Selective oxidation of sulfides on Pt/BiVO4 photocatalyst under visible light irradiation using water as the oxygen source and dioxygen as the electron acceptor

被引：71
|
作者：
Zhang, Bao [1 ,2 ]
Li, Jun [1 ]
Zhang, Bingqing [1 ]
Chong, Ruifeng [1 ]
Li, Rengui [1 ]
Yuan, Bo [1 ,2 ]
Lu, Sheng-Mei [1 ]
Li, Can [1 ]
机构：
[1] Chinese Acad Sci, Dalian Inst Chem Phys, Dalian Natl Lab Clean Energy, State Key Lab Catalysis, Dalian 116023, Peoples R China
[2] Univ Chinese Acad Sci, Beijing 100049, Peoples R China
来源：
JOURNAL OF CATALYSIS | 2015年 / 332卷
基金：
中国国家自然科学基金;
关键词：
Photocatalysis; Bismuth vanadate; Selective oxidation; Isotopic labeling; Peroxy species; Sulfide oxidation; AEROBIC OXIDATION; ORGANIC-COMPOUNDS; SPIN-RESONANCE; NACL SOLUTION; OH RADICALS; TIO2; MECHANISM; GENERATION; CONVERSION; COMPLEXES;
D O I：
10.1016/j.jcat.2015.08.029
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：
Photocatalytic selective oxidation represents an environment-friendly strategy for chemical transformation. Herein, we report the oxidation of sulfides into sulfoxides with high selectivity (up to 99%) on Pt/BiVO4 photocatalyst in water under visible light illumination. The system exhibited excellent performance for the oxidation of sulfides in water compared with organic solvents. Isotopic oxygen ((H2O)-O-18) experiments clearly revealed that the oxygen atoms in the sulfoxide were mainly from water. Electron paramagnetic resonance demonstrated that the reactive oxygen species were the peroxy species, which were generated from water oxidation on BiVO4 via the two-electron pathway. Dioxygen was reduced to water through proton-coupled electron transfer. (C) 2015 Elsevier Inc. All rights reserved.
引用
收藏
页码：95 / 100
页数：6
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