Ag/AgCl/Ag2MoO4 composites for visible-light-driven photocatalysis

被引：67
作者：
Jiao, Zhongyi [1 ]
Zhang, Junlei [1 ]
Liu, Zhendong [1 ]
Ma, Zhen [1 ,2 ]
机构：
[1] Fudan Univ, Dept Environm Sci & Engn, Shanghai Key Lab Atmospher Particle Pollut & Prev, Shanghai 200433, Peoples R China
[2] Shanghai Inst Pollut Control & Ecol Secur, Shanghai 200092, Peoples R China
来源：
JOURNAL OF PHOTOCHEMISTRY AND PHOTOBIOLOGY A-CHEMISTRY | 2019年 / 371卷
基金：
中国国家自然科学基金;
关键词：
AgCl; Ag2MoO4; Photocatalysis; Degradation; Dyes; HIGH-EFFICIENCY; BETA-AG2MOO4/G-C3N4; HETEROJUNCTION; PLASMONIC PHOTOCATALYSTS; HYDROTHERMAL SYNTHESIS; FACILE SYNTHESIS; SILVER CHROMATE; AG2MO4; M; DEGRADATION; PERFORMANCE; NANOSTRUCTURES;
D O I：
10.1016/j.jphotochem.2018.11.003
中图分类号：
O64 [物理化学（理论化学）、化学物理学];
学科分类号：
070304 ; 081704 ;
摘要：
Ag2MoO4 shows low photocatalytic activity under visible light. It would be interesting to develop Ag2MoO4-based composite/heterojunction photocatalysts working efficiently under visible light. Herein, novel Ag/AgCl/Ag2MoO4 composites were obtained via photoreduction of AgCl/Ag2MoO4 composites prepared by sequential precipitation. The composition, morphologies, and optical properties of the samples were studied via various characterization techniques. Photocatalytic degradation of rhodamine B (RhB), methylene blue (MB), methyl orange (MO), norfloxacin (NOF), and tetracycline hydrochloride (TC) solutions was conducted under visible-light irradiation. An optimal Ag/AgCl/Ag2MoO4 catalyst showed much higher photocatalytic activity than Ag2MoO4, and it also showed reasonably fine recyclability. Through radical-capturing experiments, photo-generated holes (h(+)) were determined to be the main active species whereas hydroxyl radicals ((OH)-O-center dot) were found to play a secondary role in photocatalysis. Possible photocatalytic mechanisms were proposed.
引用
收藏
页码：67 / 75
页数：9
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