Highly efficient Z-scheme photocatalysts of Ag/AgIn5S8 decoration on surfaces with high exposure (040) BiVO4 for enhanced photocatalytic performance. (December 2022)

• Record Type: Journal Article
• Authors: Zhou, Yi; Chen, Zhiyue; Li, Jiaxin; Xiang, Minghui; Zhou, Yinghong; Niu, Jiangtao; Zhang, Jin
• Is Part Of: Journal of physics and chemistry of solids. Volume 171(2022)
• Publication Date: 2022-12
• Subjects: Z-scheme -- Ag/AgIn5S8/BiVO4 -- SPR effect -- Visible light; Solids -- Periodicals; Solides -- Périodiques; Solids; Periodicals; 530.41
• DOI: 10.1016/j.jpcs.2022.111038
• Languages: English
• ISSNs: 0022-3697

Abstract

Abstract: Design and construction of a heterojunction structured photocatalyst with efficient electron transfer is of great significance. In this work, we prepared a unique Z-scheme Ag/Agln5 S8 /BiVO4 photocatalyst of which BiVO4 has highly exposed (040) crystal facets. Ag as an electronic medium to build a special and efficient electron transfer path. In addition, the surface plasmon resonance effect of Ag improves the sunlight utilization of photocatalyst, and Ag as an electron transport medium and co-catalyst enhances the photocatalytic ability of the photocatalyst. Under optimum reaction conditions, the loading of AgIn5 S8 is 30%, the reaction rate constants of tetracycline degradation over Ag/BA-30% were 1.96 and 5.58 times of pure BiVO4 and AgIn5 S8 . The possible Z-scheme electron-hole pair transfer mechanism was presented through the capture experiment. It is suggested that ·O2 −, h + and ·OH are engaged in the degradation of TC. And the prepared photocatalysts were proved to have a potential application value after four consecutive cycles. Highlights: The Ag/Agln5 S8 /BiVO4 (040) Z-scheme heterojunction photocatalyst has been first prepared. Highly exposed (040) facet of BiVO4 promotes photogenerated carrier separation efficiency. Ag/Agln5 S8 /BiVO4 (040) has better electron transfer path and light absorption ability. Ag nanoparticles as electron mediator and co-catalyst enhances the photocatalytic performance of the photocatalyst. The enhanced mechanism of photocatalytic degradation of TC was discussed.