| Ag/TiO2,Pd/TiO2和TiO2对庚烷的光催化氧化活性 |
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| 引用本文： | 刘洋,尚静.Ag/TiO2,Pd/TiO2和TiO2对庚烷的光催化氧化活性[J].北京联合大学学报(自然科学版),2005,19(4):46-49. |
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| 作者姓名： | 刘洋 尚静 |
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| 作者单位： | 1. 北京联合大学,应用文理学院,北京,100083
2. 北京大学,环境学院,北京,100871 |
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| 摘 要： | 用光沉积法制备Ag/TiO2和Pd/TiO2催化剂样品,然后用表面光电压谱(SPS)和紫外可见吸收光谱(UV-Vis)对样品进行表征.以气态庚烷为反应体系,来比较上述两种催化剂的光催化活性.与纯TiO2比较,Ag和Pd的存在提高了TiO2的光催化活性;其原因可解释为金属Ag或Pd捕获电子,从而提高了电子-空穴对的分离效率;结果还表明与Pd/TiO2催化剂相比,Ag/TiO2表现出较高的光催化活性,这主要是Ag比Pd具有较强的捕获电子的能力.
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| 关 键 词： | 光催化氧化 庚烷 Ag/TiO2 Pd/TiO2 庚烷 光催化氧化活性 Activity Photocatalytic Heptane 能力 表现 结果 分离效率 空穴对 电子 金属 解释 存在 光催化活性 比较 反应体系 气态 表征 紫外可见吸收光谱 |
| 文章编号： | 1005-0310（2005）04-0046-04 |
| 收稿时间： | 2005-01-07 |
| 修稿时间： | 2005-09-22 |
Photocatalytic Activity of Ag/TiO2, Pd/TiO2 and TiO2 for the Photocatalytic Oxidation of Gaseous Heptane |
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| LIU Yang,SHANG Jing.Photocatalytic Activity of Ag/TiO2, Pd/TiO2 and TiO2 for the Photocatalytic Oxidation of Gaseous Heptane[J].Journal of Beijing Union University,2005,19(4):46-49. |
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| Authors: | LIU Yang SHANG Jing |
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| Institution: | 1. College of Arts and Science of Beijing Union University, Beijing 100083, China ; 2. College of Environment, Peking University, Beijing 100871,China |
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| Abstract: | Ag/TiO2 and Pd/TiO2 samples were prepared by photodeposition, and then characterized by SPS and UV-Vis absorbance spectroscopy. The photocatalytic reactivity of the samples were tested by the gas-phase photocatalytic oxidation of heptane. The presence of metallic silver or palladium provides TiO2 higher photocatalytic activity. The possible explanation could be the increase of the electron-hole pair separation efficiency induced by metallic silver or palladium. Moreover, Ag/TiO2 has higher photoactivity than Pd/TiO2. The difference could be due to the fact that Ag has higher work-function than Pd. |
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| Keywords: | photocatalytic oxidation heptane Ag/TiO2 Pd/TiO2 |
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