhuang Autonomous Region, College of Science, Guilin University of Technology, Guilin 541000, China; (L.C.)
| | - Guanghui Hu
- Key Laboratory of Low-Imensional Structural Physics and Application, Education Department of Guangxi Zhuang Autonomous Region, College of Science, Guilin University of Technology, Guilin 541000, China; (L.C.)
| | - Xueli Cao
- Key Laboratory of Low-Imensional Structural Physics and Application, Education Department of Guangxi Zhuang Autonomous Region, College of Science, Guilin University of Technology, Guilin 541000, China; (L.C.)
| | - Yi Yao
- Guangxi Collaborative Innovation Center for Water Pollution Control and Water Safety in Karst Areas, College of Environmental Science and Engineering, Guilin University of Technology, 319 Yanshan Street, Guilin 541000, China
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18
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Chaudhary RG, Sonkusare V, Bhusari G, Mondal A, Potbhare A, Juneja H, Abdala A, Sharma R. Preparation of mesoporous ThO 2 nanoparticles: Influence of calcination on morphology and visible-light-driven photocatalytic degradation of indigo carmine and methylene blue. ENVIRONMENTAL RESEARCH 2023; 222:115363. [PMID: 36716808 DOI: 10.1016/j.envres.2023.115363] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 11/07/2022] [Revised: 01/10/2023] [Accepted: 01/23/2023] [Indexed: 06/18/2023]
Abstract
The present article reports the synthesis of thoria nanoparticles (ThO2 NPs) via sol-gel process and examines the effect of calcination temperature of ThO2 on the morphology and photocatalytic degradation of indigo carmine (IC) and methylene blue (MB) under visible-light. As-synthesized white crystals of ThO2 were subjected to calcination at different temperatures, viz. 700 °C (TH-700), 800 °C (TH-800), and 900 °C (TH-900). The effect of calcination temperature on the structural, morphological, thermal, surface area-porosity, and optical properties of ThO2 NPs were investigated by diverse analytical techniques. XRD patterns show the cubic-space group Fm-3m (225) with parameter a = 5.597 Å and reveals crystallite sizes increased with calcination temperature. The bandgap energy was found to be 1.85 eV, 2.33 eV, and 2.71 eV for TH-700, TH-800, and TH-900 NPs, respectively, calculated by Kubelka-Munk (KM) plot. SEM and TEM unveil that the sample TH-700 calcined at a low temperature of 700 °C yields assembled nanosheets, while at higher temperatures, i.e., 800 °C (TH-800) and 900 °C (TH-900), produces agglomerated nanomaterials. Further, TH-700 sample exhibits enhanced photocatalytic degradation within 120 min for both IC and MB dye than TH-800 and TH-900 counterparts. Among the dyes, IC shows improved photocatalytic efficiency than MB for TH-700, owing to the increased optical absorption and improved separation of photogenerated charge carriers. The reusability study of TH-700 reveals that the catalysts were stable up to four successive cycles with no drastic changes in photocatalytic efficiency. Also, systematic photodisintegration of IC was investigated by Liquid chromatography-mass spectrometry (LC-MS).
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Affiliation(s)
- Ratiram Gomaji Chaudhary
- Post Graduate Department of Chemistry, Seth Kesarimal Porwal College of Arts, And Science and Commerce, Kamptee, 441001, India.
| | - Vaishali Sonkusare
- Post Graduate Teaching Department of Chemistry, Rashtrasant Tukdoji Maharaj Nagpur University, Nagpur, 440033, India.
| | - Ganesh Bhusari
- Research and Development Division, Solar Industries India Limited, Nagpur, 440023, India.
| | - Aniruddha Mondal
- Division of Materials Science, Lulea University of Technology, Lulea, 97187, Sweden.
| | - Ajay Potbhare
- Post Graduate Department of Chemistry, Seth Kesarimal Porwal College of Arts, And Science and Commerce, Kamptee, 441001, India.
| | - Harjeet Juneja
- Post Graduate Teaching Department of Chemistry, Rashtrasant Tukdoji Maharaj Nagpur University, Nagpur, 440033, India.
| | - Ahmed Abdala
- Chemical Engineering Program, Texas A and M University at Qatar POB, 23784, Doha, Qatar.
| | - Rohit Sharma
- Department of Rasa Shastra and Bhaishajya Kalpana, Faculty of Ayurveda, Institute of Medical Sciences, Banaras Hindu University, Varanasi, 221005, Uttar Pradesh, India.
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19
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Çiçek Özkan B, Selen V, Gülyüz F, Dursun G. Comparative Photocatalytic Activity and Total Organic Carbon Removal Efficiency of TiO
2
And ZnO for Reactive Black 5 Photodegradation. ChemistrySelect 2023. [DOI: 10.1002/slct.202204314] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/03/2023]
Affiliation(s)
- Betül Çiçek Özkan
- Department of Metallurgical and Materials Engineering Technology Faculty Fırat University 23279 Elazığ Turkey
| | - Veyis Selen
- Department of Bioengineering Engineering Faculty Fırat University 23279 Elazığ Turkey
| | - Feyza Gülyüz
- Department of Chemical Engineering Engineering Faculty Firat University 23279 Elazig Turkey
| | - Gülbeyi Dursun
- Department of Chemical Engineering Engineering Faculty Firat University 23279 Elazig Turkey
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20
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Inter-plane 2D/2D ultrathin La2Ti2O7/Ti3C2 MXene Schottky heterojunctions toward high-efficiency photocatalytic CO2 reduction. CHINESE JOURNAL OF CATALYSIS 2023. [DOI: 10.1016/s1872-2067(22)64155-x] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 12/03/2022]
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21
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Bhattacharjee B, Ahmaruzzaman M, Djellabi R, Elimian E, Rtimi S. Advances in 2D MXenes-based materials for water purification and disinfection: Synthesis approaches and photocatalytic mechanistic pathways. JOURNAL OF ENVIRONMENTAL MANAGEMENT 2022; 324:116387. [PMID: 36352727 DOI: 10.1016/j.jenvman.2022.116387] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 08/08/2022] [Revised: 09/22/2022] [Accepted: 09/26/2022] [Indexed: 06/16/2023]
Abstract
MXenes two-dimensional materials have recently excited researchers' curiosity for various industrial applications. MXenes are promising materials for environmental remediation technologies to sense and mitigate various intractable hazardous pollutants from the atmosphere due to their inherent mechanical and physicochemical properties, such as high surface area, increased hydrophilicity, high conductivity, changing band gaps, and robust electrochemistry. This review discusses the versatile applications of MXenes and MXene-based nanocomposites in various environmental remediation processes. A brief description of synthetic procedures of MXenes nanocomposites and their different properties are highlighted. Afterward, the photocatalytic abilities of MXene-based nanocomposites for degrading organic pollutants, removal of heavy metals, and inactivation of microorganisms are discussed. In addition, the role of MXenes anti-corrosion support in the lifetime of some semiconductors was addressed. Current challenges and future perspectives toward the application of MXene materials for environmental remediation and energy production are summarized for plausible real-world use.
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Affiliation(s)
| | - Md Ahmaruzzaman
- Department of Chemistry, National Institute of Technology Silchar, 788010, Assam, India.
| | - Ridha Djellabi
- Department of Chemical Engineering, Universitat Rovira i Virgili, 43007, Tarragona, Spain
| | - Ehiaghe Elimian
- Department of Chemical and Environmental Engineering, Faculty of Science and Engineering, University of Nottingham Ningbo China, Ningbo, 315100, China
| | - Sami Rtimi
- Global Institute for Water, Environment and Health, 1201, Geneva, Switzerland.
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22
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Peng Q, Tang X, Liu K, Zhong W, Zhang Y, Xing J. Synthesis of silica nanofibers-supported BiOCl/TiO2 heterojunction composites with enhanced visible-light photocatalytic performance. Colloids Surf A Physicochem Eng Asp 2022. [DOI: 10.1016/j.colsurfa.2022.129798] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/03/2022]
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23
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Ali S, Abdul Nasir J, Nasir Dara R, Rehman Z. Modification strategies of metal oxide photocatalysts for clean energy and environmental applications: A review. INORG CHEM COMMUN 2022. [DOI: 10.1016/j.inoche.2022.110011] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/05/2022]
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24
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Marouch S, Benbellat N, Duran A, Yilmaz E. Nanoclay- and TiO 2 Nanoparticle-Modified Poly( N-vinyl pyrrolidone) Hydrogels: A Multifunctional Material for Application in Photocatalytic Degradation and Adsorption-Based Removal of Organic Contaminants. ACS OMEGA 2022; 7:35256-35268. [PMID: 36211033 PMCID: PMC9535731 DOI: 10.1021/acsomega.2c04595] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Figures] [Subscribe] [Scholar Register] [Received: 07/20/2022] [Accepted: 09/09/2022] [Indexed: 06/16/2023]
Abstract
In recent times, access to clean water has become increasingly difficult and one of the most important problems for the sustainability of life due to environmental pollution. Based on this thought, in this study, a multifunctional hydrogel nanocomposite (nanoclay@TiO2@PNVP) containing linear poly(N-vinyl pyrrolidone) (PNVP), nanoclay, and TiO2 nanoparticles was synthesized and used as an adsorbent and photocatalyst for the adsorption-based and photocatalytic degradation-based removal of organic and pharmaceutical pollutants such as methylene blue (MB) and sildenafil citrate (SLD). The modification of the hydrogel with TiO2 nanoparticles and nanoclay aimed to increase the adsorption capacity of the PNVP hydrogel as well as to gain photocatalytic properties for the effective removal of organic contaminants. This hybrid material, which can be cleaned in two different ways, can be reused and recycled at least 10 times. Characterization studies were carried out using Fourier transform infrared spectroscopy, scanning electron microscopy, Raman spectroscopy, thermogravimetric analysis, differential thermogravimetry, and viscosimetry techniques. Optimization studies for the adsorption-based removal of organic contaminants were carried out on MB and SLD as model organic compounds. The optimum parameters for MB were found at pH 10 of the sample solution when 50 mg of the nanoclay@TiO2@PNVP hydrogel nanocomposite was used for 420 min of contact time. It was observed that 99% of the MB was photocatalytically degraded within 150 min at pH 10. Our material had multifunctional applicability properties, showing high adsorption and photocatalytic performances over 99% for at least 10 times of use. For the removal of organic and pharmaceutical contaminants from wastewater, the synthesized material can be used in two treatment processes separately or in combination in one step, providing an important advantage for its usability in environmental applications.
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Affiliation(s)
- Salsabil Marouch
- Laboratory
of Chemistry and Environmental Chemistry (LCCE), Department of Chemistry,
Faculty of Matter Sciences, Batna-1 University, 05000 Batna, Algeria
- Department
of Analytical Chemistry, Faculty of Pharmacy, Erciyes University, 38039 Kayseri, Turkey
- Nanotechnology
Application and Research Center, ERNAM Erciyes
University, 38039, Kayseri, Turkey
| | - Noura Benbellat
- Laboratory
of Chemistry of Materials and Living: Activity & Reactivity (LCMVAR),
Department of Chemistry, Faculty of Matter Sciences, Batna-1 University, 05000 Batna, Algeria
| | - Ali Duran
- Department
of Nanotechnology Engineering, Faculty of Engineering, Abdullah Gul University, 38080 Kayseri, Turkey
| | - Erkan Yilmaz
- Laboratory
of Chemistry and Environmental Chemistry (LCCE), Department of Chemistry,
Faculty of Matter Sciences, Batna-1 University, 05000 Batna, Algeria
- Department
of Analytical Chemistry, Faculty of Pharmacy, Erciyes University, 38039 Kayseri, Turkey
- Technology
Research and Application Center (TAUM), Erciyes University, 38039 Kayseri, Turkey
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25
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Feng Q, Zhan Y, Yang W, Dong H, Sun A, Li L, Chen X, Chen Y. Ultra-high flux and synergistically enhanced anti-fouling Ag@MXene lamellar membrane for the fast purification of oily wastewater through nano-intercalation, photocatalytic self-cleaning and antibacterial effect. Sep Purif Technol 2022. [DOI: 10.1016/j.seppur.2022.121635] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/23/2023]
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26
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Yuan L, Geng Z, Zhang S, Xu J, Guo F, Kumar Kundu B, Han C. Efficient all-in-one removal of total chromium over nonconjugated polymer-inorganic ZnIn 2S 4 semiconductor hybrid. J Colloid Interface Sci 2022; 628:100-108. [PMID: 35914422 DOI: 10.1016/j.jcis.2022.07.107] [Citation(s) in RCA: 5] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/25/2022] [Revised: 07/05/2022] [Accepted: 07/18/2022] [Indexed: 10/17/2022]
Abstract
Chromium (Cr)-containing wastewater has caused a serious threat to the environment due to its high toxicity and mobility. The traditional Cr removal methods are generally based on an inconvenient two-step process with the first transformation of Cr(VI) to Cr(III) and the consecutive removal of Cr(III) by precipitation. Herein, we demonstrate the efficient all-in-one removal of total Cr through the simultaneous photocatalytic reduction of Cr(VI) to Cr(III) and in-situ fixation of Cr(III) over the nonconjugated polymer engineered ZnIn2S4 (P-ZIS) photocatalyst. By in-situ polyvinylpyrrolidone (PVP) modification of ZIS during the preparation process, the resulted P-ZIS can completely reduce Cr(VI) within 60 min under visible light irradiation. The kinetics of Cr(VI) reduction over P-ZIS is 2.8 times as that of pure ZIS, which is proved to be benefited from the enhanced light absorption, uplifted conduction band for strengthening reducibility, and accelerated charge carrier transfer. Moreover, as compared to ZIS, P-ZIS also exhibits significantly improved in-situ adsorption ability for Cr(III), thus resulting in efficient all-in-one elimination of total Cr within a single system. We show that this polymer engineered strategy could be a facile and versatile protocol for modulating the electronic structure and surface chemistry of the semiconductor photocatalysts towards complete, safe, and cost-efficient removal of Cr.
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Affiliation(s)
- Lan Yuan
- Key Laboratory of Hubei Province for Coal Conversion and New Carbon Materials, School of Chemistry and Chemical Engineering, Wuhan University of Science and Technology, Wuhan 430081, China
| | - Zhaoyi Geng
- Key Laboratory of Hubei Province for Coal Conversion and New Carbon Materials, School of Chemistry and Chemical Engineering, Wuhan University of Science and Technology, Wuhan 430081, China
| | - Shen Zhang
- The PLA Rocket Force Command College, Wuhan 430012, China
| | - Jikun Xu
- Key Laboratory of Hubei Province for Coal Conversion and New Carbon Materials, School of Chemistry and Chemical Engineering, Wuhan University of Science and Technology, Wuhan 430081, China
| | - Fen Guo
- Key Laboratory of Hubei Province for Coal Conversion and New Carbon Materials, School of Chemistry and Chemical Engineering, Wuhan University of Science and Technology, Wuhan 430081, China
| | - Bidyut Kumar Kundu
- Department of Chemistry, University of Cincinnati, Cincinnati, OH 45221, United States
| | - Chuang Han
- Department of Chemistry, University of Cincinnati, Cincinnati, OH 45221, United States.
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Hussaini M, Vohra M. LDH-TiO 2 Composite for Selenocyanate (SeCN -) Photocatalytic Degradation: Characterization, Treatment Efficiency, Reaction Intermediates and Modeling. NANOMATERIALS 2022; 12:nano12122035. [PMID: 35745375 PMCID: PMC9227849 DOI: 10.3390/nano12122035] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 05/20/2022] [Revised: 06/02/2022] [Accepted: 06/09/2022] [Indexed: 02/06/2023]
Abstract
Selenium as a nutrient has a narrow margin between safe and toxic limits. Hence, wastewater discharges from selenium-containing sources require appropriate treatment that considers health concerns and stringent selenium-related water treatment standards. This work examined the use of a photocatalysis-cum-adsorption system based on a layered double hydroxide coupled with TiO2 (LDH-TiO2) to remove aqueous phase selenocyanate (SeCN−), which is difficult to treat and requires specific treatment procedures. The synthesized LDH and LDH-TiO2 composite samples were characterized using the X-ray diffraction (XRD), field emission scanning electron microscopy (FESEM), and thermogravimetry analysis (TGA) methods. The XRD results for the uncalcined LDH indicated a hydrotalcite mass with a rhombohedral structure, whereas increasing the calcination temperature indicated transition to an amorphous state. FESEM results for the LDH-TiO2 matrix indicated round titanium dioxide particles and LDH hexagonal layers. The TGA findings for uncalcined LDH showed a gradual decrease in weight up to 250 °C, followed by a short plateau and then a sharp decrease in LDH weight from 320 °C, with a net weight loss around 47%. Based on the characterization and initial selenocyanate adsorption results, the 250 °C calcined LDH-TiO2 matrix was used for the selenocyanate photocatalysis. A ~100% selenium removal was observed using LDH:TiO2 at a 1.5:1 w/w ratio with a 2 g/L dose, whereas up to 80% selenium removal was noted for LDH:TiO2 at a 0.5:1 w/w ratio. The respective difference in the efficiency of selenium treatment was attributed to enhanced LDH-based adsorption sites in the enhanced LDH:TiO2 w/w ratio. Furthermore, the selenite and selenate that occurred during SeCN− photocatalytic degradation (PCD) were also nearly completely removed via adsorption. An optimization exercise using response surface methodology (RSM) for total selenium removal showed R2 values of more than 0.95, with a prediction accuracy of more than 90%. In summary, the present findings show that the use of a photocatalysis-cum-adsorption system based on LDH-TiO2 is a promising technique to treat industrial wastewater discharges for selenocyanate and also remove the resulting intermediates.
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Affiliation(s)
- Minaam Hussaini
- Civil and Environmental Engineering Department, King Fahd University of Petroleum & Minerals (KFUPM), Dhahran 31261, Saudi Arabia;
| | - Muhammad Vohra
- Civil and Environmental Engineering Department, King Fahd University of Petroleum & Minerals (KFUPM), Dhahran 31261, Saudi Arabia;
- Interdisciplinary Research Center for Construction and Building Materials (IRC-CBM), King Fahd University of Petroleum & Minerals (KFUPM), Dhahran 31261, Saudi Arabia
- Correspondence: ; Tel.: +966-13-860-2854
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28
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Zhang X, An D, Bi Z, Shan W, Zhu B, Zhou L, Yu L, Zhang H, Xia S, Qiu M. Ti3C2-MXene@N-Doped Carbon Heterostructure-based Electrochemical Sensor for Simultaneous Detection of Heavy Metals. J Electroanal Chem (Lausanne) 2022. [DOI: 10.1016/j.jelechem.2022.116239] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/17/2022]
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29
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Wang L, Yang T, Peng L, Zhang Q, She X, Tang H, Liu Q. Dual transfer channels of photo-carriers in 2D/2D/2D sandwich-like ZnIn2S4/g-C3N4/Ti3C2 MXene S-scheme/Schottky heterojunction for boosting photocatalytic H2 evolution. CHINESE JOURNAL OF CATALYSIS 2022. [DOI: 10.1016/s1872-2067(22)64133-0] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/07/2022]
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