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La2O3-ZnO-TiO2光催化降解活性艳红及其动力学研究 被引量:3

PHOTOCATALYTIC DEGRADATION OF REACTIVE BRILLIANT RED BY La_2O_3-ZnO-TiO_2 AND ITS KINETICS
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摘要 采用溶胶-凝胶法制备了La2O3(0.5%)-ZnO(20%)-TiO2光催化剂(LZT),在自制的光催化反应器中,以20W紫外灯为光源,考察了通气量、pH、LZT投加量、溶液初始浓度等对光催化降解活性艳红K-2BP的影响规律。结果表明,当通气量为800mL·min-1,pH为3.12,催化剂投加量为4.0g·L-1,溶液初始浓度为65mg·L-1,光照60min时,活性艳红K-2BP的降解率可达100%,反应速率常数较光致反应高一个数量级。在初始浓度低于100mg·L-1时,降解过程显著表现为一级反应,并可用Langmuir-Hinshelwood动力学方程描述。 La2O3(0.5%)-ZnO(20%)-TiO2(LZT) photocatalyst was prepared by Sol-Gel method. The effect of the photocatalytic degradation of reactive brilliant red K-2BP by using 20 W ultraviolet lamp in self-made photocatalytic reactor were researched through the ventilatory volume, pH, LZT added quantity, solution initial concentration. The results showed that the illumination time is 60 min, the decolorization rate of the reactive brilliant r ed K-2BP can reach 100% when the ventilatory is 800 mL·min^-1, pH is 3.12, the catalyst quantity is 4.0 g·L^-1, solution initial concentration is 65mg·L^-1. The reaction rate constants can be improved an order higher than photoproduction. When the initial concentration was lower than 100 mg·L^-1, the degradation process obvious followed the first-order reaction, and it could described by the Langmuir-Hinshelwood kinetic equation.
出处 《水处理技术》 CAS CSCD 北大核心 2008年第12期32-35,共4页 Technology of Water Treatment
基金 西安工程大学高级氧化功能实验室基金(ZD20050312) 陕西省教育厅专项科研计划(07JK248)
关键词 La2O3-ZnO-TiO2 光催化 降解率 活性艳红 La2O3-ZnO-TiO2 photocatalytic degradation rate reactive brilliant red
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