Ag2S nanoparticles decorated BiVO4 composites: 3-mercaptopropionic acid assisted synthesis and enhanced visible-light-driven photocatalytic performance

被引:7
作者
Cao, Ling [1 ]
Xu, Kangli [1 ]
Wang, Rong [1 ]
机构
[1] Taiyuan Univ Technol, Coll Phys & Optoelect, Taiyuan 030024, Shanxi, Peoples R China
关键词
Composites; Nanostructures; Semiconductors; Catalytic properties; Interfaces; HETEROJUNCTION PHOTOCATALYST; HYDROTHERMAL SYNTHESIS; MOS2; NANOSHEETS; EFFICIENT; SHEETS; NANOCOMPOSITES; PHOTOACTIVITY; DEGRADATION; FABRICATION; FACETS;
D O I
10.1016/j.materresbull.2019.02.006
中图分类号
T [工业技术];
学科分类号
08 ;
摘要
A set of novel Ag2S/BiVO4 composites with different Ag2S content have been fabricated through a hydrothermal method and subsequent precipitation procedure using 3-mercaptopropionic acid (MPA) as a surface functionalization agent. The photocatalytic performance of the samples for RhB degradation was evaluated under visible-light irradiation. The results show that the Ag2S/BiVO4 composites present a much better photocatalytic activity than bare Ag2S and BiVO4. After 100 min visible-light irradiation, a maximum degradation rate of up to 95.1% has been obtained for Ag2S/BiVO4 composite containing 0.5 wt% Ag2S. The reason for improvement in visible-light-driven photocatalytic performance could be due to the increased visible-light absorption as well as the successful construction of suitable heterojunction structure between Ag2S and BiVO4. The active species trapping experiments confirm that .O-2(-) and h(+) are the primary active oxidizing species during the photo degradation process. A possible and reasonable photocatalytic degradation mechanism for the Ag2S/BiVO4 composites has been proposed.
引用
收藏
页码:175 / 181
页数:7
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