自制气体扩散电极用于染料废水处理的研究  

Self-made gas diffusion electrode for dye wastewater treatment

作　　者：李善评[1] 曾雪媛[1] 连军锋[1] 王洪波[1] 方洪琛[1] 

机构地区：[1]山东省水环境污染控制与资源化重点实验室,山东大学环境科学与工程学院,山东济南250100

出　　处：《环境污染与防治》2011年第4期11-15,共5页Environmental Pollution & Control

基　　金：国家“十一五”科技支撑计划项目(No.2006BAJ05A12)

摘　　要：研究了气体扩散电极用于难降解活性艳红X-3B染料废水的处理,优化了催化剂LaNiO3和气体扩散电极的制备工艺。采用凝胶-溶胶法制备催化剂LaNiO3,其最佳制备工艺为:柠檬酸与金属离子摩尔比1.5∶1.0,pH 9,焙烧温度750℃;气体扩散电极的最佳制备工艺为:催化剂用量0.6 g,造孔剂用量0.6 g,聚四氟乙烯(PTFE)用量3.0 g,焙烧温度300℃。采用X射线衍射(XRD)、电子扫描显微镜(SEM)等检测分析方法对所制备的催化剂和气体扩散电极进行表征和分析。结果表明,新型气体扩散电极具有良好的电催化性能。Electrocatalytic degradation of refractory reactive brilliant red X-3B wastewater was performed in self-made gas diffusion electrode with LaNiO3 as catalyst.XRD and SEM were applied for the characterization and analysis of catalyst and electrode.The catalysts were prepared by sol-gel method,effect of citric acid dosage,pH,and backing temperature on catalytic performance was investigated and the optimal preparation processes were determined as follow： mole ratio of citric acid to metal ions was 1.5∶1.0,pH was 9 and baking temperature was 750 ℃.Applying 0.6 g of catalyst,0.6 g of pore-forming agent,3.0 g of PTFE baking at 300 ℃ for 2 h,the obtained electrode presented best electro-catalytic property.All of these results indicated that the novel gas diffusion electrode could be used for electrochemical treatment of refractory organic wastewater.

关 键 词：电化学处理 气体扩散阴极 难降解有机废水 催化剂 

分 类 号：X703[环境科学与工程—环境工程]