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MWNTs/TiO_2对典型氯苯类化合物的光催化降解研究

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成果类型:
期刊论文
作者:
张伟;李黎武;张茜;徐舜开;张骅
通讯作者:
Zhang, W.
作者机构:
[李黎武] Department of Auburn Construction, Hunan City University, Yiyang 413000, China
College of Civil Engineering, Hunan University, Changsha 410082, China
Key Laboratory of Building Safety and Energy Efficiency, Hunan University, Changsha 410082, China
[张伟] Department of Auburn Construction, Hunan City University, Yiyang 413000, China<&wdkj&>College of Civil Engineering, Hunan University, Changsha 410082, China<&wdkj&>Key Laboratory of Building Safety and Energy Efficiency, Hunan University, Changsha 410082, China
[张茜; 徐舜开; 张骅] College of Civil Engineering, Hunan University, Changsha 410082, China<&wdkj&>Key Laboratory of Building Safety and Energy Efficiency, Hunan University, Changsha 410082, China
通讯机构:
Department of Auburn Construction, Hunan City University, China
语种:
中文
关键词:
复合光催化剂(MWNTs/TiO2);氯苯类化合物;光催化降解;动力学;路径
关键词(英文):
catalysis;chlorobenzene;concentration (composition);experimental study;oxide;photodegradation;reaction kinetics
期刊:
环境科学学报
ISSN:
0253-2468
年:
2012
卷:
32
期:
3
页码:
631-638
基金类别:
国家自然科学基金资助项目(No.50778065); 湖南省科学计划资助项目(No.2010SK3042); 湖南省教育厅重点科研资助项目(No.11A022)~~;
机构署名:
本校为第一且通讯机构
院系归属:
市政与测绘工程学院
摘要:
研究复合光催化剂MWNTs/TiO2对典型氯苯类有机化合物光催化降解动力学及主要光降解路径.结果表明,同一初始浓度和相同光催化降解实验条件下,60min时典型氯苯类有机化合物的光降解率均达到90%以上.其中六氯苯和五氯苯的光催化降解速率常数分别为0.0664h-1和0.0670h-1,其大小明显高于其它氯苯类化合物.1,二氯苯的光催化降解反应速率常数仅为0.0430h4--1,在典型氯苯类化合物中最小.三氯苯的3种同分异构体——1,3-三氯苯、24-三氯苯和1,5-三氯苯的光催化降解速率常数分别为0.0547h2,1,,3,-1、0445h0.-1和0.0439h-1.六氯苯的主要光催化降解路径为:HCB→PeCB→1,2,3,5-TeCB→1,2,4-TCB→1,4-DCB.
摘要(英文):
The photodegradation kinetics and the main photodegradation process of typical chlorobenzene compounds by Multi-walled Carbon Nanotubes coated with titanium dioxide (MWNTs/TiO 2) were investigated. The results showed that the photodegradation rate of the typical chlorobenzene compounds could achieve 90% at 60 min with the same initial concentration and experimental conditions of photodegradation. The photodegradation rate constants of hexachlorobenzene (HCB) and pentachlorobenzene (PeCB) were 0.0664 h -1 and 0.0670 h -1, respectively, which wer...

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