Photocatalytic study of BiOCl for degradation of organic pollutants under UV irradiation

被引:173
作者
Chen, Feng [1 ]
Liu, Hongqi
Bagwasi, Segomotso
Shen, Xingxing
Zhang, Jinlong
机构
[1] E China Univ Sci & Technol, Key Lab Adv Mat, Shanghai 200237, Peoples R China
基金
美国国家科学基金会;
关键词
BiOCl; Chlorides; Chlorine radical; Photocatalysis; Photostability; VISIBLE-LIGHT; TITANIUM-DIOXIDE; METHYL-ORANGE; TIO2; SURFACES; WATER; DECOLORIZATION; GEOCHEMISTRY; FLUORESCENCE; EFFICIENT; SUNLIGHT;
D O I
10.1016/j.jphotochem.2010.07.026
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
BiOCl exhibited high photocatalytic activities for the degradation of rhodamine B, methyl orange and phenol. Surface chloride ions were adverse to the BiOCl photocatalysis and dissociated from BiOCl via reaction with photogenerated holes and electrons under UV irradiation. Conduction band electrons of BiOCl directly reduced either chlorine radical or the azo-bond of MO during the photocatalytic process. Hydroxyl radical was the main oxidative species in the BiOCl photocatalysis, whose generation can be accelerated via enhancing the conduction band electron consumption by MO. After the photocatalytic reaction, the dissolved chloride ion would spontaneously recombine back to the BiOCl photocatalyst. hence qualifies BiOCl as a practical high-activity photocatalyst with long lifetime. (C) 2010 Elsevier B.V. All rights reserved.
引用
收藏
页码:76 / 80
页数:5
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