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.
出处
《印染》
北大核心
2010年第3期11-15,共5页
China Dyeing and Finishing
关键词
废水处理
分散染料
纳米材料
光催化
脱色
waste water treatment
disperse dyes
nanometer material
photocatalysis
decolorization
