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Guan C, Hou T, Nie W, Zhang Q, Duan L, Zhao X. Facet synergy dominant Z-scheme transition in BiOCl with enhanced 1O 2 generation. CHEMOSPHERE 2022; 307:135663. [PMID: 35835240 DOI: 10.1016/j.chemosphere.2022.135663] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 04/30/2022] [Revised: 07/01/2022] [Accepted: 07/08/2022] [Indexed: 06/15/2023]
Abstract
BiOCl powders with different morphology were obtained through self-assembling. Their photocatalytic performance was tested through degradation of organic dye and mechanism of photocatalytic for obtained samples were investigated. Relevant characterization demonstrated that facet synergy was a main reason of photocatalytic performance promotion due to changed facet exposure and proportion under self-assembling. Theory and experimental analysis manifested that synergistic facet stimulated Z scheme transition in samples with lower (001) facet proportion, which provided favorable condition of 1O2 generation and simultaneously generated prominent charge separation. This work unveiled the facet synergy dominant photocatalytic performance improvement in self-assembling system of BiOCl and verified decisive role of facet proportion in constructing Z-scheme facet junction, which also prompted possibility of improving 1O2 generation through facet engineering under self-assembling.
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Affiliation(s)
- Chongshang Guan
- MOE Key Laboratory of Material Physics and Chemistry Under Extraordinary Conditions, Shaanxi Key Laboratory of Condensed Matter Structures and Properties, Department of Applied Physics, School of Physical Science and Technology, Northwestern Polytechnical University, Xi'an, 710072, People's Republic of China
| | - Tian Hou
- MOE Key Laboratory of Material Physics and Chemistry Under Extraordinary Conditions, Shaanxi Key Laboratory of Condensed Matter Structures and Properties, Department of Applied Physics, School of Physical Science and Technology, Northwestern Polytechnical University, Xi'an, 710072, People's Republic of China
| | - Wuyang Nie
- MOE Key Laboratory of Material Physics and Chemistry Under Extraordinary Conditions, Shaanxi Key Laboratory of Condensed Matter Structures and Properties, Department of Applied Physics, School of Physical Science and Technology, Northwestern Polytechnical University, Xi'an, 710072, People's Republic of China
| | - Qian Zhang
- MOE Key Laboratory of Material Physics and Chemistry Under Extraordinary Conditions, Shaanxi Key Laboratory of Condensed Matter Structures and Properties, Department of Applied Physics, School of Physical Science and Technology, Northwestern Polytechnical University, Xi'an, 710072, People's Republic of China
| | - Libing Duan
- MOE Key Laboratory of Material Physics and Chemistry Under Extraordinary Conditions, Shaanxi Key Laboratory of Condensed Matter Structures and Properties, Department of Applied Physics, School of Physical Science and Technology, Northwestern Polytechnical University, Xi'an, 710072, People's Republic of China
| | - Xiaoru Zhao
- MOE Key Laboratory of Material Physics and Chemistry Under Extraordinary Conditions, Shaanxi Key Laboratory of Condensed Matter Structures and Properties, Department of Applied Physics, School of Physical Science and Technology, Northwestern Polytechnical University, Xi'an, 710072, People's Republic of China.
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Yuan G, Li F, Li K, Liu J, Li J, Zhang S, Jia Q, Zhang H. Research Progress on Photocatalytic Reduction of Cr(VI) in Polluted Water. BULLETIN OF THE CHEMICAL SOCIETY OF JAPAN 2021. [DOI: 10.1246/bcsj.20200317] [Citation(s) in RCA: 18] [Impact Index Per Article: 6.0] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/12/2022]
Affiliation(s)
- Gaoqian Yuan
- The State Key Laboratory of Refractories and Metallurgy, Wuhan University of Science and Technology, Wuhan 430081, P. R. China
| | - Faliang Li
- The State Key Laboratory of Refractories and Metallurgy, Wuhan University of Science and Technology, Wuhan 430081, P. R. China
- Jiangxi Engineering Research Center of Industrial Ceramics, Pingxiang 337022, P. R. China
| | - Kezhuo Li
- The State Key Laboratory of Refractories and Metallurgy, Wuhan University of Science and Technology, Wuhan 430081, P. R. China
| | - Jie Liu
- The State Key Laboratory of Refractories and Metallurgy, Wuhan University of Science and Technology, Wuhan 430081, P. R. China
| | - Junyi Li
- The State Key Laboratory of Refractories and Metallurgy, Wuhan University of Science and Technology, Wuhan 430081, P. R. China
| | - Shaowei Zhang
- College of Engineering, Mathematics and Physical Sciences, University of Exeter, Exeter EX4 4QF, UK
| | - Quanli Jia
- Henan Key Laboratory of High Temperature Functional Ceramics, Zhengzhou University, 75 Daxue Road, Zhengzhou 450052, P. R. China
| | - Haijun Zhang
- The State Key Laboratory of Refractories and Metallurgy, Wuhan University of Science and Technology, Wuhan 430081, P. R. China
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Sun J, Hood ZD, Wu S, Wan P, Sun L, Yang S, Chisholm MF. Reversibly tuning the surface state of Ag via the assistance of photocatalysis in Ag/BiOCl. NANOTECHNOLOGY 2019; 30:305601. [PMID: 30986768 DOI: 10.1088/1361-6528/ab192e] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/09/2023]
Abstract
Silver (Ag) nanoparticles can be spontaneously oxidized and present in different oxidized surface phases. The impact of oxidation induced photo absorption property and related photocatalytic activity are still unclear in Ag-decorated semiconductor photocatalysts. Herein, Ag-decorated BiOCl with the metallic Ag0 to oxidized Ag+ were employed to investigate the effect of surface state of Ag on relative photocatalyst properties. A redshift of localized surface plasmon resonance was observed as the Ag0 oxidized to Ag+ and a reversible manipulation was realized in UV light-driven photocatalysis. It is found that the Ag0/BiOCl presents higher photocatalytic activity than Ag+/BiOCl, but this difference is gradually decreasing under UV light irradiation compared with visible light irradiation. A controlled experiment suggests that the reduction of Ag+ under UV light reduced the difference between Ag0/BiOCl and Ag+/BiOCl. The possible mechanism for electron transport and the conversion between Ag+ and Ag0 via the assistance of the photoelectric effect from BiOCl has been elucidated. This photocatalytic reaction assisted reversible tuning the surface state of Ag/BiOCl will open up the possibility of rationally designing Ag-decorated semiconductors for light harvesting.
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Affiliation(s)
- Jianguo Sun
- Electron Microscopy Center of Chongqing University, College of Materials Science and Engineering, Chongqing University, Chongqing, 400044, People's Republic of China
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Wu S, Sun J, Yang SZ, He Q, Zhang L, Sun L. Evolution of Oxyhalide Crystals under Electron Beam Irradiation: An in Situ Method To Understand the Origin of Structural Instability. Inorg Chem 2018; 57:8988-8993. [PMID: 29989391 DOI: 10.1021/acs.inorgchem.8b00953] [Citation(s) in RCA: 13] [Impact Index Per Article: 2.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/01/2023]
Abstract
The oxyhalides have attracted growing interest because of their excellent photocatalytic performance. However, their structural instability hampers further development toward practical applications, a major challenge of current concerns. It is appealing to figure out the origin of structural instability and guide the design of advanced oxyhalide crystals for efficient photocatalysis. In this study, the decomposition of BiOCl crystals, a typical oxyhalide, is triggered by electron beam irradiation and investigated in situ by transmission electron microscopy. The results indicate that the instability originates from the unique layered structure of BiOCl crystals; the interlayer van der Waals bonds are easily broken under electron beam irradiation via the assistance of hydroxyl groups. This facilitates the formation of O/Cl-deficient BiO1- xCl1- y species, Bi metal nanoparticles, and nanobubbles (gaseous substance) that are confined between the adjacent layers. Surface reconstruction would be an effective way to stabilize the oxyhalide crystals.
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Affiliation(s)
- Sujuan Wu
- College of Materials Science and Engineering , Chongqing University , Chongqing 400044 , People's Republic of China.,Electron Microscopy Center of Chongqing University , Chongqing University , Chongqing 400044 , People's Republic of China.,Materials Science and Technology Division , Oak Ridge National Laboratory , Oak Ridge , Tennessee 37831 , United States
| | - Jianguo Sun
- College of Materials Science and Engineering , Chongqing University , Chongqing 400044 , People's Republic of China.,Electron Microscopy Center of Chongqing University , Chongqing University , Chongqing 400044 , People's Republic of China
| | - Shi-Ze Yang
- Materials Science and Technology Division , Oak Ridge National Laboratory , Oak Ridge , Tennessee 37831 , United States
| | - Qiongyao He
- College of Materials Science and Engineering , Chongqing University , Chongqing 400044 , People's Republic of China.,Electron Microscopy Center of Chongqing University , Chongqing University , Chongqing 400044 , People's Republic of China
| | - Ling Zhang
- College of Materials Science and Engineering , Chongqing University , Chongqing 400044 , People's Republic of China.,Electron Microscopy Center of Chongqing University , Chongqing University , Chongqing 400044 , People's Republic of China
| | - Lidong Sun
- College of Materials Science and Engineering , Chongqing University , Chongqing 400044 , People's Republic of China.,Key Laboratory of Advanced Energy Materials Chemistry (Ministry of Education) , Nankai University , Tianjin 300071 , People's Republic of China
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