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Chen X, Chen J, Li N, Li J, He J, Xu S, Zhu Y, Yao L, Lai Y, Zhu R. Ag 3PO 4-anchored La 2Ti 2O 7 nanorod as a Z-Scheme heterostructure composite with boosted photogenerated carrier separation and enhanced photocatalytic performance under natural sunlight. ENVIRONMENTAL POLLUTION (BARKING, ESSEX : 1987) 2023; 323:121322. [PMID: 36813103 DOI: 10.1016/j.envpol.2023.121322] [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: 12/05/2022] [Revised: 02/13/2023] [Accepted: 02/18/2023] [Indexed: 06/18/2023]
Abstract
Developing wide spectra-responsive photocatalysts has attracted considerable attention in the photocatalytic technology to achieve excellent catalytic activity. Ag3PO4, with strong response to light spectra shorter than 530 nm, shows extremely outstanding photocatalytic oxidation ability. Unfortunately, the photocorrosion of Ag3PO4 is still the biggest obstacle to its application. Herein, the La2Ti2O7 nanorod was used to anchor Ag3PO4 nanoparticles in this study, and a novel Z-Scheme La2Ti2O7/Ag3PO4 heterostructure composite was constructed. Remarkably, the composite showed strong responsive to most of the spectra in natural sunlight. The Ag0 formed in-situ acted as the recombination center of photogenerated carriers, which promoted their efficient separation and contributed to the improved photocatalytic performance of the heterostructure. When the mass ratio of Ag3PO4 in the La2Ti2O7/Ag3PO4 catalyst was 50%, the degradation rate constant of Rhodamine B (RhB), methyl orange (MO), chloroquine phosphate (CQ), tetracycline (TC), and phenol under natural sunlight irradiation were 0.5923, 0.4463, 0.1399, 0.0493, and 0.0096 min-1, respectively. Furthermore, the photocorrosion of the composite was greatly inhibited, 76.49% of CQ and 83.96% of RhB were still degraded after four cycles. Besides, the holes and O2•- played a significant role in RhB degradation, and it included multiple mechanisms of deethylation, deamination, decarboxylation, and cleavage of ring-structures. Moreover, the treated solution can also show safety to the water receiving environment. Overall, the synthesized Z-Scheme La2Ti2O7/Ag3PO4 composite exhibited immense potential for removing various organic pollutants through photocatalytic technology under natural sunlight irradiation.
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Affiliation(s)
| | | | - Ning Li
- Foshan University, Foshan 528225, China; Guangzhou Institute of Energy Conversion, Chinese Academy of Sciences, Guangzhou 510610, China
| | - Jiesen Li
- Foshan University, Foshan 528225, China; Department of Research and Development, Guangzhou Ginpie Technology Co., Ltd., Guangzhou 510670, China
| | - Juhua He
- Foshan University, Foshan 528225, China; Department of Civil and Environmental Engineering, The Hong Kong University of Science and Technology, Hong Kong 999077, China
| | - Song Xu
- Foshan University, Foshan 528225, China
| | - Yanping Zhu
- College of Natural Resources and Environment, South China Agricultural University, Guangzhou 510642, China
| | - Liang Yao
- Foshan University, Foshan 528225, China
| | - Yiqi Lai
- Foshan University, Foshan 528225, China
| | - Runliang Zhu
- Guangzhou Institute of Geochemistry, Chinese Academy of Sciences, Guangzhou 510640, China.
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Maheskumar V, Lin YM, Jiang Z, Vidhya B, Ghosal A. New insights into the structural, optical, electronic and photocatalytic properties of sulfur doped bulk BiVO4 and surface BiVO4 on {0 1 0} and {1 1 0} via a collective theoretical and experimental investigation. J Photochem Photobiol A Chem 2022. [DOI: 10.1016/j.jphotochem.2021.113757] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/25/2022]
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Xu L, Meng J, Wang J, Wang L, Li Q. Hybrid density functional study on band structure engineering of ZnS(110) surface by anion–cation codoping for overall water splitting. NEW J CHEM 2022. [DOI: 10.1039/d2nj00905f] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
The (Ru + C)-codoped ZnS(110) surface is predicted to be a potential candidate for solar-driven water splitting.
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Affiliation(s)
- Lili Xu
- Hefei National Laboratory for Physical Sciences at the Microscale & Synergetic Innovation Center of Quantum Information and Quantum Physics, University of Science and Technology of China, Hefei, Anhui 230026, China
| | - Jie Meng
- Hefei National Laboratory for Physical Sciences at the Microscale & Synergetic Innovation Center of Quantum Information and Quantum Physics, University of Science and Technology of China, Hefei, Anhui 230026, China
| | - Jiajun Wang
- Tianjin Key Laboratory of Structure and Performance for Functional Molecules, College of Chemistry, Tianjin Normal University, Tianjin 300387, China
| | - Lu Wang
- Tianjin Key Laboratory of Structure and Performance for Functional Molecules, College of Chemistry, Tianjin Normal University, Tianjin 300387, China
| | - Qunxiang Li
- Hefei National Laboratory for Physical Sciences at the Microscale & Synergetic Innovation Center of Quantum Information and Quantum Physics, University of Science and Technology of China, Hefei, Anhui 230026, China
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Mai H, Chen D, Tachibana Y, Suzuki H, Abe R, Caruso RA. Developing sustainable, high-performance perovskites in photocatalysis: design strategies and applications. Chem Soc Rev 2021; 50:13692-13729. [PMID: 34842873 DOI: 10.1039/d1cs00684c] [Citation(s) in RCA: 36] [Impact Index Per Article: 12.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/15/2022]
Abstract
Solar energy is attractive because it is free, renewable, abundant and sustainable. Photocatalysis is one of the feasible routes to utilize solar energy for the degradation of pollutants and the production of fuel. Perovskites and their derivatives have received substantial attention in both photocatalytic wastewater treatment and energy production because of their highly tailorable structural and physicochemical properties. This review illustrates the basic principles of photocatalytic reactions and the application of these principles to the design of robust and sustainable perovskite photocatalysts. It details the structures of the perovskites and the physics and chemistry behind photocatalytic reactions and describes the advantages and limitations of popular strategies for the design of photoactive perovskites. This is followed by examples of how these strategies are applied to enhance the photocatalytic efficiency of oxide, halide and oxyhalide perovskites, with a focus on materials with potential for practical application, that is, not containing scarce or toxic elements. It is expected that this overview of the development of photocatalysts and deeper understanding of photocatalytic principles will accelerate the exploitation of efficient perovskite photocatalysts and bring about effective solutions to the energy and environmental crisis.
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Affiliation(s)
- Haoxin Mai
- Applied Chemistry and Environmental Science, School of Science, STEM College, RMIT University, GPO Box 2476, Melbourne, Victoria 3001, Australia.
| | - Dehong Chen
- Applied Chemistry and Environmental Science, School of Science, STEM College, RMIT University, GPO Box 2476, Melbourne, Victoria 3001, Australia.
| | - Yasuhiro Tachibana
- School of Engineering, STEM College, RMIT University, Bundoora, Victoria 3083, Australia
| | - Hajime Suzuki
- Department of Energy and Hydrocarbon Chemistry, Graduate School of Engineering, Kyoto University, Katsura, Nishikyo-ku, Kyoto 615-8510, Japan
| | - Ryu Abe
- Department of Energy and Hydrocarbon Chemistry, Graduate School of Engineering, Kyoto University, Katsura, Nishikyo-ku, Kyoto 615-8510, Japan
| | - Rachel A Caruso
- Applied Chemistry and Environmental Science, School of Science, STEM College, RMIT University, GPO Box 2476, Melbourne, Victoria 3001, Australia.
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Liang Q, Liu X, Wang J, Liu Y, Liu Z, Tang L, Shao B, Zhang W, Gong S, Cheng M, He Q, Feng C. In-situ self-assembly construction of hollow tubular g-C 3N 4 isotype heterojunction for enhanced visible-light photocatalysis: Experiments and theories. JOURNAL OF HAZARDOUS MATERIALS 2021; 401:123355. [PMID: 32659580 DOI: 10.1016/j.jhazmat.2020.123355] [Citation(s) in RCA: 67] [Impact Index Per Article: 22.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 04/27/2020] [Revised: 06/09/2020] [Accepted: 06/25/2020] [Indexed: 05/15/2023]
Abstract
A highly reactive hollow tubular g-C3N4 isotype heterojunction (SCN-CN) was designed to enhance visible light absorption and manipulate the directed transfer of electrons and holes. The results of UV-vis DRS, XPS valence band and DFT theoretical calculations indicated S doping increases the visible-light absorption capacity and changed the ba nd gap structure of g-C3N4 (CN), resulting in the transfer of electrons from the CN to the SCN and holes from the SCN to the CN under visible light. In addition, the tubular structure of the SCN-CN facilitated the transfer of electrons in the longitudinal direction, which reduced charge carrier recombination. Furthermore, the optical properties, electronic structure, and electron transfer of SCN-CN were also studied by experiments and theoretical calculations. The antibiotic tetracycline hydrochloride (TCH) and dye Rhodamine B (RHB) were subjected to evaluate the photocatalytic performance of SCN-CN. The scavenger tests and ESR data showed that the h+, ·O2- and ·OH worked together in the photocatalytic process. Moreover, the photocatalytic degradation pathway was analyzed by LC-MS. This study synthesized a hollow tubular CN isotype heterojunction with high visible-light photocatalytic performance and provided a theoretical basis for CN isotype heterojunction.
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Affiliation(s)
- Qinghua Liang
- College of Environmental Science and Engineering, Hunan University and Key Laboratory of Environmental Biology and Pollution Control (Hunan University), Ministry of Education, Changsha, 410082, PR China
| | - Xiaojuan Liu
- The First Affiliated Hospital of Hunan University of Chinese Medicine, Changsha, 410007, PR China
| | - Jiajia Wang
- College of Environmental Science and Engineering, Hunan University and Key Laboratory of Environmental Biology and Pollution Control (Hunan University), Ministry of Education, Changsha, 410082, PR China
| | - Yang Liu
- College of Environmental Science and Engineering, Hunan University and Key Laboratory of Environmental Biology and Pollution Control (Hunan University), Ministry of Education, Changsha, 410082, PR China
| | - Zhifeng Liu
- College of Environmental Science and Engineering, Hunan University and Key Laboratory of Environmental Biology and Pollution Control (Hunan University), Ministry of Education, Changsha, 410082, PR China.
| | - Lin Tang
- College of Environmental Science and Engineering, Hunan University and Key Laboratory of Environmental Biology and Pollution Control (Hunan University), Ministry of Education, Changsha, 410082, PR China.
| | - Binbin Shao
- College of Environmental Science and Engineering, Hunan University and Key Laboratory of Environmental Biology and Pollution Control (Hunan University), Ministry of Education, Changsha, 410082, PR China
| | - Wei Zhang
- The First Affiliated Hospital of Hunan University of Chinese Medicine, Changsha, 410007, PR China
| | - Shanxi Gong
- School of Chemistry and Chemical Engineering, Guangxi University, Nanning 530004, PR China
| | - Min Cheng
- College of Environmental Science and Engineering, Hunan University and Key Laboratory of Environmental Biology and Pollution Control (Hunan University), Ministry of Education, Changsha, 410082, PR China
| | - Qingyun He
- College of Environmental Science and Engineering, Hunan University and Key Laboratory of Environmental Biology and Pollution Control (Hunan University), Ministry of Education, Changsha, 410082, PR China
| | - Chengyang Feng
- College of Environmental Science and Engineering, Hunan University and Key Laboratory of Environmental Biology and Pollution Control (Hunan University), Ministry of Education, Changsha, 410082, PR China
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Bakardjieva S, Mares J, Fajgar R, Zenou VY, Maleckova M, Chatzisymeon E, Bibova H, Jirkovsky J. The relationship between microstructure and photocatalytic behavior in lanthanum-modified 2D TiO 2 nanosheets upon annealing of a freeze-cast precursor. RSC Adv 2019; 9:22988-23003. [PMID: 35514506 PMCID: PMC9067125 DOI: 10.1039/c9ra03940f] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/24/2019] [Accepted: 07/13/2019] [Indexed: 11/21/2022] Open
Abstract
Titanium dioxide modified with 3 wt% La was prepared via a green freeze-casting method, and its photocatalytic activity was tested in terms of its ability to degrade 4-chlorophenol (4-CP) and remove total organic carbon (TOC). Under annealing conditions, the freeze-cast precursor was transformed into an La-modified anatase with a well-defined 2D TiO2 nanosheet morphology. Rietveld refinement of the X-ray diffraction patterns confirmed the substitutional nature of the La cation that induced local structural variations and involved subtle ion displacement in the TiO2 lattice due to the ionic size effect. Despite nearly identical tetragonal structures, replacement of Ti with La alters the photocatalytic activity through a reduction in band gap energies and an increase in charge carrier mobility. Material annealed at 650 °C exhibited the highest photocatalytic performance and achieved efficient TOC removal. Upon annealing at 800 °C, nanoscale lanthanum-enriched regions were generated due to the diffusive migration of La cations and phase transition from anatase to rutile. The La3+ cation, acting as a structural promoter, supported 2D TiO2 growth with well controlled crystallite size, surface area and porosity. La3+ could be regarded as a potential electronic promoter that can reduce the band gap of 2D TiO2 nanosheets and can provide a signature of the electron transfer and carrier charge separation. Both methods, kinetics of degradation of 4-CP and TOC, provided similar results, revealing that the photocatalytic activity under UV light irradiation increased in the order 950C < 500 °C < 800 °C < 650 °C < TiO2-P25.
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Affiliation(s)
- Snejana Bakardjieva
- Institute of Inorganic Chemistry of the Czech Academy of Sciences 250 68 Husinec-Řež Czech Republic
| | - Jakub Mares
- Institute of Inorganic Chemistry of the Czech Academy of Sciences 250 68 Husinec-Řež Czech Republic
| | - Radek Fajgar
- Institute of Chemical Process and Fundamentals of the Czech Academy of Sciences Rozvojova 2/135 165 02 Prague Czech Republic
| | - Victor Y Zenou
- Nuclear Research Center-Negev, Department of Material Engineering 841 90 Beer Sheva Israel
| | - Michaela Maleckova
- Charles University, Faculty of Science Hlavova 2030/8 128 42 Prague Czech Republic
| | - Efthalia Chatzisymeon
- School of Engineering, Institute for Infrastructure and Environment, The University of Edinburgh Edinburgh EH9 3JL UK
| | - Hana Bibova
- J. Heyrovsky Institute of Physical Chemistry of the Czech Academy of Sciences Dolejskova 2155/3 182 23 Prague Czech Republic
| | - Jaromir Jirkovsky
- J. Heyrovsky Institute of Physical Chemistry of the Czech Academy of Sciences Dolejskova 2155/3 182 23 Prague Czech Republic
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