| Photocatalytic properties of BiOX （X = Cl,Br, and Ⅰ） |
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| 作者姓名： | AN Huizhong DU Yi WANG Tianmin WANG Cong HAO Weichang ZHANG Junying |
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| 作者单位： | Center of Condensed Matter and Materials Physics, School of Science, Beihang University, Beijing 100083, China |
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| 基金项目： | 国家自然科学基金，教育部新世纪优秀人才支持计划，the Foundation from engineering Research Institute |
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| 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.
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| 关 键 词： | 光催化剂 若丹明B 异丙醇 BiOCl BiOBr BiOI |
| 收稿时间： | 18 June 2007 |
| 修稿时间： | 29 August 2007 |
Photocatalytic properties of BiOX (X = Cl, Br, and I) |
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| AN Huizhong DU Yi WANG Tianmin WANG Cong HAO Weichang ZHANG Junying.Photocatalytic properties of BiOX (X = Cl, Br, and I)[J].Rare Metals,2008,27(3):243-250. |
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| Authors: | AN Huizhong DU Yi WANG Tianmin WANG Cong HAO Weichang ZHANG Junying |
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| Affiliation: | Center of Condensed Matter and Materials Physics, School of Science, Beihang University, Beijing 100083, China |
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| Abstract: | 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 O2 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. |
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| Keywords: | photocatalysis rhodamine B isopropanol O2 evolution BiOCl BiOBr BiOI |
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