乙腈-水相1,4-二氯苯在铂电极上的电氧化行为  

Electrochemical oxidation behavior of 1,4-dichlorobenzene on platinum electrodes in acetonitrile-aqueous solution

作　　者：刘奇[1] 王家德[1] 刘臣亮[1] 陈建孟[1] 

机构地区：[1]浙江工业大学环境工程研究中心,浙江杭州310032

出　　处：《化工学报》2009年第2期471-475,共5页CIESC Journal

基　　金：教育部科学技术研究重点项目(208055)~~

摘　　要：The mechanism and characteristics of electrochemical oxidation of 1,4-dichlorobenzen in simulated wastewater were investigated on a platinum electrode.The cyclic voltammetric profiles showed that the oxidation peak potential and current density increased with the increase of the concentration of 1,4-dichlorobenzene,nevertheless,the oxidation potential of 1,4-dichlorobenzene in acetonitrile-aqueous solution was smaller than that in acetonitrile solution.Chronoamperometric experimental results suggested that the 1,4-dichlorobenzene degradation included both direct electro-oxidation of 1,4-dichlorobenzene by loss of electrons and indirect oxidation with anodically formed free radicals.Additionally,parachlorophenol,1,4-benzoquinone,maleic acid,oxalic acid,acetic acid,and formic acid were identified as main electro-oxidation products by ion chromatography or high performance liquid chromatography.Moreover,a yellow polymer film,which influenced the electrochemical oxidation process,was clearly identified as a rough surface after electrochemical reaction in comparison to a smooth and glossy surface of platinum electrodes without polymer film as observed from SEM image.The mechanism and characteristics of electrochemical oxidation of 1, 4-dichlorobenzen in simulated wastewater were investigated on a platinum electrode. The cyclic voltammetric profiles showed that the oxidation peak potential and current density increased with the increase of the concentration of 1,4-dichlorobenzene, nevertheless, the oxidation potential of 1,4-dichlorobenzene in acetonitrile-aqueous solution was smaller than that in acetonitrile solution. Chronoamperometric experimental results suggested that the 1,4-dichlorohenzene degradation included both direct electro-oxidation of 1,4-dichlorohenzene by loss of electrons and indirect oxidation with anodically formed free radicals. Additionally, parachlorophenol, 1,4-benzoquinone, maleic acid, oxalic acid, acetic acid, and formic acid were identified as main electro-oxidation products by ion chromatography or high performance liquid chromatography. Moreover, a yellow polymer film, which influenced the electrochemical oxidation process, was clearly identified as a rough surface after electrochemical reaction in comparison to a smooth and glossy surface of platinum electrodes without polymer film as observed from SEM image.

关 键 词：乙腈-水相1 4-二氯苯在铂电极上的电氧化行为 

分 类 号：O646[理学—物理化学]