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载金TiO2纳米管光催化降解硝基苯废水

发表时间:2011-12-31  浏览量:1720  下载量:495
全部作者: 周永,江芳,孟繁春
作者单位: 南京理工大学环境与生物工程学院
摘 要: 以水热法制备的TiO2纳米管(TiO2-nanotube,TNT)为基体,采用光还原法在TNT纳米管上沉积贵金属金制备出载金TiO2纳米管(Au/TNT)。以硝基苯为目标物,分析了载金前后TNT对硝基苯的光催化性能的变化,并探讨TNT的焙烧温度、金掺杂量,以及反应体系pH值对Au/TNT光催化性能的影响。结果表明:负载金后的TNT对硝基苯的光催化去除率较负载前有明显提高;以400℃焙烧的TNT上负载质量分数为0.1%金的Au/TNT为光催化剂,在硝基苯浓度为100 mg/L,催化剂用量为0.4 g/L,pH值为3.02的条件下,Au/TNT对硝基苯的光催化去除率可达99.8%.
关 键 词: 环境工程;TiO2纳米管;负载金;光还原法;光催化;硝基苯
Title: Photocatalytic performance of Au doped titania nanotube for nitrobenzene
Author: ZHOU Yong, JIANG Fang, MENG Fanchun
Organization: School of Environmental & Biological Engineering, Nanjing University of Science & Technology
Abstract: Au-doped TiO2 nanotubes (Au/TNT) were prepared by photo-reduction method on the surface of TiO2 nanotubes (TNT). The paper takes the nitrobenzene as a probe to analyze the changes of the photocatalytic properties of TiO2 nanotubes between Au doped before and after, and studies the effects of calcination temperature of TNT, amount of doped Au and pH on the photocatalytic activities of Au/TNT for nitrobenzene removal. The results showed that Au doping enhanced the photocatalytic efficiency of TNT for nitrobenzene. The TNT calcined at 400℃, doped with 0.1% (mass percentage) Au showed the highest photocatalytic activity. After irradiation for 140 min, the photocatalytic removal rate of Au/TNT for nitrobenzene reached 99.8% with the initial concentration of nitrobenzene 100 mg/L and the amount of photocatalyst 0.4 g/L.
Key words: environmental engineering; titania nanotube; Au doped; photo-reduction method; photocatalytic activity; nitrobenzene
发表期数: 2011年12月第24期
引用格式: 周永,江芳,孟繁春. 载金TiO2纳米管光催化降解硝基苯废水[J]. 中国科技论文在线精品论文,2011,4(24):2272-2277.
 
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