Synthesis and photocatalytic mechanism of visible-light-driven Ag/AgBr/(I/S) composites for organic dyes degradation

被引：14
作者：
Li, Li [1 ]
Yang, Xiande [1 ]
Xie, Chuanfang [1 ]
Wang, Yongqian [2 ]
Wei, Liang [1 ]
Yang, Jing [1 ]
机构：
[1] Nanning Normal Univ, Guangxi Key Lab Nat Polymer Chem & Phys, Nanning 530001, Peoples R China
[2] China Univ Geosci, Fac Mat Sci & Chem, Minist Educ, Engn Res Ctr Nanogeomat, 388 Lumo Rd, Wuhan 430074, Peoples R China
来源：
OPTICAL MATERIALS | 2022年 / 123卷
基金：
中国国家自然科学基金;
关键词：
Ag/AgBr; Illite/smectite clay; Organic dye; Photocatalytic mechanism; AG-AT-AGCL; HIGHLY EFFICIENT; HOLLOW MICROSPHERES; MONTMORILLONITE; FABRICATION; NANOCOMPOSITE; CATALYST; CLAY; COLI; UV;
D O I：
10.1016/j.optmat.2021.111947
中图分类号：
T [工业技术];
学科分类号：
08 ;
摘要：
Series of visible light responsive Ag/AgBr/(I/S) composites based on I/S were synthesized by deposition-precipitation method. Methyl orange (MO) and other organic dyes were used to evaluate the photoactivity of Ag/AgBr/(I/S) composites. The results showed that Ag/AgBr/(I/S) composites display a good photocatalytic activity for organic dyes degradation. As the content of Ag/AgBr was 25 wt%, Ag/AgBr/(I/S) composites exhibited the best the photocatalytic activity for organic dyes. The degradation rate of Rhodamine B (RhB) and MO were 90% and 92% after 20 min. Furthermore, cycling experiments revealed that the 25%Ag/AgBr/(I/S) composites had long-term recycling stability. The photocatalytic mechanism of Ag/AgBr/(I/S) composites to MO degradation was studied by free radical trapping experiments and electron paramagnetic resonance (EPR) test, which indicating that photogenerated center dot O-2(-) is the dominant reactive specie.
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页数：9
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