Sb-SnO2/Ti电极对对硝基苯酚电催化氧化影响因素和机理研究  

THE FACTORS AND MECHANISM OF ELECTRO-CATALYSIS OXIDATION OF P-NITROPHENOL ON Sb-SnO_2/Ti ELECTRODE

作　　者：杨芬[1,2] 甘复兴[2,3] 侯能邦[1] 汪帆[1] 吕泽良[1] 

机构地区：[1]曲靖师范学院化学化工学院,云南曲靖655011 [2]武汉大学资源与环境科学学院环境工程系,湖北武汉430079 [3]中国科学院金属腐蚀与防护国家重点实验室,辽宁沈阳110016

出　　处：《水处理技术》2009年第2期58-61,共4页Technology of Water Treatment

基　　金：云南省科技厅资助项目(2008);曲靖市科技局基金资助项目(5322091029);云南省科技厅资助项目(2006B0081M)

摘　　要：以自制掺锑二氧化锡涂层电极为阳极,钛板为阴极,进行了对硝基苯酚溶液的电催化氧化降解试验。系统研究了pH、溶液温度、对硝基苯酚初始浓度、电解质浓度、电流密度等因素对电催化氧化降解效果的影响,并对氧化降解历程进行了讨论。结果表明,pH为3、温度为30℃、电流密度为20mA·cm-2、Na2SO4电解质浓度为0.2mo·lL-1时,对硝基苯酚去除率和TOC的去除率都较高;对硝基苯酚的电催化氧化反应属于电化学燃烧过程。The degradation efficiency of electro-catalysis oxidation of PNP in the electrolysis system was studied by using the excellent Sb-SnO2/Ti nano-coating electrode as anode and the titanium plate as cathode. The factors such as pH value, initial PNP concentration, solution temperature, electrolyte concentration and current density, are systematically researched in the process of p-nitrophenol degradation. Results demonstrated that：the optimum test conditions, pH was 3, solution temperature was 30℃ ,electrolyte concentration was 20 rnA. cma, and the electrolyte concentration of Na2SO4 was 0.2 mol· L^-1 In this situation the removal rate ofp-nitrophenol and TOC is very high. The electrocatalytic oxidation ofp-nitrophenol belongs to electrochemistry combustion process.

关 键 词：Sb-SnO2/Ti涂层电极 对硝基苯酚 电催化氧化 

分 类 号：TQ031.7[化学工程]