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
收藏
页码：243 / 250
页数：8
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