镍网负载纳米TiO_2对甲苯降解的实验研究  

Study of Toluene Degradation by Nano-TiO_2 Loading on the Nickel Net

作　　者：易长思[1] 李彦旭[1] 杜青平[1] 张国庆[1] 崔琦[1] 

机构地区：[1]广东工业大学,广州510006

出　　处：《工业安全与环保》2013年第4期70-73,共4页Industrial Safety and Environmental Protection

基　　金：国家自然基金(40971251);国家国际科技计划项目(2011DFB91560)

摘　　要：采用溶胶-凝胶法制备负载纳米TiO2的泡沫镍网,并利用自制的间歇式光催化反应装置对甲苯废气降解进行实验研究。考察了光源波长、湿度、含氧量、甲苯初始浓度等因素对甲苯去除率的影响,并对光催化剂的失活和再生进行了实验研究。结果表明,在光源波长为185 nm条件下,体系相对湿度为45%、含氧量为21%、甲苯初始质量浓度为208mg/m3,甲苯的去除率达97%以上,通过紫外光照射失活光催化剂12 h,其活性能基本恢复,对甲苯的去除率达87%以上。Titanium dioxide is prepared by sol-gel method and home-made intermittent photocatalysis reactions devices are used to study the degradation of toluene waste gas.The factors influencing the degradation of toluene are investigated,such as light wavelengths,system relative humidity and oxygen content,toluene initial concentration and so on and the experiments of inactivation and regeneration of photocatalyst are also conducted.The result indicates that,when the light wavelengths is 185 nm,system relative humidity is 45%,oxygen content is 21%,toluene initial concentration is 208 mg/m3,the removal rate of toluene can reach above 97%,the deactivation photocatalyst can be restored to its activity more than 87% in the ultraviolet light 12 hs.

关 键 词：光催化 二氧化钛 泡沫镍网 甲苯 

分 类 号：X511[环境科学与工程—环境工程] O643.32[理学—物理化学]