TiO_2镀膜电极光电催化降解酸性紫红  

Photoelectrocatalysis and degradation of Tracid Bordeaux by TiO_2 film coating electrode

作　　者：周思佳[1] 邹华[1] 戴琳[1] 

机构地区：[1]江南大学环境与土木工程学院,无锡214122

出　　处：《环境工程学报》2013年第1期103-107,共5页Chinese Journal of Environmental Engineering

基　　金：国家自然科学基金资助项目(20707007)

摘　　要：采用溶胶-凝胶法在钛片上涂覆TiO2薄膜为电极,自行设计组装光电催化反应器,对酸性紫红染料废水进行光电脱色处理,探讨了光电反应的协同性并研究了初始染料浓度、电压、pH和电解质浓度对脱色反应的影响。结果表明,光化学催化和电化学氧化具有协同效应,单一紫外光催化和单一电催化酸性紫红的脱色率分别为44.27%和13.12%,而光电催化(紫外、外加电压10 V)的脱色率达到77.18%。初始浓度较低、电压适中、pH偏碱性时,酸性紫红废水脱色率较高;电解质对脱色反应有促进作用,且浓度越高,酸性紫红脱色率越高。Photoelectrocatalysis reactor was designed and assembled to treat Tracid Bordeaux wastewater, titanium plate coated with TiO2 thin film by sol-gel method was used as electrodes. The synergy of photo-electric reaction and the effects of initial dyes concentration, voltage, pH and electrolyte concentration on decoloration were discussed. The result shows that photochemical catalysis and electrochemical oxidation have cooperative effects. The decoloring rates of ultraviolet light catalysis and electro-catalysis to tracid bordeaux were 44.27% and 13.12% , respectively. However, the decoloring rate of photoelectrocatalysis （ultraviolet light plus voltage of 10 V） reached as high as 77. 18%. The low initial concentration, moderate voltage and alkaline pH led to high- er decoloring rate of tracid bordeaux wastewater. The electrolyte was beneficial to decoloration. The higher the e- lectrolyte concentration was, the higher decoloring rate would be.

关 键 词：TIO2 镀膜 酸性紫红 光电催化 

分 类 号：X703[环境科学与工程—环境工程]