分散染料的纳米TiO_2光催化脱色  

Photocatalytic decolorization of disperse dyes with nano TiO_2

作　　者：陆同庆[1] 龙家杰[1] 卢毅[1] 

机构地区：[1]苏州大学纺织与服装工程学院,江苏苏州215021

出　　处：《印染》2010年第3期11-15,共5页China Dyeing and Finishing

摘　　要：以低压紫外汞灯为光源,纳米材料为光催化剂,探讨不同类型纳米粉体对水溶液中分散染料的光催化脱色特性。结果表明,N掺杂TiO2纳米光催化剂和TiO2酸性分散液的光催化脱色效果较佳;溶液pH值、催化剂用量、光催化时间对分散染料溶液的脱色率有较大的影响;H2O2、Al3+和Fe2+的加入,有助于提高光催化脱色率;杂环、杂环偶氮类和偶氮苯类结构的分散染料均比蒽醌类容易被光催化降解脱色,染料中所含的取代基对其光催化脱色性能有重要影响。Taking ultraviolet low pressure mercury lamp as a light source and nano materials as photocatalysts, photocatalytic decolorization characteristics of disperse dyes in aqueous solution with different nano particles were studied. Results showed that photocatalytic decolorization effects of N-clopped nano-TiO2 photocatalyst and commercial acidic TiO2 dispersion were better than the others. Dosage of photocatalyst, pH value, photocatalytic time exerted obvious influences on decolorization rate. It would enhance dye decolorization rate with addition of H2 02 , AI3 ~ and Fe2~. Disperse dyes with heterocyclic, heterocyclic di- azo and azobenzol structure were easier to be decolorized than anthraquinone ones. Substituting groups in disperse dyes had a significant impact on photocatalytic decolorization.

关 键 词：废水处理 分散染料 纳米材料 光催化 脱色 

分 类 号：TS199[轻工技术与工程—纺织化学与染整工程]