Novel hydrostable Z-scheme Ag/CsPbBr3/Bi2WO6 photocatalyst for effective degradation of Rhodamine B in aqueous solution |
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Authors: | Jia-Rong Xue Rong-Chao Xue Pei-Yao Chen Yong Wang Li-Ping Yu |
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Institution: | 1. Department of Chemistry, School of Science, Tianjin University, Tianjin, China;2. Tianjin Fire Research Institute of MEM, Tianjin, China |
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Abstract: | In this study, a hydrostable Z-scheme Ag/CsPbBr3/Bi2WO6 photocatalyst was designed and fabricated for the degradation of Rhodamine B (RhB). The structural instability of CsPbX3 perovskites in water is one of the main obstacles that restrict their practical application in photocatalytic wastewater treatment. The photocatalyst was prepared in three steps: passivation of CsPbBr3 nanocrystals (NCs) with 3-mercaptopropionic acid (MPA), construction of a heterojunction between MPA-passivated CsPbBr3 NCs and Bi2WO6 ultrathin nanosheets, and doping Ag nanoparticles as charge mediators in the heterojunction. The as-obtained 5%Ag/20%CsPbBr3/Bi2WO6 exhibits good stability and excellent photocatalytic activity. The degradation rate is 93.9% in 120 min, which is 4.41 times than that of Bi2WO6. |
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Keywords: | Bi2WO6 CsPbBr3 photocatalyst photodegradation Rhodamine B |
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