摘要
采用TiO2胶体合成—不锈钢金属网表面浸渍提拉法镀TiO2胶体膜—焙烧工艺制备网固定TiO2薄膜光催化材料,并以偶氮染料废水为降解对象,研究了镀膜次数、焙烧温度以及偶氮染料初始浓度对材料光催化活性的影响。结果表明:镀膜5次后在700℃下焙烧2 h,可以得到光催化性能优异的金属网固定TiO2薄膜。用该制品对浓度为27 mg/L的偶氮染料废水光降解3 h,降解脱色率达到99.07%。TiO2晶体膜在金属网表面键合牢固,重复使用仍保持良好的光催化活性。
The effects of film coating number, roasting temperature and initial concentration of azo dye on the photocatalytic activity of immobilized titanium dioxide film of metal wire net were investigated, which was prepared by TiO2 colloid synthesis, TiO2 colloid film coating on stainless steel net surface by dip-coating method and then its immobilization on the net by roasting. The results indicate that the film can have excellent photocatalytic performances when roasted at 600 700 ℃ for 2 hours. When it is used to make a photo degradation for three hours for 27 mg/L azo dye, the decolorization rate of azo dye reaches 99.07%. The crystal film is bonded tightly on the metal net surface t, and will keep a good photocatalytic activity when the film is used repeatedly.
出处
《金属矿山》
CAS
北大核心
2008年第10期126-130,共5页
Metal Mine
基金
国家863计划项目(编号:2007AA06z123)
澳大利亚国家研究计划项目(编号:LP0562076)
关键词
网固定TiO2薄膜
光催化
偶氛染料
镀膜次数
焙烧温度
TiO2 film immobilized on wire net, Photocatalysis
azo dye, Film coating number, Roasting temperature
作者简介
雷绍民（1953-），男，武汉理工大学资源与环境工程学院，教授，430070湖北省武汉市珞狮路122号。
