| Reaction site and mechanism in the UV or visible light induced TiO2 photodegradation of Orange G |
| |
| 作者姓名： | YANG Shi-ying LOU Li-ping WU Xiao-n CHEN Ying-xu |
| |
| 作者单位： | [1]Department of Environmental Engineering, Zhejiang University, Hangzhou 310029, China [2]College of Environmental Science and Engineering, Ocean University of China, Qingdao 266003, China |
| |
| 基金项目： | The Bureau of Science and Technology of Zhejiang Province（No. 2003C33040）; |
| |
| 摘 要： | For TiO2 heterogeneous reaction, the reaction site and the detailed mechanism are interesting and controversy topics. In this paper, effects of surface fluorination of TiO2 on the photocatalytic degradation of an azo dye, Orange G（OG） under UV or visible light irradiation were investigated, and the possible reaction site and mechanism were elucidated. The adsorption of OG on TiO2 was nearly inhibited by fluoride but its UV light induced photodegradation rate was greatly increased by a factor of about 2.7, which was due to the more generated free hydroxyl radicals. It supported the views that fluoride could desorb the oxidant species from surface and that the reaction sites could move to the bulk solution. In TiO2/Vis system, the observed inhibition effects of fluorination could be interpreted by the competitive adsorption, which provided additional evidences that the visible light sensitized photodegradation of dye pollutants on the catalyst surface.
|
| 关 键 词： | 可见光 催化剂 光催化 氟化作用 染料 环境污染 水处理 |
| 文章编号： | 1001-0742（2006）01-0180-04 |
| 收稿时间： | 2005-03-03 |
| 修稿时间： | 2005-04-21 |
Reaction site and mechanism in the UV or visible light induced TiO2 photodegradation of Orange G |
| |
| YANG Shi-ying,LOU Li-ping,WU Xiao-n,CHEN Ying-xu.Reaction site and mechanism in the UV or visible light induced TiO2 photodegradation of Orange G[J].Journal of Environmental Sciences,2006,18(1):180-183. |
| |
| Authors: | YANG Shi-ying LOU Li-ping WU Xiao-na and CHEN Ying-xu |
| |
| Institution: | 1. Department of Environmental Engineering, Zhejiang University, Hangzhou 310029, China; College of Environmental Science and Engineering, Ocean University of China, Qingdao 266003, China
2. Department of Environmental Engineering, Zhejiang University, Hangzhou 310029, China |
| |
| Abstract: | For TiO2 heterogeneous reaction, the reaction site and the detailed mechanism are interesting and controversy topics. In this paper, effects of surface fluorination of TiO2 on the photocatalytic degradation of an azo dye, Orange G(OG |
| |
| Keywords: | photocatalytic degradation mechanism adsorption fluorination dye pollutants |
| 本文献已被 维普 万方数据 等数据库收录！ |
| 点击此处可从《环境科学学报(英文版)》浏览原始摘要信息 |
| 点击此处可从《环境科学学报(英文版)》下载免费的PDF全文 |
