几种偶氮染料的光催化降解研究

以高压汞灯、ＵＶ灯、太阳光为光源，进行Ｈ２Ｏ２、ＴｉＯ２对酸性品红、活性太红、刚果红、结晶紫及混合染料等几种偶氮染料光催化降解研究。结果表明：ＴｉＯ２、Ｈ２Ｏ２对几种偶氮染料具有较强的光催化降解脱色效果，在ｐＨ在３或９时，Ｈ２Ｏ２的浓度为００．４％或ＴｉＯ２浓度为０．２５％时，其脱色率最高；ＴｉＯ２的光催化脱色效果强于Ｈ２Ｏ２的作用，且混合催化剂的光催化脱色作用更强；光催化降解属于一级动力学反应，

Study on the Photocatalytic Degradation of Azo-dyestuff in Aqueous Solution

Photocatalytic degradation of five azo dyestuff by H 2O 2 and TiO 2 were studied under the high pressure mercury lamp,UV lamp and sunlight H 2O 2 and TiO 2 had a significant photocatalytic decolorizing effect on these dyes When the dyes pH was 3 or 9, concentrations of H 2O 2and TiO 2 were 0 4% and 0 25%,they showed the highest decolorizing rate The decolorizing effect of TiO 2 was better than that of H 2O 2 The mix catalytic showed a even better decolorizing effect The reaction of photo catalytic degradation was first order reaction in kinetics There was a positive relationship between remove ratio of COD and decolorizing ratio