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几种偶氮染料的光催化降解研究
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摘要:
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,
关键词:  偶氮染料 H2O3 TiO3 光催化降解 印染废水处理
DOI:
基金项目:安徽省自然科学基金;;
Study on the Photocatalytic Degradation of Azo-dyestuff in Aqueous Solution
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Abstract:
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
Key words:  azo dyestuff,H_2O_2,TiO_2,photocatalytic degradation

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