CuO/TiO_2-H_2O_2可见光催化亚甲基蓝脱色效果及影响因素研究  

Study on decolorization effect and influencing factors of methylene blue in CuO/TiO_2-H_2O_2 photocatalytic system under visible light

作　　者：吉芳英[1] 邱雁[1] 徐璇[1] 袁云松[1] 

机构地区：[1]重庆大学三峡库区生态环境教育部重点实验室,重庆400045

出　　处：《环境工程学报》2008年第6期743-747,共5页Chinese Journal of Environmental Engineering

基　　金：国家自然科学基金资助项目(50278101);教育部博士点基金(20070611009);重庆市2005年重点科技攻关项目(CSTC;2005AB7030)

摘　　要：以水解法制备的锐钛矿型TiO2为载体,制备了CuO/TiO2型光催化剂。以亚甲基蓝为对象,在可见光照射下研究了H2O2加入量、pH值和催化剂投加量对脱色效果的影响,同时与改性前的TiO2催化剂进行了脱色效果的对比。结果表明亚甲基蓝在碱性条件下能较好脱色,H2O2用量和CuO/TiO2催化剂投加量分别为每1 000 mL反应液各加入10 mL和0.1 g时脱色最好;另外,TiO2催化剂也在碱性条件下能较好脱色,H2O2用量和催化剂投加量分别为每1 000 mL反应液各加入12.5 mL和0.1 g时脱色最好。最优条件下对比实验表明,CuO/TiO2型催化剂在可见光照射下具有很高的催化活性,亚甲基蓝2 h脱色率达到88%,远好于改性前的TiO2和Degussa P25催化剂。The TiO2 powder photocatalyst was prepared by hydrolyze method, and CuO/TiO2 photocatalyst was prepared by CuO supported on these TiO2. Influence of H2O2 concentration, pH value and TiO2 concentration were studied by examing decolorization rate of methylene blue under visible light. And photocatalytic activity of TiO2 photocatalyst without CuO was also studied as contrast. Methylene blue can be preferably decolorized under alkaline condition. Decolorization rate reaches the best when H2O2 is 10 mL per 1 000 mL methylene blue and photocatalysts dosage is 0. 1 g. TiO2 photocatalyst also can decolorize methylene blue under alkaline condition, but decolorization rate reaches the best when H2O2 iS 12. 5 mL and photocatalyst dosage is 0. 1 g. Contrast experiment under optimum conditions shows that decolorization rate using CuO/TiO2 photocatalyst reaches 88% within 2 h, which is much better than TiO2 and Degussa P25.

关 键 词：可见光 光催化CuO/TiO2 亚甲基蓝 影响因素 

分 类 号：X703[环境科学与工程—环境工程]