可见光响应型光催化降膜反应器的开发及其性能研究  

THE VISIBLE LIGHT RESPONSE REACTOR OF PHOTOCATALYSIS FALLING FILM DESIGN AND ITS APPLICATION

作　　者：凤晓华[1] 梁文懂[1] 

机构地区：[1]武汉科技大学化工与资源环境学院,湖北武汉430081

出　　处：《水处理技术》2009年第1期79-82,共4页Technology of Water Treatment

摘　　要：二氧化钛作为光催化剂在降解有机污染物等领域有很好的应用前景,高效二氧化钛光催化反应器的制备则是大规模应用需要解决的关键问题。针对现有光催化反应器中存在的问题,结合TiO2两种光致特性,开发出具有可见光响应效应的光催化降膜反应器。以普通荧光灯作为模型光源,以亚甲基蓝为模拟污染物,对圆管降膜流动的行为进行研究,得到描述降膜流动的数学模型。并据此得出不同流量下液膜厚度的计算公式。液膜最佳厚度为0.155cm,在荧光灯下,亚甲基蓝降解率可达50%以上,降解效果明显。Titanium dioxide photocatalyst has a promising perspective at the degradation of organism pollutant, but it is difficult to resolve large-scale application for TiO2 photo-catalytic reactor with high photocatalytic activity. After analysizing photocatalytic reactor structure, sol-gel method was used to prepare nitrogen doped TiO2 film as the mainly reactor part ofvisible light response oflaminar falling film reactor. The fluorescent lamp was chosen as simulation light resource and photocatalytic degradation methylene blue（MB） as model reaction, The model of falling liquid film can be obtained by the research of the action of falling liquid film, and the result of liquid film thickness in the different flux can be counted. Reactor film thickness is 0.155 cm, the photoeatalytic degradation can achieve above 50% through three hours reaction, degradation effect is remarkable and realize the visible light response.

关 键 词：TIO2薄膜 光催化降膜反应器 亲水性能 流动性能 

分 类 号：TQ032[化学工程]