Cu2O/BiVO4 heterostructures: synthesis and application in simultaneous photocatalytic oxidation of organic dyes and reduction of Cr(VI) under visible light

被引：326
|
作者：
Yuan, Qing [1 ]
Chen, Lang [1 ]
Xiong, Miao [1 ]
He, Jie [1 ]
Luo, Sheng-Lian [1 ]
Au, Chak-Tong [1 ,2 ]
Yin, Shuang-Feng [1 ]
机构：
[1] Hunan Univ, Coll Chem & Chem Engn, State Key Lab Chemo Biosensing & Chemometr, Changsha 410082, Hunan, Peoples R China
[2] Hong Kong Baptist Univ, Dept Chem, Kowloon Tong, Hong Kong, Peoples R China
来源：
CHEMICAL ENGINEERING JOURNAL | 2014年 / 255卷
关键词：
Photocatalysis; Bismuth vanadate; Cuprous oxide; Heterojunction; Cr(VI); METHYLENE-BLUE; HYDROTHERMAL SYNTHESIS; HIGH-PERFORMANCE; TIO2; DEGRADATION; EFFICIENT; COMPOSITES; BIVO4; NANOPARTICLES; ENHANCEMENT;
D O I：
10.1016/j.cej.2014.06.031
中图分类号：
X [环境科学、安全科学];
学科分类号：
08 ; 0830 ;
摘要：
We synthesized Cu2O/BiVO4 composites by growing Cu2O nanoparticles on BiVO4 under mild condition. The optimized composite shows high photocatalytic efficiency in the simultaneous oxidation of organic dyes and reduction of Cr(VI) in neutral media. The XPS results confirm that the Cr(VI) adsorbed on Cu2O/BiVO4 was completely reduced to Cr(III). The photocatalyst can be used for the degradation of cationic or anionic dyes as well as a mixture of them under visible light irradiation. The photocatalytic activity of the composite can be ascribed to the heterojunctions between Cu2O and BiVO4, which facilitate the separation of photogenerated electrons and holes. The work demonstrates that the as-synthesized Cu2O/BiVO4 composite is a promising photocatalyst for the treatment of wastewater that contains organic dyes and Cr(VI) ions. (C) 2014 Elsevier B.V. All rights reserved.
引用
收藏
页码：394 / 402
页数：9
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