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

作　　者：AN Huizhong DU Yi WANG Tianmin WANG Cong HAO Weichang ZHANG Junying 

机构地区：[1]Center of Condensed Matter and Materials Physics, School of Science, Beihang University, Beijing 100083, China

出　　处：《Rare Metals》2008年第3期243-250,共8页稀有金属（英文版）

基　　金：This study was financially supported by the National Natural Science Foundation of China(No.50471004);the Program for New Century Excellent Talents in Universities,and the Foundation from Engineering Research Institute,Peking University(No.204031)

摘　　要：A novel series of photocatalysts, bismuth oxyhalide （BiOX, X = Cl, Br, and Ⅰ）, were synthesized by a hydrolysis method. The powder sampies 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, andⅠ） were 3.44, 2.76, and 1.85 eV, respectively. BiOBr showed the highest photocatalytic activity in degrading rhodamine B （RhB） and evolving 02 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.A novel series of photocatalysts, bismuth oxyhalide （BiOX, X = Cl, Br, and Ⅰ）, were synthesized by a hydrolysis method. The powder sampies 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, andⅠ） were 3.44, 2.76, and 1.85 eV, respectively. BiOBr showed the highest photocatalytic activity in degrading rhodamine B （RhB） and evolving 02 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.

关 键 词：PHOTOCATALYSIS rhodamine B ISOPROPANOL O2 evolution BiOCl BiOBr BiOI 

分 类 号：TQ422[化学工程]