|
|||||
|
|
| 纳米TiO2薄膜光催化降解2,4-二氯酚的动力学研究 | |
| 引用本文： | 孙振世,杨晔,陈英旭,朱松.纳米TiO2薄膜光催化降解2,4-二氯酚的动力学研究[J].环境科学学报,2003,23(6):716-720. |
| 作者姓名： | 孙振世 杨晔 陈英旭 朱松 |
| 作者单位： | 1. 国家环境保护总局 2. 浙江工业大学环境工程系,杭州,310032 3. 浙江大学环境工程系,杭州,310029 |
| 摘 要： | 以主波长为365nm的紫外光灯为光源，纳米TiO2薄膜为光催化剂，研究了2，4-二氯酚光催化降解的产物及Cl^-对2，4-二氯酚光催化反应动力学的影响，并进一步探讨了Cl对2，4-二氯酚光解影响的机理，2，4-二氯酚可以经光催化氧化被彻底矿化，结合外加Cl^-对2，4-二氯酚光催化降解的影响和L-H反应动力学分析，可以认为Cl^-对2，4-二氯酚光催化降解的抑制作用，是由于Cl^-与2，4-二氯酚在TiO2表面竞争同一活性位点所致。因此，当光催化反应进行到Cl^-在TiO2表面竞争性吸附较强时，在反应动力学方程中必须考虑Cl^-的竞争性作用。 |
| 关 键 词： | 纳米二氧化钛薄膜 光催化氧化 2，4-二氯酚 反应动力学 光催化降解 |
| 文章编号： | 0253-2468(2003)06-0716-05 |
| 收稿时间： | 2002/11/4 0:00:00 |
| 修稿时间： | 2002年11月4日 |
Photocatalytic degradation kinetics of 2,4-dichlorophenol on nanostructured TiO2 film |
|
| SUN Zhenshi,YANG Ye,CHEN Yingxu and ZHU Shong.Photocatalytic degradation kinetics of 2,4-dichlorophenol on nanostructured TiO2 film[J].Acta Scientiae Circumstantiae,2003,23(6):716-720. | |
| Authors: | SUN Zhenshi YANG Ye CHEN Yingxu and ZHU Shong |
| Institution: | Department of Environmental Engineering, Zhejiang University, Hangzhou 310029,Department of Environmental Engineering, Zhejiang University of Technology, Hangzhou 310032,Department of Environmental Engineering, Zhejiang University, Hangzhou 310029 and Department of Environmental Engineering, Zhejiang University, Hangzhou 310029 |
| Abstract: | Heterogeneous photocatalytic degradation of 2,4-dichlorophenol on TiO2 film illuminated by a 2×6W ultraviolet lamp had been investigated.The rate of oxidation of 2,4-dichlorophenol decreased obviously with the addition of chlorides.The data were described in terms of salt effects,surface active sites having adsorption properties and by Langmuir-Hinshelwood equation.The model provided the best fit to the data by assuming that inorganic anions inhibited the degradation of 2,4-dichlorophenol through competing with the initial substrates for oxidizing sites on the surface of TiO2.Therefore,the competition of chloride with 2,4-dichlorophenol must be involved in the kinetics of photocatalytic degradation of 2,4-dichlorophenol. |
| Keywords: | dichlorophenol photocatalysis degradation mechanism kinetics |
| 本文献已被 CNKI 维普 万方数据 等数据库收录！ | |
| 点击此处可从《环境科学学报》浏览原始摘要信息 | |
| 点击此处可从《环境科学学报》下载免费的PDF全文 | |