期刊
CHEMICAL ENGINEERING JOURNAL
卷 398, 期 -, 页码 -出版社
ELSEVIER SCIENCE SA
DOI: 10.1016/j.cej.2020.125523
关键词
AgVO3; ZnIn2S4; Ag; Z-scheme heterojunction; Photocatalysis
资金
- National Natural Science Foundation of China [21805115, 21576112, 21606114]
- NSFC-Shanxi Coal Based Low Carbon Joint Fund [U1810117]
- Postdoctoral Science Foundation of China
- Jiangsu Planned Projects for postdoctoral Research Funds [1701025A]
- Scientific Research Foundation for Senior Talent of Jiangsu University [17JDG020]
At present, photocorrosion is one of the factors that seriously restrict the improvement of photocatalytic performance. Herein, we successfully constructed AgVO3/ZnIn2S4 composite photocatalysts with the property of One Stone and Two Birds, which solved two urgent problems simultaneously, the S-metal bonds of sulfide are easily oxidized by photogenerated holes and the Ag+ of Ag-based photocatalysts are easily reduced by photogenerated electrons. Additionally, the Ag NPs were precipitated automatically during the synthesis of AgVO3/ZnIn2S4, which favor to enhance the transfer rate of the photogenerated carriers and remain strong redox ability of the AgVO3/ZnIn2S4 photocatalysts. The as-prepared 20% AgVO3/ZnIn2S4 exhibited the top-flight photocatalytic reduction of Cr (VI) activity. In addition, the effects of pH value and temperature on the photocatalytic reduction of Cr (VI) were investigated in depth. Simultaneously, the photocatalytic reduction activity was further verified based on biotoxicity assessments and toxicity predictions of the products. At the same time, the photocatalyst showed good photocatalytic degradation activity to 2-mercaptobenzothiazole (MBT) and ciprofloxacin (CIP). In addition, the AgVO3/ZnIn2S4 photocatalysts possessed superior cycle performance and structural stability. The enhanced activity and stability were ascribed to the successfully suppressed the photocorrosion of both AgVO3 and ZnIn2S4 by transferring the photogenerated electrons and holes to Ag NPs.
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