强悬浮性纳米TiO_2的制备、表征及光催化活性研究Ⅱ光催化活性研究  

Study of Photocatalytic Activity, Characterization and Preparation ofSupersuspended Nano-TiO_2 Study of Photocatalytic Activity

作　　者：赵金伟[1] 袁敏[2] 刘孝恒[1] 陈光[1] 

机构地区：[1]南京理工大学,江苏南京210094 [2]江苏出入境检验检疫局,江苏南京210001

出　　处：《光谱学与光谱分析》2004年第10期1221-1223,共3页Spectroscopy and Spectral Analysis

基　　金：国家博士后基金和南京理工大学博士后基金资助

摘　　要：将甲基橙溶液作为模拟废水 ,在紫外灯照射下 ,通过测量甲基橙溶液在 4 70nm处吸光度的变化 ,考察了热分解制备纳米TiO2 后处理过程中采用硅油淬火改性和自然冷却所得产物的光催化活性 ,并初步分析了两者光催化甲基橙的机理和在 35min内的降解率和动力学反应过程。结果表明 :两者均具有良好的光催化降解效果 ,且活性差别不大。但经硅油淬火改性的纳米TiO2 因在水中具有强悬浮性 。From the change in the absorption of methyl-orange solution at 470 nm, the photocatalytic activity of nano-TiO_2 prepared by pyrolysis method, and then by cooling treatment in silicon oil and in air respectively, was studied with methyl-orange solution as model waste water under irradiation by UV-lamp. Their photocatalytic mechanisms, the percentage of degradation in 35 min and the kinetic reactive process were also analyzed. The results show that the photocatalytic activity of both products is obvious with little (difference). However, the nano-TiO_2 powder modified with silicone oil can degrade harmful components more effectively on the surface of waste water with sunlight and other extra light.

关 键 词：强悬浮性纳米二氧化钛 制备 表征 光催化活性 工业废水处理 甲基橙 

分 类 号：X703.1[环境科学与工程—环境工程]