Photocatalytic properties of BiOX (X = Cl, Br, and I)

被引：301

作者：

An Huizhong ^{[1
]}

Du Yi ^{[1
]}

Wang Tianmin ^{[1
]}

Wang Cong ^{[1
]}

Hao Weichang ^{[1
]}

Zhang Junying ^{[1
]}

机构：

[1] Beihang Univ, Sch Sci, Ctr Condensed Mat & Mat Phys, Beijing 100083, Peoples R China

来源：

RARE METALS | 2008年 / 27卷 / 03期

基金：

中国国家自然科学基金;

关键词：

photocatalysis; rhodamine B; isopropanol; O-2; evolution; BiOCl; BiOBr; BiOI;

D O I：

10.1016/S1001-0521(08)60123-0

中图分类号：

T [工业技术];

学科分类号：

08 ;

摘要：

A novel series of photocatalysts, bismuth oxyhalide (BiOX, X = Cl, Br, and I), were synthesized by a hydrolysis method. The powder samples were characterized by the use of X-ray diffraction (XRD), scanning electron microscope, and UV-Vis spectrophotometer. The XRD pattern showed that all the BiOX were well crystallized in the tetragonal structure. The band gaps of the sheet-shaped compounds BiOX (X Cl, Br, and I) were 3.44, 2.76, and 1.85 eV, respectively. BiOBr showed the highest photocatalytic activity in degrading rhodamine B (RhB) and evolving O-2 for its proper valence band (VB). BiOI has no photocatalytic activity. BiOCl showed the highest activity in decomposing isopropanol because of electron-hole pair separation through trapping electrons by oxygen vacancies.

引用

页码：243 / 250

页数：8

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