阴极脱氯协同多孔Ti/BDD电极阳极电催化氧化对氯苯酚  

Electrochemical Oxidation of p-Chlorophenol on Porous Ti/BDD Electrode Cooperated with Cathode Dechlorination

作　　者：陈荣玲 黄卫民[1] 何亚鹏[1] 时军 林海波[1] CHEN Rong-ling;HUANG Wei-min;HE Ya-peng;SHI Jun;LIN Hai-bo(College of Chemistry, Jilin University, Changchun 130012, China)

机构地区：[1]吉林大学化学学院,吉林长春130023

出　　处：《电化学》2018年第2期129-136,共8页Journal of Electrochemistry

基　　金：国家自然科学基金(No.21273097;No.21573093);广东省引进创新创业团队计划项目(No.2013C092);国家重点研发计划(No.2016YFC1102802)资助

摘　　要：本文主要研究阴极脱氯协同阳极(多孔Ti/BDD电极)电催化氧化对于对氯苯酚的电化学降解过程.在有无阳离子交换膜电解槽体系下电化学降解对氯苯酚的实验结果表明,对氯苯酚的矿化主要在阳极区进行;无隔膜电解槽体系下,对氯苯酚在阴极还原形成的氯离子迁移到阳极,在阳极表面进一步生成了具有强催化氧化作用的活性氯,与阳极产生的羟基自由基协同降解对氯苯酚;在阳离子交换膜电解槽体系下,阴极产生的氯离子难以通过阳离子膜迁移至阳极区,无隔膜电解槽呈现出更好的降解效率.结合高效液相色谱技术确定阳极室的中间产物为对苯二酚、邻苯二酚、对苯醌和苯酚等,阴极室的主要产物是苯酚,并根据中间产物提出了对氯苯酚的降解路径.The electrochemical oxidation of p-chlorophenol on porous Ti/BDD electrode cooperated with synergistic effect of cathode dechlorination was studied. Electrochemical degradation tests of p-chlorophenol were conducted in single and double compartment electrolytic cells separately, and the results showed that the mineralization happened mainly in the anode region. The product of chloride ions produced from the cathodic reduction of 4-chlorophenol in the single cell migrated to the anode region and further generated active chlorine toward electro-catalytic oxidation. At the same time, the chloride ion produced from the cathode of the double cell was difficult to be migrated to the anode region, which led to better degradation efficiency in the single compartment electrolytic cell. Combining with high performance liquid chromatography, the intermediate products in the anode region, including benzoquinone, catechol and phenol, were determined, while the major product in the cathode region was phenol. The degradation pathway of p-chlorophenol on BDD electrode was suggested based on the detected intermediate products.

关 键 词：多孔钛 对氯苯酚 脱氯 阴极协同 活性氯 

分 类 号：O646.51[理学—物理化学]