| 紫外线预照射对TiO2上三氯乙烯气相光催化氧化反应的影响 |
| |
| 引用本文： | 赵莲花,山下孝子,伊藤公纪,村林真行.紫外线预照射对TiO2上三氯乙烯气相光催化氧化反应的影响[J].催化学报,2005,26(4):307-310. |
| |
| 作者姓名： | 赵莲花 山下孝子 伊藤公纪 村林真行 |
| |
| 作者单位： | 延边大学理工学院，吉林延吉 133002;横滨国立大学大学院环境情报研究院, 横滨 240-8501, 日本 |
| |
| 基金项目： | 教育部留学回国人员科研启动基金 |
| |
| 摘 要： | 用紫外线照射法对TiO2光催化剂进行了预处理,并利用热重分析比较了预照射法和高温加热法对TiO2上三氯乙烯气相光催化氧化反应的影响. 结果表明,紫外线预照射可加快三氯乙烯的气相光催化反应. 这可能是紫外线预照射使TiO2 的表面状态和表面结构发生了变化,使催化剂表面活性基团羟基自由基的量增加所致.
|
| 关 键 词： | 紫外线预照射 二氧化钛 三氯乙烯 气相光催化氧化 |
| 文章编号： | 0253-9837(2005)04-0307-04 |
| 收稿时间： | 2005-04-25 |
Effect of Ultraviolet Pre-irradiation on Photocatalytic Oxidation of Trichloroethylene over TiO2 in Gas Phase |
| |
| ZHAO Lianhua,Kyouko YAMASHIDA,Kiminori ITOH,Masayuki MURABAYASHI.Effect of Ultraviolet Pre-irradiation on Photocatalytic Oxidation of Trichloroethylene over TiO2 in Gas Phase[J].Chinese Journal of Catalysis,2005,26(4):307-310. |
| |
| Authors: | ZHAO Lianhua Kyouko YAMASHIDA Kiminori ITOH Masayuki MURABAYASHI |
| |
| Abstract: | The effects of UV pre-irradiation and heat treatment at high temperature on the photocatalytic activity of TiO_2 for the oxidation of trichloroethylene in gas phase were studied. The results showed that photocatalytic oxidation of trichloroethylene on TiO_2 was accelerated by the UV pre-irradiation. The mass loss of the TiO_2 catalyst after UV pre-irradiation was obviously less than that after heat treatment, however, its photocatalytic activity was resemble under the two kinds of pre-treatments. The amount of hydroxyl free radicals on the TiO_2 surface was changed by UV irradiation. This may result from the change in the surface structure of TiO_2 and the increase in the concentration of hydroxyl free radicals during the UV irradiation. |
| |
| Keywords: | ultraviolet pre-irradiation titania trichloroethylene gas-phase photocatalytic oxidation |
| 本文献已被 CNKI 维普 万方数据 等数据库收录！ |
| 点击此处可从《催化学报》浏览原始摘要信息 |
| 点击此处可从《催化学报》下载免费的PDF全文 |
