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Abreu-Jaureguí C, Andronic L, Sepúlveda-Escribano A, Silvestre-Albero J. Improved photocatalytic performance of TiO 2/carbon photocatalysts: Role of carbon additive. ENVIRONMENTAL RESEARCH 2024; 251:118672. [PMID: 38508360 DOI: 10.1016/j.envres.2024.118672] [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: 11/24/2023] [Revised: 02/26/2024] [Accepted: 03/09/2024] [Indexed: 03/22/2024]
Abstract
A series of TiO2 - based photocatalysts have been prepared by the incorporation of 10 wt% of various carbon-based nanomaterials as modifying agents to titania. More specifically, commercial TiO2 P25 was modified through a wet impregnation approach with methanol with four different carbon nanostructures: single-walled carbon nanotubes (SWCNTs), partially reduced graphene oxide (prGO), graphite (GI), and graphitic carbon nitride (gCN). Characterization results (XPS and Raman) anticipate the occurrence of important interfacial phenomena, preferentially for samples TiO2/SWCNT and TiO2/prGO, with a binding energy displacement in the Ti 2p contribution of 1.35 eV and 1.54 eV, respectively. These findings could be associated with an improved electron-hole mobility at the carbon/oxide interface. Importantly, these two samples constitute the most promising photocatalysts for Rhodamine B (RhB) photodegradation, with nearly 100% conversion in less than 2 h. These promising results must be associated with intrinsic physicochemical changes at the formed heterojunction structure and the potential dual-role of the composites able to adsorb and degrade RhB simultaneously. Cyclability tests confirm the improved performance of the composites (e.g., TiO2/SWCNT, 100% degradation in 1 h) due to the combined adsorption/degradation ability, although the regeneration after several cycles is not complete due to partial blocking of the inner cavities in the carbon nanotubes by non-reacted RhB. Under these reaction conditions, Rhodamine-B xanthene dye degrades via the de-ethylation route.
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Affiliation(s)
- C Abreu-Jaureguí
- Laboratorio de Materiales Avanzados, Departamento de Química Inorgánica - Instituto Universitario de Materiales, Universidad de Alicante, Spain
| | - L Andronic
- Product Design, Mechatronics and Environment Department, Transilvania University of Brasov, Romania
| | - A Sepúlveda-Escribano
- Laboratorio de Materiales Avanzados, Departamento de Química Inorgánica - Instituto Universitario de Materiales, Universidad de Alicante, Spain
| | - J Silvestre-Albero
- Laboratorio de Materiales Avanzados, Departamento de Química Inorgánica - Instituto Universitario de Materiales, Universidad de Alicante, Spain.
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2
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Moral-Rodríguez AI, Ramírez-Valencia LD, Bailón-García E, Carrasco-Marín F, Pérez-Cadenas AF. Green synthesis of BiVO 4/Eco-graphene nanostructures for the elimination of sulfamethoxazole by adsorption and photo-degradation using blue LED light. ENVIRONMENTAL RESEARCH 2024; 247:118120. [PMID: 38199476 DOI: 10.1016/j.envres.2024.118120] [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: 09/28/2023] [Revised: 12/29/2023] [Accepted: 01/04/2024] [Indexed: 01/12/2024]
Abstract
Photo-catalysts based on BiVO4 (BV) and Eco-graphene (EG) were synthesized and obtained in a single step with high-quality properties. These nanostructures (NEs) were obtained through a green chemistry route and by adding 2, 3, and 5 wt% of a homemade EG. The BV/X EG NEs (where X = corresponds to the weight % of EG) demonstrated high photocatalytic activity, obtaining Sulfamethoxazole degradation percentages of 40, 45, 52, and 57 for BV, BV/2 EG, BV/3 EG, and BV/5 EG respectively, using a blue LED light. In addition, it was observed that the presence of EG slightly affected the surface area and porosity of BV. Moreover, it was observed that the presence of EG stabilized the scheelite monoclinic phase (m-s), and decreased the crystal size and band-gap values of BV-based samples. It was detected that EG contents increased the BV reduction, creating oxygen vacancies and V4+ states, which favored electron transfer, enhanced the photo-catalytic activity, and decreased the recombination rate. The adsorption influence of the BV/EG system was also studied. Finally, the stability tests of these materials after four cycles of reuse allowed keeping practically the full degradation capacity, demonstrating that these NEs represent a promising material driven by visible light that can be used for wastewater decontamination in the presence of drugs.
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Affiliation(s)
- A I Moral-Rodríguez
- UGR-Carbon - Materiales Polifuncionales Basados en Carbono, Dpto. Química Inorgánica - Unidad de Excelencia Química Aplicada a Biomedicina y Medioambiente - Universidad de Granada, ES18071, Granada, Spain.
| | - L D Ramírez-Valencia
- UGR-Carbon - Materiales Polifuncionales Basados en Carbono, Dpto. Química Inorgánica - Unidad de Excelencia Química Aplicada a Biomedicina y Medioambiente - Universidad de Granada, ES18071, Granada, Spain
| | - E Bailón-García
- UGR-Carbon - Materiales Polifuncionales Basados en Carbono, Dpto. Química Inorgánica - Unidad de Excelencia Química Aplicada a Biomedicina y Medioambiente - Universidad de Granada, ES18071, Granada, Spain
| | - F Carrasco-Marín
- UGR-Carbon - Materiales Polifuncionales Basados en Carbono, Dpto. Química Inorgánica - Unidad de Excelencia Química Aplicada a Biomedicina y Medioambiente - Universidad de Granada, ES18071, Granada, Spain
| | - A F Pérez-Cadenas
- UGR-Carbon - Materiales Polifuncionales Basados en Carbono, Dpto. Química Inorgánica - Unidad de Excelencia Química Aplicada a Biomedicina y Medioambiente - Universidad de Granada, ES18071, Granada, Spain.
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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. JOURNAL OF ENVIRONMENTAL MANAGEMENT 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] [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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Liu P, Dörfler A, Tabrizi AA, Skokan L, Rawach D, Wang P, Peng Z, Zhang J, Ruediger AP, Claverie JP. In Operando Photoswitching of Cu Oxidation States in Cu-Based Plasmonic Heterogeneous Photocatalysis for Efficient H 2 Evolution. ACS APPLIED MATERIALS & INTERFACES 2023. [PMID: 37257196 DOI: 10.1021/acsami.3c01219] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/02/2023]
Abstract
Metal nanoparticles (NP) supported on TiO2 are known to be efficient photocatalysts for solar-to-chemical energy conversion. While TiO2 decorated with copper NPs has the potential to become an attractive system, the poor oxidative stability of Cu severely limits its applicability. In this work, we demonstrate that, when Cu NPs supported on TiO2 nanobelts (NBs) are engaged in the photocatalytic generation of H2 from water under light illumination, Cu is not only oxidized in CuO but also dissolved under the form of Cu+/Cu2+ ions, leading to a continuous reconstruction of nanoparticles via Ostwald ripening. By nanoencapsulating the CuOx (Cu/CuO/Cu2O) NPs by a few layers of carbon supported on TiO2 (TC@C), Ostwald ripening can be suppressed. Simultaneously, the resulting CuOx@C NPs are photoreduced under light illumination to generate Cu@C NPs. This photoswitching strategy allows the preparation of a Cu plasmonic photocatalyst with enhanced activity for H2 production. Remarkably, the photocatalyst is even active when illuminated with visible light, indicating a clear plasmonic enhancement of photocatalytic activity from the surface plasmonic resonance (SPR) effect of Cu NPs. Three-dimensional electromagnetic wave-frequency domain (3D-EWFD) simulations were conducted to confirm the SPR enhancement. This advance bodes for the development of scalable multifunctional Cu-based plasmonic photocatalysts for solar energy transfer.
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Affiliation(s)
- Peipei Liu
- Département de Chimie, Université de Sherbrooke, 2500 Blvd de l'Université, Sherbrooke, QC J1K2R1, Canada
- Centre Énergie, Matériaux & Télécommunications, Institut National de la Recherche Scientifique, 1650 Boulevard Lionel-Boulet, Varennes, Québec J3X 1S2, Canada
| | - Andreas Dörfler
- Centre Énergie, Matériaux & Télécommunications, Institut National de la Recherche Scientifique, 1650 Boulevard Lionel-Boulet, Varennes, Québec J3X 1S2, Canada
| | - Afsaneh Asgariyan Tabrizi
- Centre Énergie, Matériaux & Télécommunications, Institut National de la Recherche Scientifique, 1650 Boulevard Lionel-Boulet, Varennes, Québec J3X 1S2, Canada
| | - Lilian Skokan
- Centre Énergie, Matériaux & Télécommunications, Institut National de la Recherche Scientifique, 1650 Boulevard Lionel-Boulet, Varennes, Québec J3X 1S2, Canada
| | - Diane Rawach
- Centre Énergie, Matériaux & Télécommunications, Institut National de la Recherche Scientifique, 1650 Boulevard Lionel-Boulet, Varennes, Québec J3X 1S2, Canada
| | - Peikui Wang
- Département de Chimie, Université de Sherbrooke, 2500 Blvd de l'Université, Sherbrooke, QC J1K2R1, Canada
| | - Zhiyuan Peng
- Department of Chemistry and Biochemistry, Université du Québec à Montréal, CP8888, Montréal QC H3C 3P8, Canada
| | - Jianming Zhang
- School of Chemistry and Chemical Engineering, Jiangsu University, Zhenjiang 212013, China
| | - Andreas Peter Ruediger
- Centre Énergie, Matériaux & Télécommunications, Institut National de la Recherche Scientifique, 1650 Boulevard Lionel-Boulet, Varennes, Québec J3X 1S2, Canada
| | - Jerome P Claverie
- Département de Chimie, Université de Sherbrooke, 2500 Blvd de l'Université, Sherbrooke, QC J1K2R1, Canada
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Hu Y, Zhang X, Zhang X, Feng H, Xu L. In situ strategy to construct Z-scheme poly(diphenylbutadiene)/TiO2 heterojunctions with enhanced visible light photocatalytic performance. J SOLID STATE CHEM 2022. [DOI: 10.1016/j.jssc.2022.123085] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/15/2022]
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6
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Wang J, Wang Z, Wang W, Wang Y, Hu X, Liu J, Gong X, Miao W, Ding L, Li X, Tang J. Synthesis, modification and application of titanium dioxide nanoparticles: a review. NANOSCALE 2022; 14:6709-6734. [PMID: 35475489 DOI: 10.1039/d1nr08349j] [Citation(s) in RCA: 37] [Impact Index Per Article: 18.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/14/2023]
Abstract
Titanium dioxide (TiO2) has been heavily investigated owing to its low cost, benign nature and strong photocatalytic ability. Thus, TiO2 has broad applications including photocatalysts, Li-ion batteries, solar cells, medical research and so on. However, the performance of TiO2 is not satisfactory due to many factors such as the broad band gap (3.01 to 3.2 eV) and fast recombination of electron-hole pairs (10-12 to 10-11 s). Plenty of work has been undertaken to improve the properties, such as structural and dopant modifications, which broaden the applications of TiO2. This review mainly discusses the aspects of TiO2-modified nanoparticles including synthetic methods, modifications and applications.
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Affiliation(s)
- Jinqi Wang
- Institute of Hybrid Materials, National Center of International Joint Research for Hybrid Materials Technology, National Base of International Science & Technology Cooperation on Hybrid Materials, College of Materials Science and Engineering, Qingdao University, 308 Ningxia Road, Qingdao 266071, China.
| | - Zhiheng Wang
- Institute of Hybrid Materials, National Center of International Joint Research for Hybrid Materials Technology, National Base of International Science & Technology Cooperation on Hybrid Materials, College of Materials Science and Engineering, Qingdao University, 308 Ningxia Road, Qingdao 266071, China.
| | - Wei Wang
- Institute of Hybrid Materials, National Center of International Joint Research for Hybrid Materials Technology, National Base of International Science & Technology Cooperation on Hybrid Materials, College of Materials Science and Engineering, Qingdao University, 308 Ningxia Road, Qingdao 266071, China.
| | - Yao Wang
- Institute of Hybrid Materials, National Center of International Joint Research for Hybrid Materials Technology, National Base of International Science & Technology Cooperation on Hybrid Materials, College of Materials Science and Engineering, Qingdao University, 308 Ningxia Road, Qingdao 266071, China.
| | - Xiaoli Hu
- Institute of Hybrid Materials, National Center of International Joint Research for Hybrid Materials Technology, National Base of International Science & Technology Cooperation on Hybrid Materials, College of Materials Science and Engineering, Qingdao University, 308 Ningxia Road, Qingdao 266071, China.
| | - Jixian Liu
- Institute of Hybrid Materials, National Center of International Joint Research for Hybrid Materials Technology, National Base of International Science & Technology Cooperation on Hybrid Materials, College of Materials Science and Engineering, Qingdao University, 308 Ningxia Road, Qingdao 266071, China.
| | - Xuezhong Gong
- Institute of Hybrid Materials, National Center of International Joint Research for Hybrid Materials Technology, National Base of International Science & Technology Cooperation on Hybrid Materials, College of Materials Science and Engineering, Qingdao University, 308 Ningxia Road, Qingdao 266071, China.
| | - Wenli Miao
- Institute of Hybrid Materials, National Center of International Joint Research for Hybrid Materials Technology, National Base of International Science & Technology Cooperation on Hybrid Materials, College of Materials Science and Engineering, Qingdao University, 308 Ningxia Road, Qingdao 266071, China.
| | - Linliang Ding
- Institute of Hybrid Materials, National Center of International Joint Research for Hybrid Materials Technology, National Base of International Science & Technology Cooperation on Hybrid Materials, College of Materials Science and Engineering, Qingdao University, 308 Ningxia Road, Qingdao 266071, China.
| | - Xinbo Li
- Institute of Hybrid Materials, National Center of International Joint Research for Hybrid Materials Technology, National Base of International Science & Technology Cooperation on Hybrid Materials, College of Materials Science and Engineering, Qingdao University, 308 Ningxia Road, Qingdao 266071, China.
| | - Jianguo Tang
- Institute of Hybrid Materials, National Center of International Joint Research for Hybrid Materials Technology, National Base of International Science & Technology Cooperation on Hybrid Materials, College of Materials Science and Engineering, Qingdao University, 308 Ningxia Road, Qingdao 266071, China.
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7
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Niu RL, Sheng ZM, Xu QM, Chang CK, Huang YS, Han S. Small anatase TiO2 nanoparticles grown on carbon nanocages as anodes for high performance sodium and lithium ion batteries. Chem Phys Lett 2022. [DOI: 10.1016/j.cplett.2022.139350] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
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8
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Haridharan N, Sundar D, Kurrupasamy L, Anandan S, Liu C, Wu JJ. Oil spills adsorption and cleanup by polymeric materials: A review. POLYM ADVAN TECHNOL 2022. [DOI: 10.1002/pat.5636] [Citation(s) in RCA: 4] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/11/2022]
Affiliation(s)
- Neelamegan Haridharan
- Department of Environmental Engineering and Science Feng Chia University Taichung Taiwan
- Department of Chemistry Vel Tech Rangarajan Dr. Sagunthala R & D Institute of Science and Technology Avadi Tamilnadu India
| | - Dhivyasundar Sundar
- Department of Environmental Engineering and Science Feng Chia University Taichung Taiwan
| | - Lakshmanan Kurrupasamy
- Department of Environmental Engineering and Science Feng Chia University Taichung Taiwan
| | - Sambandam Anandan
- Department of Chemistry National Institute of Technology Trichy India
| | - Chen‐Hua Liu
- Department of Environmental Engineering and Science Feng Chia University Taichung Taiwan
| | - Jerry J. Wu
- Department of Environmental Engineering and Science Feng Chia University Taichung Taiwan
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Ghumro S, Lal B, Pirzada T. Visible-Light-Driven Carbon-Doped TiO 2-Based Nanocatalysts for Enhanced Activity toward Microbes and Removal of Dye. ACS OMEGA 2022; 7:4333-4341. [PMID: 35155926 PMCID: PMC8829923 DOI: 10.1021/acsomega.1c06112] [Citation(s) in RCA: 10] [Impact Index Per Article: 5.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 11/01/2021] [Accepted: 01/11/2022] [Indexed: 05/08/2023]
Abstract
Solar-driven photocatalytic approach is an attractive, clean, and effective way for decontamination of water. In this work, visible-light-activated TiO2 nanoflakes (TNFs) and carbon-doped TiO2 nanoflakes (C-TNFs) were synthesized via a facile hydrothermal route using different carbon sources. The as-synthesized nanostructures were successfully characterized by powder X-ray diffraction (XRD), Fourier transform infrared (FT-IR) spectroscopy, scanning electron microscopy (SEM), and transmission electron microscopy (TEM), critically disclosing the anatase nature containing titanium-oxygen having flake/platelet-like morphology with ∼32 nm in size, respectively. The photocatalytic activity was characterized via the degradation of methylene blue (MB) and bacterial inactivation of Escherichia coli (Gram-negative) and Staphylococcus aureus (Gram-positive). The experimental results showed that C-TNFs significantly enhanced photocatalytic activity compared to bare TNFs. It was found that TNF nanocatalysts exhibited superior photocatalytic activity against photodegradation of MB (92.7%) and antibacterial activity (85.6%) under sunlight irradiation. In addition, reduced graphene oxide (RGO)-TNFs have a good recycling ability and are expected to be a promising candidate for photocatalytic applications under sunlight. Consequentially, the higher activity of RGO-TNF nanocatalysts under sunlight irradiation for organic degradation and bacterial inactivation implies that hydrothermal synthesis allows for the preparation of efficient and low-cost carbon-doped photocatalysts for the photodegradation of a wide range of environmental pollutants.
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Balarak D, Mengelizadeh N, Rajiv P, Chandrika K. Photocatalytic degradation of amoxicillin from aqueous solutions by titanium dioxide nanoparticles loaded on graphene oxide. ENVIRONMENTAL SCIENCE AND POLLUTION RESEARCH INTERNATIONAL 2021; 28:49743-49754. [PMID: 33942261 DOI: 10.1007/s11356-021-13525-1] [Citation(s) in RCA: 24] [Impact Index Per Article: 8.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 07/07/2020] [Accepted: 03/15/2021] [Indexed: 05/27/2023]
Abstract
The photocatalytic degradation of amoxicillin (AMX) by titanium dioxide nanoparticles loaded on graphene oxide (GO/TiO2) was evaluated under UV light. Experimental results showed that key parameters such as initial pH, GO/TiO2 dosage, UV intensity, and initial AMX concentration had a significant effect on AMX degradation. Compared to the photolysis and adsorption processes, the AMX degradation efficiency was obtained to be more than 99% at conditions including pH of 6, the GO/TiO2 dosage of 0.4 g/L, the AMX concentration of 50 mg/L, and the intensity of 36 W. Trapping tests showed that all three hydroxyl radical (OH•), superoxide radical (O2•-), and hole (h+) were produced in the photocatalytic process; however, h+ plays a major role in AMX degradation. Under UV irradiation, GO/TiO2 showed excellent stability and recyclability for 4 consecutive reaction cycles. The analysis of total organic carbon (TOC) suggested that AMX could be well degraded into CO2 and H2O. The formation of NH4+, NO3-, and SO42- as a result of AMX degradation confirmed the good mineralization of AMX in the GO/TiO2/UV process. The toxicity of the inlet and outlet samples of the process has been investigated by cultivation of Escherichia coli and Streptococcus faecalis, and the results showed that the condition is suitable for the growth of organisms. The photocatalytic degradation mechanism was proposed based on trapping and comparative tests. Based on the results, the GO/TiO2/UV process can be considered as a promising technique for AMX degradation due to photocatalyst stability, high mineralization efficiency, and effluent low toxicity.
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Affiliation(s)
- Davoud Balarak
- Department of Environmental Health, Health Promotion Research Center, Zahedan University of Medical Sciences, Zahedan, Iran.
| | - Nezamaddin Mengelizadeh
- Research Center of Health, Safety and Environment, Department of Environmental Health Engineering, Evaz Faculty of Health, Larestan University of Medical Sciences, Larestan, Iran
| | - Periakaruppan Rajiv
- Department of Biotechnology, Karpagam Academy of Higher Education, Eachanari post, Coimbatore, Tamil Nadu, 641021, India
| | - Kethineni Chandrika
- Department of Biotechnology, Koneru Lakshmaiah Education Foundation, Vaddeswaram, Guntur, AP, 52250, India.
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Peng Z, Zhang J, Liu P, Claverie J, Siaj M. One-Dimensional CdS/Carbon/Au Plasmonic Nanoarray Photoanodes via In Situ Reduction-Graphitization Approach toward Efficient Solar Hydrogen Evolution. ACS APPLIED MATERIALS & INTERFACES 2021; 13:34658-34670. [PMID: 34254774 DOI: 10.1021/acsami.1c04006] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/13/2023]
Abstract
Photoelectrochemical (PEC) hydrogen evolution has been acknowledged as a promising "green" technique to convert solar energy into clean chemical fuel. Photoanodes play a key role in determining the performance of PEC systems, spurring numerous efforts to develop advanced materials as well as structures to improve the photoconversion efficiency. In this work, we report the rational design of a plasmonic hierarchical nanorod array, composed of oriented one-dimensional (1D) CdS nanorods decorated with a uniformly wrapped graphite-like carbon (CPDA) layer and Au nanoparticles (Au NPs), as highly efficient photoanode materials. An interfacial in situ reduction-graphitization method has been conducted to prepare the CdS/CPDA/Au nanoarchitecture, where polydopamine (PDA) coating was used as a C source and a reductant. The CdS/CPDA/Au nanoarray photoanode demonstrates superior photoconversion efficiency with a photocurrent density of 8.74 mA/cm2 and an IPCE value (480 nm) of 30.2% (at 1.23 V vs RHE), under simulated sunlight irradiation, which are 12.7 and 13.5 times higher than pristine CdS. The significant enhancement of PEC performance is mainly benefited from the increase of the entire quantum yield and efficiency due to the formation of a Schottky rectifier, localized surface plasmon resonance (LSPR)-enhanced light absorption, and promoted hot-electron injection from interlayered graphene-like carbon. More importantly, thanks to the inhibited charge carrier recombination process and transferred oxidation reaction sites, the fabricated CdS/CPDA/Au photoelectrode exhibits lengthened electron lifetimes and better photostability, illustrating its wonderful potential for future PEC application.
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Affiliation(s)
- Zhiyuan Peng
- Department of Chemistry and Biochemistry, Université du Québec à Montréal, Montréal, Quebec H3C 3P8, Canada
| | - Jianming Zhang
- School of Chemistry and Chemical Engineering, Jiangsu University, Zhenjiang, Jiangsu 212013, China
| | - Peipei Liu
- Département de Chimie, Université de Sherbrooke, 2500 Blvd de l'Université, Sherbrooke, J1K2R1 Quebec, Canada
| | - Jerome Claverie
- Département de Chimie, Université de Sherbrooke, 2500 Blvd de l'Université, Sherbrooke, J1K2R1 Quebec, Canada
| | - Mohamed Siaj
- Department of Chemistry and Biochemistry, Université du Québec à Montréal, Montréal, Quebec H3C 3P8, Canada
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da Cunha R, do Carmo Batista WVF, de Oliveira HL, dos Santos AC, dos Reis PM, Borges KB, Martelli PB, Furtado CA, de Fátima Gorgulho H. Carbon Xerogel/TiO2 composites as photocatalysts for acetaminophen degradation. J Photochem Photobiol A Chem 2021. [DOI: 10.1016/j.jphotochem.2021.113248] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/25/2023]
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Abstract
TiO2 has been widely used as a photocatalyst and an electrode material toward the photodegradation of organic pollutants and electrochemical applications, respectively. However, the properties of TiO2 are not enough up to meet practical needs because of its intrinsic disadvantages such as a wide bandgap and low conductivity. Incorporation of carbon into the TiO2 lattice is a promising tool to overcome these limitations because carbon has metal-like conductivity, high separation efficiency of photogenerated electron/hole pairs, and strong visible-light absorption. This review would describe and discuss a variety of strategies to develop carbon-doped TiO2 with enhanced photoelectrochemical performances in environmental, energy, and catalytic fields. Emphasis is given to highlight current techniques and recent progress in C-doped TiO2-based materials. Meanwhile, how to tackle the challenges we are currently facing is also discussed. This understanding will allow the process to continue to evolve and provide facile and feasible techniques for the design and development of carbon-doped TiO2 materials.
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Zhang X, Yuan W, Yang Y, Chen Y, Tang Z, Wang C, Yuan Y, Ye Y, Wu Y, Tang Y. Immobilizing Polysulfide by In Situ Topochemical Oxidation Derivative TiC@Carbon-Included TiO 2 Core-Shell Sulfur Hosts for Advanced Lithium-Sulfur Batteries. SMALL (WEINHEIM AN DER BERGSTRASSE, GERMANY) 2020; 16:e2005998. [PMID: 33258313 DOI: 10.1002/smll.202005998] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 09/24/2020] [Indexed: 06/12/2023]
Abstract
The performance of lithium-sulfur (Li-S) batteries is greatly hindered by the notorious shuttle effect of lithium polysulfides (LiPSs). To address this issue, in situ topochemical oxidation derivative TiC@carbon-included TiO2 (TiC@C-TiO2 ) core-shell composite is designed and proposed as a multifunctional sulfur host, which integrates the merits of conductive TiC core to facilitate the redox reaction kinetics of sulfur species, and porous C-TiO2 shell to suppress the dissolution and shuttling of LiPSs through chemisorption. A unique dual chemical mediation mechanism is demonstrated for the proposed TiC@C-TiO2 composite that synergistically entraps LiPSs through thiosulfate/polythionate conversion coupled with strong polar-polar interaction. The morphological characterization reveals that the TiC@C-TiO2 -based cathode can well regulate the distribution of electrode materials to retard their accumulation inside the electrode, ensuring effective contact between the active materials and electrolyte. Based on its unique function and structure, the cathode delivers an improved capacity of 1256 mAh g-1 at 0.2C, a remarkable rate capability of 643 mAh g-1 , and an ultralow capacity decay rate of 0.065% per cycle at 2C over 900 cycles. This work not only demonstrates a dual chemical mediation mechanism to immobilize LiPSs, but also provides a universal strategy to construct multifunctional sulfur hosts for advanced Li-S batteries.
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Affiliation(s)
- Xiaoqing Zhang
- School of Mechanical and Automotive Engineering, South China University of Technology, Guangzhou, 510640, China
| | - Wei Yuan
- School of Mechanical and Automotive Engineering, South China University of Technology, Guangzhou, 510640, China
| | - Yang Yang
- School of Mechanical and Automotive Engineering, South China University of Technology, Guangzhou, 510640, China
| | - Yu Chen
- School of Environment and Energy, South China University of Technology, Guangzhou, 510006, China
| | - Zhenghua Tang
- School of Environment and Energy, South China University of Technology, Guangzhou, 510006, China
| | - Chun Wang
- School of Mechanical and Automotive Engineering, South China University of Technology, Guangzhou, 510640, China
| | - Yuhang Yuan
- School of Mechanical and Automotive Engineering, South China University of Technology, Guangzhou, 510640, China
| | - Yintong Ye
- School of Mechanical and Automotive Engineering, South China University of Technology, Guangzhou, 510640, China
| | - Yaopeng Wu
- School of Mechanical and Automotive Engineering, South China University of Technology, Guangzhou, 510640, China
| | - Yong Tang
- School of Mechanical and Automotive Engineering, South China University of Technology, Guangzhou, 510640, China
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15
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Shen L, Xu G, Han B, Ge H, Kato S, Dai Y, Wang K, Sun F, Zhou W. Fabricating and Evaluating the Sterilization Effect of Composite Coal-Tar Pitch-Based Spherical Activated Carbon (TiO 2/CB/Coal-Tar-Pitch-SAC). JOURNAL OF CHEMICAL ENGINEERING OF JAPAN 2020. [DOI: 10.1252/jcej.20we048] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/11/2022]
Affiliation(s)
- Lianzhong Shen
- Key Laboratory of Energy Materials and Electrochemistry Research Liaoning Province, School of Chemical Engineering, University of Science and Technology Liaoning
| | - Guiying Xu
- Key Laboratory of Energy Materials and Electrochemistry Research Liaoning Province, School of Chemical Engineering, University of Science and Technology Liaoning
| | - Beibei Han
- Advanced Science Research Laboratory, Saitama Institute of Technology
| | - Hui Ge
- Qidian photocatlyst Co., Ltd
| | | | | | - Kun Wang
- Key Laboratory of Energy Materials and Electrochemistry Research Liaoning Province, School of Chemical Engineering, University of Science and Technology Liaoning
| | - Fei Sun
- Key Laboratory of Energy Materials and Electrochemistry Research Liaoning Province, School of Chemical Engineering, University of Science and Technology Liaoning
| | - Weimin Zhou
- Key Laboratory of Energy Materials and Electrochemistry Research Liaoning Province, School of Chemical Engineering, University of Science and Technology Liaoning
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16
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Synthesis of Superior Visible-Light-Driven Nanophotocatalyst Using High Surface Area TiO2 Nanoparticles Decorated with CuxO Particles. Catalysts 2020. [DOI: 10.3390/catal10080872] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/08/2023] Open
Abstract
This work provides an alternate unique simple methodology to design and synthesize chemically modified nanophotocatalyst based on high surface area TiO2 nanoparticles that can be used efficiently for the photodegradation of organic pollutants under normal visible light rather than complicated UV irradiation. In this study, dual visible light and UV-driven nanophotocatalysts were synthesized via wet chemistry procedures using high surface area TiO2 nanoparticles functionalized with (3-Aminopropyl) trimethoxysilane and attached chemically to the CuXO to improve the charge separation and maintain the non-charge recombination. The successful modification of the TiO2 nanoparticles and the formation of the TiO2-NH2-CuxO nanophotocatalyst were confirmed using different characterization techniques, and the results revealed the synthesis of high surface area TiO2 nanoparticles, and their chemical modification with an amino group and further decoration with copper to produce TiO2-NH2-CuxO nanophotocatalyst. The photocatalytic activity of TiO2 and TiO2-NH2-CuxO nanophotocatalyst were evaluated using methylene blue (MB) dye; as an example of organic pollutants. The resulting TiO2-NH2-CuxO nanophotocatalyst exhibited superior photocatalytic activity for the degradation of MB dye under visible light irradiation, due to the reduction in the energy bandgap. The degradation of the MB dye using the TiO2-NH2-CuxO nanophotocatalyst was investigated using LC-MS, and the results revealed that the hydroxyl free radical is mainly responsible for the cleavage and the degradation of the MB dye.
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17
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Li L, Zhang Y, Yan Z, Chen M, Zhang L, Zhao P, Yu J. Ultrasensitive Photoelectrochemical Detection of MicroRNA on Paper by Combining a Cascade Nanozyme-Engineered Biocatalytic Precipitation Reaction and Target-Triggerable DNA Motor. ACS Sens 2020; 5:1482-1490. [PMID: 32362115 DOI: 10.1021/acssensors.0c00632] [Citation(s) in RCA: 51] [Impact Index Per Article: 12.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/06/2023]
Abstract
Developing efficient strategies for sensitive detection of microRNAs, the noncoding bioactive molecules and well-established biomarkers, has aroused great interests due to its great potential values in genetic and pathological analyses. Herein, a highly selective and disposable paper-based photoelectrochemical (PEC) sensor was rationally designed for sensing microRNA based on simple self-assembly of a target-triggerable DNA motor and nanozyme-catalyzed multistage biocatalytic precipitation reaction. Specifically, a brand-new type II heterojunction of TiO2-CeO2 nanotubes decorated with carbon fiber paper (CFP) was first prepared, which gave an enhanced photoreactive surface and realized fast electron transport and extraction, markedly accelerating photoelectric conversion efficiency of the sensor. For achieving target detection, cascade nanozyme centers of the CeO2 and Au nanoparticles modified by cyclodextrin were drafted, greatly decreasing the photocurrent intensity and achieving an ultralow background signal. With target introduction, the DNA motor was activated and automatically moved along the predesigned route driven by an endonuclease cleavage reaction, resulting in more substrate probe digestion and nanozyme release from CFP. Consequently, the repressive inner enhancement mechanism was gradually renewed with constant advancement of the enzymatic reaction and walker probe walking progressively, eventually allowing multiple enzymatic factor output in each target import. As a proof-of-concept application, the developed PEC sensor successfully performed detection of miRNA-141, showing a low detection limit of 0.6 fM, and was further applied to real sample bioassays with satisfying results. This work proposes promising strategies to boost the catalytic cascade DNA-motor adhibition in biological samples analysis and also exhibits potential capability in detection of other targets.
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Affiliation(s)
- Li Li
- School of Chemistry and Chemical Engineering, University of Jinan, Jinan 250022, P. R. China
| | - Yan Zhang
- School of Chemistry and Chemical Engineering, University of Jinan, Jinan 250022, P. R. China
| | - Zhao Yan
- School of Chemistry and Chemical Engineering, University of Jinan, Jinan 250022, P. R. China
| | - Mengqi Chen
- School of Chemistry and Chemical Engineering, University of Jinan, Jinan 250022, P. R. China
| | - Lina Zhang
- Shandong Provincial Key Laboratory of Preparation and Measurement of Building Materials, University of Jinan, Jinan 250022, P. R. China
| | - Peini Zhao
- School of Chemistry and Chemical Engineering, University of Jinan, Jinan 250022, P. R. China
| | - Jinghua Yu
- School of Chemistry and Chemical Engineering, University of Jinan, Jinan 250022, P. R. China
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18
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Chen S, Gao H, Han M, Chen X, Zhang X, Dong W, Wang G. In‐situ Self‐transformation Synthesis of N‐doped Carbon Coating Paragenetic Anatase/Rutile Heterostructure with Enhanced Photocatalytic CO
2
Reduction Activity. ChemCatChem 2020. [DOI: 10.1002/cctc.202000137] [Citation(s) in RCA: 8] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/25/2022]
Affiliation(s)
- Siyuan Chen
- Beijing Advanced Innovation Center for Materials Genome EngineeringBeijing Key Laboratory of Function Materials for Molecule & Structure ConstructionSchool of Materials Science and EngineeringUniversity of Science and Technology Beijing Beijing 100083 P.R. China
| | - Hongyi Gao
- Beijing Advanced Innovation Center for Materials Genome EngineeringBeijing Key Laboratory of Function Materials for Molecule & Structure ConstructionSchool of Materials Science and EngineeringUniversity of Science and Technology Beijing Beijing 100083 P.R. China
| | - Mengyi Han
- Institute of Advanced MaterialsBeijing Normal University Beijing 100875 P.R. China
| | - Xiao Chen
- Institute of Advanced MaterialsBeijing Normal University Beijing 100875 P.R. China
| | - Xiaowei Zhang
- Institute of Advanced MaterialsBeijing Normal University Beijing 100875 P.R. China
| | - Wenjun Dong
- Beijing Advanced Innovation Center for Materials Genome EngineeringBeijing Key Laboratory of Function Materials for Molecule & Structure ConstructionSchool of Materials Science and EngineeringUniversity of Science and Technology Beijing Beijing 100083 P.R. China
| | - Ge Wang
- Beijing Advanced Innovation Center for Materials Genome EngineeringBeijing Key Laboratory of Function Materials for Molecule & Structure ConstructionSchool of Materials Science and EngineeringUniversity of Science and Technology Beijing Beijing 100083 P.R. China
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19
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Morawski A, Staciwa P, Sibera D, Moszyński D, Zgrzebnicki M, Narkiewicz U. Nanocomposite Titania-Carbon Spheres as CO 2 and CH 4 Sorbents. ACS OMEGA 2020; 5:1966-1973. [PMID: 32039333 PMCID: PMC7003509 DOI: 10.1021/acsomega.9b03806] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Figures] [Subscribe] [Scholar Register] [Received: 11/08/2019] [Accepted: 01/03/2020] [Indexed: 06/10/2023]
Abstract
Photocatalysis can offer solutions for the transformation of greenhouse gases, such as methane and carbon dioxide. In the paper, a candidate for such a photocatalyst is presented, based on a composite of titania with carbon spheres. The material was obtained using microwave assisted solvothermal synthesis, enabling good dispersion of titania. The studies of carbon dioxide and methane adsorption were performed under ambient pressure and temperatures of 40, 60, and 80 °C. The effect of temperature increase was less favorable for carbon dioxide than for methane. Satisfying values of carbon dioxide and methane uptake were obtained-3.94 mmol CO2/g and 2.77 mmol CH4/g at 40 °C.
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20
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Chauhan A, Sharma M, Kumar S, Thirumalai S, Kumar RV, Vaish R. TiO 2@C core@shell nanocomposites: A single precursor synthesis of photocatalyst for efficient solar water treatment. JOURNAL OF HAZARDOUS MATERIALS 2020; 381:120883. [PMID: 31369935 DOI: 10.1016/j.jhazmat.2019.120883] [Citation(s) in RCA: 13] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 03/23/2019] [Revised: 07/08/2019] [Accepted: 07/09/2019] [Indexed: 06/10/2023]
Abstract
This study reports the facile synthesis of highly photoactive TiO2@C core@shell nanocomposites through a single alkoxide precursor. TiO2 and carbon-based hybrid nanomaterials are popular photocatalysts owing to their abundance, low toxicity, and high stability, making them strong candidates for practical solar water-treatment applications. However, synthesis of such nanomaterials is often a multi-step process and requires careful control of the external carbon source for producing the desired morphology. In this regard, this study reports the synthesis of well-dispersed TiO2@C nanocomposites without the need of an external carbon source. The resulting photocatalyst was employed for treatment of various water-borne pollutants including several dyes, pharmaceuticals, and pathogens. Rapid mineralization of pollutants could be achieved even with low amounts of catalyst, with the performance well exceeding that of pristine TiO2 and P25 Degussa. Results indicate that incorporation of C increases visible-light absorption and greatly improves the separation of photogenerated charge carriers. Given the facile synthesis and the wide scope of operation, the proposed catalyst could be a significant step towards practical photocatalytic solar water-treatment.
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Affiliation(s)
- Aditya Chauhan
- Department of Materials Science and Metallurgy, University of Cambridge, Cambridge, CB3 0FS, UK.
| | - Moolchand Sharma
- School of Engineering, Indian Institute of Technology Mandi, Mandi, 175 001, India
| | - Sandeep Kumar
- School of Engineering, Indian Institute of Technology Mandi, Mandi, 175 001, India
| | - Sundararajan Thirumalai
- Department of Materials Science and Metallurgy, University of Cambridge, Cambridge, CB3 0FS, UK
| | | | - Rahul Vaish
- School of Engineering, Indian Institute of Technology Mandi, Mandi, 175 001, India
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21
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Wang Q, Gao Q, Al-Enizi AM, Nafady A, Ma S. Recent advances in MOF-based photocatalysis: environmental remediation under visible light. Inorg Chem Front 2020. [DOI: 10.1039/c9qi01120j] [Citation(s) in RCA: 233] [Impact Index Per Article: 58.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/18/2022]
Abstract
Highly photoactive MOFs can be engineered via various strategies for the purpose of extended visible light absorption, more efficient generation, separation and transfer of charge carriers, as well as good recyclability.
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Affiliation(s)
- Qi Wang
- School of Environmental Science and Engineering
- Zhejiang Gongshang University
- Hangzhou 310018
- China
- Department of Chemistry
| | - Qiaoyuan Gao
- School of Environmental Science and Engineering
- Zhejiang Gongshang University
- Hangzhou 310018
- China
| | | | - Ayman Nafady
- Chemistry Department
- College of Science
- King Saud University
- Riyadh
- Saudi Arabia
| | - Shengqian Ma
- Department of Chemistry
- University of South Florida
- Tampa
- USA
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22
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Ma S, Gu J, Han Y, Gao Y, Zong Y, Ye Z, Xue J. Facile Fabrication of C-TiO 2 Nanocomposites with Enhanced Photocatalytic Activity for Degradation of Tetracycline. ACS OMEGA 2019; 4:21063-21071. [PMID: 31867498 PMCID: PMC6921265 DOI: 10.1021/acsomega.9b02411] [Citation(s) in RCA: 12] [Impact Index Per Article: 2.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 07/30/2019] [Accepted: 11/18/2019] [Indexed: 05/21/2023]
Abstract
Visible-lightdriven C-TiO2 nanocomposites were prepared via a simple calcination and acid etching process. The C-TiO2 nanocomposites were characterized by X-ray photoelectron spectroscopy, Raman spectroscopy, X-ray diffraction, transmission electron microscopy, and high-resolution TEM. The results showed that TiO2 nanoparticles were combined with a porous carbon layer through surface C-O groups, which facilitates the strong interface interaction. The interface combination of nano-TiO2 and carbon material increases the specific surface area of nano-TiO2, widens the range of light response, and improves the efficiency of light-induced electron migration. The visible-light photocatalytic activity of the prepared photocatalyst was evaluated by the decomposition of tetracycline aqueous solution. Compared with that of pure TiO2, the photocatalytic activity of C-TiO2 nanocomposites was significantly improved. Furthermore, a possible photocatalytic mechanism was also tentatively proposed. This work can promote the development of active photocatalysts under solar light for the photodegradation of environmental pollutants.
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Affiliation(s)
- Shuaishuai Ma
- College
of Chemistry and Environmental Engineering, Jiangsu University of Technology, Changzhou 213001, P. R. China
| | - Jiandong Gu
- College
of Chemistry and Environmental Engineering, Jiangsu University of Technology, Changzhou 213001, P. R. China
| | - Yingxia Han
- College
of Chemistry and Environmental Engineering, Jiangsu University of Technology, Changzhou 213001, P. R. China
| | - Yuan Gao
- College
of Chemistry and Environmental Engineering, Jiangsu University of Technology, Changzhou 213001, P. R. China
| | - Yuqing Zong
- School
of Environmental and Safety Engineering, Changzhou University, Changzhou 213164, P. R. China
| | - Zhaolian Ye
- College
of Chemistry and Environmental Engineering, Jiangsu University of Technology, Changzhou 213001, P. R. China
- E-mail: (Z.Y.)
| | - Jinjuan Xue
- School
of Environmental and Safety Engineering, Changzhou University, Changzhou 213164, P. R. China
- E-mail: (J.X.)
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23
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Lee T, Bui HT, Yoo J, Ra M, Han SH, Kim W, Kwon W. Formation of TiO 2@Carbon Core/Shell Nanocomposites from a Single Molecular Layer of Aromatic Compounds for Photocatalytic Hydrogen Peroxide Generation. ACS APPLIED MATERIALS & INTERFACES 2019; 11:41196-41203. [PMID: 31617703 DOI: 10.1021/acsami.9b10015] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/10/2023]
Abstract
In this article, we demonstrate that TiO2@carbon core/shell (TiO2@C) nanocomposite photocatalysts prepared by carbonizing a single molecular layer of aromatic compounds adsorbed on the surface of TiO2 nanoparticles selectively enhance the generation of hydrogen peroxide (H2O2). Atomically thin carbon shells have been formed directly on the surface of TiO2 nanoparticles through pyrolytic decarboxylation of the adsorbed aromatic compounds, benzoic acid (BA), and 1-naphthoic acid (NA), which yields two types of TiO2@C nanocomposites, TiO2@C(BA) and TiO2@C(NA). Raman spectroscopy shows that the as-obtained nanocomposites have similar degrees of graphitization (D/G band ratio), regardless of the type of aromatic precursors, but TiO2@C(NA) contains more oxygenic species than TiO2@C(BA) (D*/G band ratio). Such oxygenic species predominantly exist in the form of epoxide groups, as determined by attenuated total reflection infrared spectroscopy. The sp2 carbon atoms near the epoxide groups in the carbon shell can act as active sites for the two-electron reduction of O2. Therefore, TiO2@C(NA) can generate H2O2 more efficiently than TiO2@C(BA). Furthermore, the carbon shells retard the reconsumption of the generated H2O2 by inhibiting the adsorption of H2O2 on the surface of TiO2 nanoparticles, thereby improving the photocatalytic efficiency of H2O2 generation. Finally, we have shown the durability and reproducibility of our TiO2@C-based photocatalytic systems. We believe that our research may offer a potentially improved strategy for H2O2 generation and other photocatalytic applications.
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Affiliation(s)
- Taehyung Lee
- Department of Chemical Engineering , Pohang University of Science and Technology (POSTECH) , 77 Cheongam-ro , Nam-gu, Pohang 37673 , South Korea
| | | | - Jounghyun Yoo
- Department of Chemical Engineering , Pohang University of Science and Technology (POSTECH) , 77 Cheongam-ro , Nam-gu, Pohang 37673 , South Korea
| | - Mirae Ra
- Center for Environment & Sustainable Resources , Korea Research Institute of Chemical Technology (KRICT) , 141 Gajeong-ro , Yuseong-gu, Daejeon 34114 , South Korea
- Department of Advanced Materials and Chemical Engineering , University of Science and Technology (UST) , 217 Gajeong-ro , Yuseong-gu, Daejeon 34113 , South Korea
| | - Seung Hwan Han
- LIG Nex1 Company, Limited , 207 Mabuk-ro , Giheung-gu, Yongin-si , Gyeonggi-do 13488 , South Korea
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24
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Zhang X, Xue P, Jia J, Hu X, Fan J, Liu E. Efficient photoelectrochemical water-splitting over carbon membrane linked Au and TiO 2 nanotube arrays film based on multiple carriers transport paths. NANOTECHNOLOGY 2019; 30:435403. [PMID: 31342936 DOI: 10.1088/1361-6528/ab34ee] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/10/2023]
Abstract
Herein, a carbon membrane and Au nanoparticles were combined to improve the efficiency of photoelectrocatalytic water splitting over a TiO2 nanotube arrays film (TiO2 NTAF). Two different ternary nanostructures were constructed by hydrothermal and photochemical deposition processes. One was carbon membrane bridged Au nanoparticles and TiO2 nanotube arrays (Au/C/TiO2 NTAF), while the other was Au nanoparticles sandwiched between carbon membrane and TiO2 nanotube arrays (C/Au/TiO2 NTAF). The two structures exhibited enhanced visible light harvesting ability, but they showed distinctly different photoelectric properties. The unique microstructure of C/Au/TiO2 NTAF resulted in a much higher reduction of the electron cloud density of Au nanoparticles as carrier recombination centers, which were responsible for its poor photoelectrochemical performance. However, a champion photocurrent of Au/C/TiO2 NTAF was observed (0.984 mA cm-2), indicating superior ability of the photoelectrocatalytic water splitting. The great enhancement was attributed to multiple carriers transport paths, which can efficiently utilize the sensitization of the carbon membrane and the surface plasmon resonance effect of the Au nanoparticles.
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Affiliation(s)
- Xiaozhuo Zhang
- School of Chemical Engineering, Northwest University, Xi'an 710069, People's Republic of China
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25
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Li JF, Zhong CY, Huang JR, Chen Y, Wang Z, Liu ZQ. Carbon dots decorated three-dimensionally ordered macroporous bismuth-doped titanium dioxide with efficient charge separation for high performance photocatalysis. J Colloid Interface Sci 2019; 553:758-767. [DOI: 10.1016/j.jcis.2019.06.077] [Citation(s) in RCA: 25] [Impact Index Per Article: 5.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/16/2019] [Revised: 06/12/2019] [Accepted: 06/23/2019] [Indexed: 10/26/2022]
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26
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Wu B, Li Y, Su K, Tan L, Liu X, Cui Z, Yang X, Liang Y, Li Z, Zhu S, Yeung KWK, Wu S. The enhanced photocatalytic properties of MnO 2/g-C 3N 4 heterostructure for rapid sterilization under visible light. JOURNAL OF HAZARDOUS MATERIALS 2019; 377:227-236. [PMID: 31170571 DOI: 10.1016/j.jhazmat.2019.05.074] [Citation(s) in RCA: 67] [Impact Index Per Article: 13.4] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 01/25/2019] [Revised: 03/23/2019] [Accepted: 05/26/2019] [Indexed: 05/21/2023]
Abstract
Herein, a heterostructure based on MnO2 and g-C3N4 was constructed on the surface of metallic Ti implants, in which MnO2 favored the transfer and separation of free charges to enhance the photoconversion efficiency of g-C3N4 by 21.11%. Consequently, the yield of ROS was promoted significantly, which denatured protein and damaged DNA to kill bacteria efficiently. In addition, glutathione (GSH, l-γ-glutamyl-l-cysteinyl-glycine) defending oxidative stress in bacteria, was oxidized by MnO2 in the hybrid coating once the bacterial membrane was disrupted by ROS. Hence, after visible light irradiation for 20 min, MnO2/g-C3N4 coating exhibited superior disinfection efficacy of 99.96% and 99.26% against S. aureus and E. coli severally. This work provided a practical sterilization strategy about MnO2/g-C3N4 systems through the synergistic effects of enhanced photodynamic antibacterial therapy and oxidization effect of MnO2 with great biosafety, in which MnO2 enhanced the photocatalyst property of g-C3N4 to generate more ROS and deplete GSH to improve antibacterial efficiency. It will bring more insight into rapid and highly effective disinfection and antibacterial strategy without using traditional high-temperature, ultraviolet ray and antibiotics that cause side-effects.
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Affiliation(s)
- Beibei Wu
- Ministry-of-Education Key Laboratory for the Green Preparation and Application of Functional Materials, Hubei Key Laboratory of Polymer Materials, School of Materials Science & Engineering, Hubei University, Wuhan 430062, China
| | - Yuan Li
- Ministry-of-Education Key Laboratory for the Green Preparation and Application of Functional Materials, Hubei Key Laboratory of Polymer Materials, School of Materials Science & Engineering, Hubei University, Wuhan 430062, China
| | - Kun Su
- Ministry-of-Education Key Laboratory for the Green Preparation and Application of Functional Materials, Hubei Key Laboratory of Polymer Materials, School of Materials Science & Engineering, Hubei University, Wuhan 430062, China
| | - Lei Tan
- Ministry-of-Education Key Laboratory for the Green Preparation and Application of Functional Materials, Hubei Key Laboratory of Polymer Materials, School of Materials Science & Engineering, Hubei University, Wuhan 430062, China
| | - Xiangmei Liu
- Ministry-of-Education Key Laboratory for the Green Preparation and Application of Functional Materials, Hubei Key Laboratory of Polymer Materials, School of Materials Science & Engineering, Hubei University, Wuhan 430062, China.
| | - Zhenduo Cui
- School of Materials Science & Engineering, The Key Laboratory of Advanced Ceramics and Machining Technology by the Ministry of Education of China, Tianjin University, Tianjin 300072, China
| | - Xianjin Yang
- School of Materials Science & Engineering, The Key Laboratory of Advanced Ceramics and Machining Technology by the Ministry of Education of China, Tianjin University, Tianjin 300072, China
| | - Yanqin Liang
- School of Materials Science & Engineering, The Key Laboratory of Advanced Ceramics and Machining Technology by the Ministry of Education of China, Tianjin University, Tianjin 300072, China
| | - Zhaoyang Li
- School of Materials Science & Engineering, The Key Laboratory of Advanced Ceramics and Machining Technology by the Ministry of Education of China, Tianjin University, Tianjin 300072, China
| | - Shengli Zhu
- School of Materials Science & Engineering, The Key Laboratory of Advanced Ceramics and Machining Technology by the Ministry of Education of China, Tianjin University, Tianjin 300072, China
| | - Kelvin Wai Kwok Yeung
- Department of Orthopaedics & Traumatology, Li Ka Shing Faculty of Medicine, The University of Hong Kong, Pokfulam 999077, Hong Kong, China
| | - Shuilin Wu
- Ministry-of-Education Key Laboratory for the Green Preparation and Application of Functional Materials, Hubei Key Laboratory of Polymer Materials, School of Materials Science & Engineering, Hubei University, Wuhan 430062, China; School of Materials Science & Engineering, The Key Laboratory of Advanced Ceramics and Machining Technology by the Ministry of Education of China, Tianjin University, Tianjin 300072, China.
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27
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Reddy KR, Reddy CV, Nadagouda MN, Shetti NP, Jaesool S, Aminabhavi TM. Polymeric graphitic carbon nitride (g-C 3N 4)-based semiconducting nanostructured materials: Synthesis methods, properties and photocatalytic applications. JOURNAL OF ENVIRONMENTAL MANAGEMENT 2019; 238:25-40. [PMID: 30844543 DOI: 10.1016/j.jenvman.2019.02.075] [Citation(s) in RCA: 138] [Impact Index Per Article: 27.6] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 01/04/2019] [Revised: 02/12/2019] [Accepted: 02/16/2019] [Indexed: 05/06/2023]
Abstract
In recent years, various facile and low-cost methods have been developed for the synthesis of advanced nanostructured photocatalytic materials. These catalysts are required to mitigate the energy crisis, environmental deterioration, including water and air pollution. Among the various semiconductors explored, recently novel classes of polymeric graphitic carbon nitride (g-C3N4)-based heterogeneous photocatalysts have established much greater importance because of their unique physiochemical properties, large surface area, low price, and long service life, ease of synthesis, product scalability, controllable band gap properties, low toxicity, and high photocatalytic activity. The present comprehensive review focuses on recent achievements in a number of facile chemical synthesis methods for semiconducting polymeric carbon nitrides and their heterogeneous nanohybrids with various dopants, nanostructured metals, metal oxides, and nanocarbons, as well as the parameters influencing their physiochemical properties and photocatalytic efficiency, which are discussed with reference to various catalytic applications such as air (NOx) purification, wastewater treatment, hydrogen generation, CO2 reduction, and chemical transformation. The mechanisms for the superior photocatalytic activity of polymeric g-C3N4-based heterogeneous photocatalysts are also discussed. Finally, the challenges, prospects, and future directions for photocatalytic polymeric g-C3N4-based semiconducting materials are described.
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Affiliation(s)
- Kakarla Raghava Reddy
- School of Chemical and Biomolecular Engineering, The University of Sydney, Sydney, NSW 2006, Australia
| | - Ch Venkata Reddy
- School of Mechanical Engineering, Yeungnam University, Gyeongsan, 712-749, South Korea
| | - Mallikarjuna N Nadagouda
- Department of Mechanical and Materials Engineering, Wright State University, Dayton, OH 45324, United States
| | - Nagaraj P Shetti
- Department of Chemistry, K. L. E. Institute of Technology, Gokul, Hubballi, 580030, Affiliated to Visvesvaraya Technological University, Karnataka, India
| | - Shim Jaesool
- School of Mechanical Engineering, Yeungnam University, Gyeongsan, 712-749, South Korea.
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Liu E, Xu C, Jin C, Fan J, Hu X. Carbon quantum dots bridged TiO2 and Cd0.5Zn0.5S film as solid-state Z-scheme photocatalyst with enhanced H2 evolution activity. J Taiwan Inst Chem Eng 2019. [DOI: 10.1016/j.jtice.2019.02.027] [Citation(s) in RCA: 28] [Impact Index Per Article: 5.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/27/2022]
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29
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Enhanced photocatalytic activity of a mesoporous TiO2 aerogel decorated onto three-dimensional carbon foam. J Mol Liq 2019. [DOI: 10.1016/j.molliq.2018.12.080] [Citation(s) in RCA: 42] [Impact Index Per Article: 8.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/23/2022]
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Xu C, Jin C, Chang W, Hu X, Deng H, Liu E, Fan J. Interfacially bonded CuCo2O4/TiO2 nanosheet heterostructures for boosting photocatalytic H2 production. Catal Sci Technol 2019. [DOI: 10.1039/c9cy01209e] [Citation(s) in RCA: 35] [Impact Index Per Article: 7.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/15/2022]
Abstract
The CuCo2O4/TiO2 nanosheets adopting interfacial chemical bonding exhibit outstanding photocatalytic activity toward water splitting.
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Affiliation(s)
- Chenhui Xu
- School of Chemical Engineering
- Northwest University
- Xi'an 710069
- P. R. China
| | - Chenyang Jin
- School of Chemical Engineering
- Northwest University
- Xi'an 710069
- P. R. China
| | - Wenxi Chang
- School of Chemical Engineering
- Northwest University
- Xi'an 710069
- P. R. China
| | - Xiaoyun Hu
- School of Physics
- Northwest University
- Xi'an 710069
- P. R. China
| | - Hui Deng
- College of Life Sciences
- Northwest University
- Xi'an 710069
- P. R. China
| | - Enzhou Liu
- School of Chemical Engineering
- Northwest University
- Xi'an 710069
- P. R. China
| | - Jun Fan
- School of Chemical Engineering
- Northwest University
- Xi'an 710069
- P. R. China
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31
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Zhang Y, Chen J, Tang H, Xiao Y, Qiu S, Li S, Cao S. Hierarchically-structured SiO 2-Ag@TiO 2 hollow spheres with excellent photocatalytic activity and recyclability. JOURNAL OF HAZARDOUS MATERIALS 2018; 354:17-26. [PMID: 29723759 DOI: 10.1016/j.jhazmat.2018.04.047] [Citation(s) in RCA: 41] [Impact Index Per Article: 6.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 01/27/2018] [Revised: 04/13/2018] [Accepted: 04/20/2018] [Indexed: 06/08/2023]
Abstract
A new protocol for constructing sandwich-like SiO2-Ag@TiO2 hollow spheres (SAT) is introduced, in which SiO2 acts as an efficient support for the Ag nanoparticles (Ag NPs) immobilization, while TiO2 maintains its hierarchical structure and prevents the aggregation of Ag NPs during the photocatalytic reaction. As a photocatalytic agent, the inner and outer surfaces of TiO2 can be fully occupied by pollutants molecules because of its unique structure, which faster boosts the photo-generated electrons to transfer the substrates, leading to an enhanced photocatalytic performance. Compared with Ag NPs deposited on the surface of SiO2@TiO2 (STA), the as-synthesized SAT exhibits a markedly enhanced visible-light and UV light activity than STA for degrading tetracycline and traditional dyes. The excellent photocatalytic performances are ascribed to the enhanced transport paths of photo-generated electrons, reduced recombination probability of e-/h+ pairs, and decreased threat of oxidation and corrosion. Especially, the SAT still maintains its photocatalytic efficiency after five consecutive runs even though the sample is recovered under visible-light irradiation, far beyond the reusability of STA under the same conditions. Therefore, the outstanding photocatalytic activity and excellent recyclability make SAT more potential to purify aquatic contaminants and to meet the demands of future environmental issues.
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Affiliation(s)
- Ying Zhang
- Institute of Polymer Materials, School of Materials Science and Engineering, Jiangsu University, Zhenjiang 212013, China; School of Chemistry and Materials Engineering, Fuyang Normal College, Fuyang 236037, China
| | - Juanrong Chen
- School of Environment and Safety Engineering, Jiangsu University, Zhenjiang 212013, China.
| | - Hua Tang
- Institute of Polymer Materials, School of Materials Science and Engineering, Jiangsu University, Zhenjiang 212013, China
| | - Yingguan Xiao
- Institute of Polymer Materials, School of Materials Science and Engineering, Jiangsu University, Zhenjiang 212013, China
| | - Shoufei Qiu
- Institute of Polymer Materials, School of Materials Science and Engineering, Jiangsu University, Zhenjiang 212013, China
| | - Songjun Li
- Institute of Polymer Materials, School of Materials Science and Engineering, Jiangsu University, Zhenjiang 212013, China
| | - Shunsheng Cao
- Institute of Polymer Materials, School of Materials Science and Engineering, Jiangsu University, Zhenjiang 212013, China; School of Chemistry and Materials Engineering, Fuyang Normal College, Fuyang 236037, China.
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32
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Jiang D, Du X, Zhou L, Li H, Wang K. TiO2 nanoparticles embedded in borocarbonitrides nanosheets for sensitive and selective photoelectrochemical aptasensing of bisphenol A. J Electroanal Chem (Lausanne) 2018. [DOI: 10.1016/j.jelechem.2018.04.042] [Citation(s) in RCA: 12] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/28/2022]
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33
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Li L, Wang T, Zhang Y, Xu C, Zhang L, Cheng X, Liu H, Chen X, Yu J. Editable TiO 2 Nanomaterial-Modified Paper in Situ for Highly Efficient Detection of Carcinoembryonic Antigen by Photoelectrochemical Method. ACS APPLIED MATERIALS & INTERFACES 2018; 10:14594-14601. [PMID: 29638108 DOI: 10.1021/acsami.8b03632] [Citation(s) in RCA: 40] [Impact Index Per Article: 6.7] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/08/2023]
Abstract
In this work, a versatile photoelectrochemical paper-based sensor based on N-carbon dots/TiO2-Pt-modified paper in situ is developed for sensitive detection of carcinoembryonic antigen (CEA) in clinical serum samples. Interconnected cellulose fibers on paper provide a porous, 3D, and flexible substrate for photoelectrochemical sensing. In situ modification of N-carbon dots/TiO2-Pt with editable structures on paper significantly increases the conductivity, widens the adsorption range, and enhances the photoelectrochemical ability, which enables the higher sensitivity and flexibility compared with traditional rigid sensors. On the basis of this novel protocol, a miniaturized and portable origami device realizes the CEA determination with a low detection limit of 1.0 pg mL-1 and a wide linear range from 0.002 to 200 ng mL-1. Thanks to the good biocompatibility, the paper-based device provides a new avenue for the detection of CEA on the cell surface which is promising for portable diagnostics in early tumor warning.
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Affiliation(s)
| | - Ting Wang
- School of Materials Science and Engineering , Nanyang Technological University , 639798 , Singapore
| | | | - Caixia Xu
- Institute for Advanced Interdisciplinary Research , University of Jinan , Jinan 250022 , China
| | | | | | - Hong Liu
- Institute for Advanced Interdisciplinary Research , University of Jinan , Jinan 250022 , China
| | - Xiaodong Chen
- School of Materials Science and Engineering , Nanyang Technological University , 639798 , Singapore
| | - Jinghua Yu
- Institute for Advanced Interdisciplinary Research , University of Jinan , Jinan 250022 , China
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34
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Zhang X, Zhang X, Wang X, Liu L, Ye J, Wang D. Enhancing the photocatalytic activity and photostability of zinc oxide nanorod arrays via graphitic carbon mediation. CHINESE JOURNAL OF CATALYSIS 2018. [DOI: 10.1016/s1872-2067(18)63010-4] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 10/17/2022]
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35
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Wang T, Jiang Z, An T, Li G, Zhao H, Wong PK. Enhanced Visible-Light-Driven Photocatalytic Bacterial Inactivation by Ultrathin Carbon-Coated Magnetic Cobalt Ferrite Nanoparticles. ENVIRONMENTAL SCIENCE & TECHNOLOGY 2018; 52:4774-4784. [PMID: 29578698 DOI: 10.1021/acs.est.7b06537] [Citation(s) in RCA: 26] [Impact Index Per Article: 4.3] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/08/2023]
Abstract
Ultrathin hydrothermal carbonation carbon (HTCC)-coated cobalt ferrite (CoFe2O4) composites with HTCC coating thicknesses between 0.62 and 4.38 nm were fabricated as novel, efficient, and magnetically recyclable photocatalysts via a facile, green approach. The CoFe2O4/HTCC composites showed high magnetization and low coercivity, which favored magnetic separation for reuse. The results show that the close coating of HTCC on CoFe2O4 nanoparticles enhanced electron transfer and charge separation, leading to a significant improvement in photocatalytic efficiency. The composites exhibited superior photocatalytic inactivation toward Escherichia coli K-12 under visible-light irradiation, with the complete inactivation of 7 log10 cfu·mL-1 of bacterial cells within 60 min. The destruction of bacterial cell membranes was monitored by field-effect scanning electron microscopy analysis and fluorescence microscopic images. The bacterial inactivation mechanism was investigated in a scavenger study, and •O2, H2O2, and h+ were identified as the major reactive species for bacterial inactivation. Multiple cycle runs revealed that these composites had excellent stability and reusability. In addition, the composites showed good photocatalytic bacterial inactivation performance in authentic water matrices such as surface water samples and secondarily treated sewage effluents. The results of this work indicate that CoFe2O4/HTCC composites have great potential in large-scale photocatalytic disinfection operations.
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Affiliation(s)
- Tianqi Wang
- School of Life Sciences , The Chinese University of Hong Kong , Shatin, NT, Hong Kong SAR , China
| | - Zhifeng Jiang
- School of Life Sciences , The Chinese University of Hong Kong , Shatin, NT, Hong Kong SAR , China
- Institute for Energy Research, School of Chemistry and Chemical Engineering , Jiangsu University , Zhenjiang , Jiangsu 212013 , China
| | - Taicheng An
- Guangzhou Key Laboratory of Environmental Catalysis and Pollution Control, Institute of Environmental Health and Pollution Control, School of Environmental Science and Engineering , Guangdong University of Technology , Guangzhou , Guangdong 510006 , China
| | - Guiying Li
- Guangzhou Key Laboratory of Environmental Catalysis and Pollution Control, Institute of Environmental Health and Pollution Control, School of Environmental Science and Engineering , Guangdong University of Technology , Guangzhou , Guangdong 510006 , China
| | - Huijun Zhao
- Centre for Clean Environment and Energy, Griffith Scholl of Environment , Griffith University , Southport , Queensland 4222 , Australia
| | - Po Keung Wong
- School of Life Sciences , The Chinese University of Hong Kong , Shatin, NT, Hong Kong SAR , China
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36
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Su T, Peng R, Hood ZD, Naguib M, Ivanov IN, Keum JK, Qin Z, Guo Z, Wu Z. One-Step Synthesis of Nb 2 O 5 /C/Nb 2 C (MXene) Composites and Their Use as Photocatalysts for Hydrogen Evolution. CHEMSUSCHEM 2018; 11:688-699. [PMID: 29281767 DOI: 10.1002/cssc.201702317] [Citation(s) in RCA: 127] [Impact Index Per Article: 21.2] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 12/06/2017] [Revised: 12/21/2017] [Indexed: 05/12/2023]
Abstract
Hydrogen production through facile photocatalytic water splitting is regarded as a promising strategy to solve global energy problems. Transition-metal carbides (MXenes) have recently drawn attention as potential co-catalyst candidates for photocatalysts. Here, we report niobium pentoxide/carbon/niobium carbide (MXene) hybrid materials (Nb2 O5 /C/Nb2 C) as photocatalysts for hydrogen evolution from water splitting. The Nb2 O5 /C/Nb2 C composites were synthesized by one-step CO2 oxidation of Nb2 CTx . Nb2 O5 grew homogeneously on Nb2 C after mild oxidation, during which some amorphous carbon was also formed. With an optimized oxidation time of 1.0 h, Nb2 O5 /C/Nb2 C showed the highest hydrogen generation rate (7.81 μmol h-1 gcat-1 ), a value that was four times higher than that of pure Nb2 O5 . The enhanced performance of Nb2 O5 /C/Nb2 C was attributed to intimate contact between Nb2 O5 and conductive Nb2 C and the separation of photogenerated charge carriers at the Nb2 O5 /Nb2 C interface; the results presented herein show that transition-metal carbide are promising co-catalysts for photocatalytic hydrogen production.
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Affiliation(s)
- Tongming Su
- School of Chemistry and Chemical Engineering, Guangxi University, Nanning, 530004, P.R. China
- Center for Nanophase Materials Sciences, Oak Ridge National Laboratory, Oak Ridge, Tennessee, 37831, USA
- Integrated Composites Laboratory (ICL), Department of Chemical & Biomolecular Engineering, University of Tennessee, Knoxville, Tennessee, 37996, USA
| | - Rui Peng
- Center for Nanophase Materials Sciences, Oak Ridge National Laboratory, Oak Ridge, Tennessee, 37831, USA
| | - Zachary D Hood
- Center for Nanophase Materials Sciences, Oak Ridge National Laboratory, Oak Ridge, Tennessee, 37831, USA
- School of Chemistry and Biochemistry, Georgia Institute of Technology, Atlanta, Georgia, 30332, USA
| | - Michael Naguib
- Materials Science Technology Division, Oak Ridge National Laboratory, Oak Ridge, Tennessee, 37831, USA
- Current address: Department of Physics and Engineering Physics, Tulane University, New Orleans, Louisiana, 70118, USA
| | - Ilia N Ivanov
- Center for Nanophase Materials Sciences, Oak Ridge National Laboratory, Oak Ridge, Tennessee, 37831, USA
| | - Jong Kahk Keum
- Center for Nanophase Materials Sciences, Oak Ridge National Laboratory, Oak Ridge, Tennessee, 37831, USA
| | - Zuzeng Qin
- School of Chemistry and Chemical Engineering, Guangxi University, Nanning, 530004, P.R. China
| | - Zhanhu Guo
- Integrated Composites Laboratory (ICL), Department of Chemical & Biomolecular Engineering, University of Tennessee, Knoxville, Tennessee, 37996, USA
| | - Zili Wu
- Center for Nanophase Materials Sciences, Oak Ridge National Laboratory, Oak Ridge, Tennessee, 37831, USA
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37
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Huang B, Pan C, Li X, Fan C, Li Y, Bai X, Zhang D, Zheng A, Sun Y. Microwave synthesis of titanium-containing carbon nanosheet over mesostructured cellular foam and the catalytic application. ADV POWDER TECHNOL 2018. [DOI: 10.1016/j.apt.2017.11.016] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/18/2022]
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38
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Kang S, Jang J, Pawar RC, Ahn SH, Lee CS. Low temperature fabrication of Fe2O3 nanorod film coated with ultra-thin g-C3N4 for a direct z-scheme exerting photocatalytic activities. RSC Adv 2018; 8:33600-33613. [PMID: 35548797 PMCID: PMC9086564 DOI: 10.1039/c8ra04499f] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/26/2018] [Accepted: 09/18/2018] [Indexed: 01/04/2023] Open
Abstract
We engineered high aspect ratio Fe2O3 nanorods (with an aspect ratio of 17 : 1) coated with g-C3N4 using a sequential solvothermal method at very low temperature followed by a thermal evaporation method. Here, the high aspect ratio Fe2O3 nanorods were directly grown onto the FTO substrate under relatively low pressure conditions. The g-C3N4 was coated onto a uniform Fe2O3 nanorod film as the heterostructure, exhibiting rational band conduction and a valence band that engaged in surface photoredox reactions by a direct z-scheme mechanism. The heterostructures, particularly 0.75g-C3N4@Fe2O3 nanorods, exhibited outstanding photocatalytic activities compared to those of bare Fe2O3 nanorods. In terms of 4-nitrophenol degradation, 0.75g-C3N4@Fe2O3 nanorods degraded all of the organic pollutant within 6 h under visible irradiation at a kinetic constant of 12.71 × 10−3 min−1, about 15-fold more rapidly than bare Fe2O3. Further, the hydrogen evolution rate was 37.06 μmol h−1 g−1, 39-fold higher than that of bare Fe2O3. We suggest that electron and hole pairs are efficiently separated in g-C3N4@Fe2O3 nanorods, thus accelerating surface photoreaction via a direct z-scheme under visible illumination. The engineered high aspect ratio of Fe2O3 nanorods coated with g-C3N4 demonstrates z-scheme mechanism, showing the best performance in 4-nitrophenol photodegradation and H2 evolution.![]()
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Affiliation(s)
- Suhee Kang
- Department of Materials and Chemical Engineering
- Hanyang University
- Ansan
- South Korea
| | - Joonyoung Jang
- Department of Materials and Chemical Engineering
- Hanyang University
- Ansan
- South Korea
| | | | - Sung-Hoon Ahn
- Department of Mechanical and Aerospace Engineering
- Seoul National University
- Seoul
- South Korea
| | - Caroline Sunyong Lee
- Department of Materials and Chemical Engineering
- Hanyang University
- Ansan
- South Korea
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39
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Li J, Bi X. Quantum confinement induced ultra-high intensity interfacial radiative recombination in nanolaminates. NANOSCALE 2017; 9:16420-16428. [PMID: 29058745 DOI: 10.1039/c7nr06564g] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/07/2023]
Abstract
Al2O3/ZnO, Al2O3/TiO2, TiO2/ZnO and MgO/ZnO nanolaminates (NLs) were prepared using atomic layer deposition to explore the dependence of luminescence characterization on the sublayer width and constituents. When the ZnO sublayer width is larger than the Bohr radius in Al2O3/ZnO NLs, the UV luminescence arising from ZnO is reduced and even quenched with decreasing the ZnO width due to the nonradiative recombination (NR) caused by the existence of interface states, while for the ZnO width smaller than the Bohr radius, a visible luminescence rather than UV emission is observed and further enhanced with decreasing the ZnO width. It is also found that the visible luminescence needs a certain width of Al2O3 and is extinguished by the replacement of Al2O3 with TiO2. A theoretical model based on the configuration coordination and quantum confinement effect is proposed to understand the physical origin underlying the intriguing optical behaviour. The mechanism has generality and is applicable for other NLs as well, such as Al2O3/TiO2 and MgO/ZnO NLs with ultra-thin sublayers in which similar luminescence enhancements are also observed. This work may provide a promising approach for realizing high performance luminescence with various wavelengths for electro- and photo-luminescence applications in NLs.
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Affiliation(s)
- Jin Li
- Key Laboratory of Aerospace Materials and Performance (Ministry of Education), School of Materials Science and Engineering, Beihang University (BUAA), Beijing, 100191, China.
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40
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Efficient Photocatalytic Activity of TiO2 Nanocrystals Modified with Organic Electron Donor and Barium Doping for Azo Group Decomposition Under UV Irradiation. Catal Letters 2017. [DOI: 10.1007/s10562-017-2201-7] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/18/2022]
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41
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Li X, Zheng S, Zhang C, Hu C, Chen F, Sun Y, Duo S, Zhang R, Hu Q, Li W, Kang Y. Synergistic promotion of photocatalytic performance by core@shell structured TiO2/Au@rGO ternary photocatalyst. MOLECULAR CATALYSIS 2017. [DOI: 10.1016/j.mcat.2017.05.016] [Citation(s) in RCA: 13] [Impact Index Per Article: 1.9] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
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Zhang J, Huang Y, Jin L, Rosei F, Vetrone F, Claverie JP. Efficient Upconverting Multiferroic Core@Shell Photocatalysts: Visible-to-Near-Infrared Photon Harvesting. ACS APPLIED MATERIALS & INTERFACES 2017; 9:8142-8150. [PMID: 28212485 DOI: 10.1021/acsami.7b00158] [Citation(s) in RCA: 33] [Impact Index Per Article: 4.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/19/2023]
Abstract
We report the two-step synthesis of a core@shell nanohybrid material for visible-to-near-infrared (NIR) photocatalysis. The core is constituted of NaGdF4:Er3+, Yb3+ upconverting nanoparticles (UCNPs). A bismuth ferrite (BFO) shell is assembled around the UCNPs via a hydrothermal process. The photocatalytic degradation assays of methylene orange and 4-chlorophenol reveal that these core@shell nanostructures possess remarkably enhanced reaction activity under visible and NIR irradiation, compared to the BFO powder alone and the BFO-UCNP mixture. Photo-charge scavenger tests and fluorescent assays indicate that hydroxyl radicals play a pivotal role in the photodegradation mechanism. The enhanced photoactivity of the core@shell structure is attributed to the NIR radiation which is converted into visible light by UCNPs, and which is then captured by BFO via a nonradiative luminescence resonance energy transfer process. Therefore, this core@shell architecture optimizes solar energy use by efficiently harvesting visible and NIR photons.
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Affiliation(s)
- Jianming Zhang
- School of Chemistry and Chemical Engineering, Jiangsu University , Zhenjiang 212013, China
| | - Yue Huang
- Centre Énergie, Matériaux et Télécommunications, Institut National de la Recherche Scientifique , 1650 Boul. Lionel Boulet, Varennes, Québec J3X 1S2, Canada
| | - Lei Jin
- Centre Énergie, Matériaux et Télécommunications, Institut National de la Recherche Scientifique , 1650 Boul. Lionel Boulet, Varennes, Québec J3X 1S2, Canada
| | - Federico Rosei
- Centre Énergie, Matériaux et Télécommunications, Institut National de la Recherche Scientifique , 1650 Boul. Lionel Boulet, Varennes, Québec J3X 1S2, Canada
- Institute for Fundamental and Frontier Science, University of Electronic Science and Technology of China , Chengdu, China
| | - Fiorenzo Vetrone
- Centre Énergie, Matériaux et Télécommunications, Institut National de la Recherche Scientifique , 1650 Boul. Lionel Boulet, Varennes, Québec J3X 1S2, Canada
- Institute for Fundamental and Frontier Science, University of Electronic Science and Technology of China , Chengdu, China
| | - Jerome P Claverie
- Department of Chemistry, Université de Sherbrooke , Sherbrooke, Quebec J1K 2R1, Canada
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43
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CNTs-Modified Nb 3O 7F Hybrid Nanocrystal towards Faster Carrier Migration, Lower Bandgap and Higher Photocatalytic Activity. Sci Rep 2017; 7:39973. [PMID: 28059123 PMCID: PMC5216398 DOI: 10.1038/srep39973] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/16/2016] [Accepted: 11/30/2016] [Indexed: 11/09/2022] Open
Abstract
Novel semiconductor photocatalysts have been the research focus and received much attention in recent years. The key issues for novel semiconductor photocatalysts are to effectively harvest solar energy and enhance the separation efficiency of the electron-hole pairs. In this work, novel Nb3O7F/CNTs hybrid nanocomposites with enhanced photocatalytic activity have been successfully synthesized by a facile hydrothermal plus etching technique. The important finding is that appropriate pH values lead to the formation of Nb3O7F nanocrystal directly. A general strategy to introdue interaction between Nb3O7F and CNTs markedly enhances the photocatalytic activity of Nb3O7F. Comparatively, Nb3O7F/CNTs nanocomposites exhibit higher photodegradation efficiency and faster photodegradation rate in the solution of methylene blue (MB) under visible-light irradiation. The higher photocatalytic activity may be attributed to more exposed active sites, higher carrier migration and narrower bandgap because of good synergistic effect. The results here may inspire more engineering, new design and facile fabrication of novel photocatalysts with highly photocatalytic activity.
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44
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Peng H, Yang X, Zhang P, Zhang Y, Liu C, Liu D, Gui J. Diethylenetriamine-assisted in situ synthesis of TiO2 nanoparticles on carbon nanotubes with well-defined structure and enhanced photocatalytic performance. RSC Adv 2017. [DOI: 10.1039/c7ra09324a] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022] Open
Abstract
In solvothermal conditions, DETA will work as a connecting bridge to in situ form TiO2/CNT composites with a well-defined structure and enhanced photocatalytic performance.
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Affiliation(s)
- Hailong Peng
- State Key Laboratory of Separation Membranes and Membrane Processes
- College of Environment and Chemical Engineering
- Tianjin Polytechnic University
- Tianjin 300387
- China
| | - Xiaoyan Yang
- School of Chemistry and Chemical Engineering
- Shangqiu Normal University
- Shangqiu 476000
- China
| | - Peng Zhang
- School of Material Science and Engineering
- Tianjin Polytechnic University
- Tianjin 300387
- China
| | - Yiming Zhang
- State Key Laboratory of Separation Membranes and Membrane Processes
- College of Environment and Chemical Engineering
- Tianjin Polytechnic University
- Tianjin 300387
- China
| | - Chengwei Liu
- State Key Laboratory of Separation Membranes and Membrane Processes
- College of Environment and Chemical Engineering
- Tianjin Polytechnic University
- Tianjin 300387
- China
| | - Dan Liu
- State Key Laboratory of Separation Membranes and Membrane Processes
- College of Environment and Chemical Engineering
- Tianjin Polytechnic University
- Tianjin 300387
- China
| | - Jianzhou Gui
- State Key Laboratory of Separation Membranes and Membrane Processes
- College of Environment and Chemical Engineering
- Tianjin Polytechnic University
- Tianjin 300387
- China
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45
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La3+ doped BiOBr microsphere with enhanced visible light photocatalytic activity. Colloids Surf A Physicochem Eng Asp 2017. [DOI: 10.1016/j.colsurfa.2016.10.012] [Citation(s) in RCA: 50] [Impact Index Per Article: 7.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/24/2022]
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Wang Z, Li J, Tang F, Lin J, Jin Z. Polydopamine nanotubes-templated synthesis of TiO2 and its photocatalytic performance under visible light. RSC Adv 2017. [DOI: 10.1039/c7ra03063k] [Citation(s) in RCA: 19] [Impact Index Per Article: 2.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/23/2023] Open
Abstract
As templates for generation of TiO2 photocatalysts, polydopamine nanotubes can provide codopants (carbon and nitrogen) and graphene-like carbon coverings simultaneously.
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Affiliation(s)
- Zehuan Wang
- Department of Chemistry
- Renmin University of China
- Beijing 100872
- People's Republic of China
| | - Jia Li
- Department of Chemistry
- Renmin University of China
- Beijing 100872
- People's Republic of China
| | - Feng Tang
- Department of Chemistry
- Renmin University of China
- Beijing 100872
- People's Republic of China
| | - Jun Lin
- Department of Chemistry
- Renmin University of China
- Beijing 100872
- People's Republic of China
| | - Zhaoxia Jin
- Department of Chemistry
- Renmin University of China
- Beijing 100872
- People's Republic of China
| |
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