苯胺在SnO_2/Ti电极上的电化学氧化  

Electrochemical Oxidation for the Degradation of Aniline on the SnO_2/Ti Anode

作　　者：王玉玲[1] 蔡乃才[1] 霍耀东[1] 陈浩[1] 

机构地区：[1]武汉大学化学与环境科学学院,武汉430072

出　　处：《物理化学学报》2001年第7期609-613,共5页Acta Physico-Chimica Sinica

基　　金：国家自然科学基金资助项目(10971023)

摘　　要：研究了以SnO_2/Ti为阳极降解苯胺的电化学降解特性.实验结果表明,同Pt电极比较,掺F的SnO_2/Ti电极对苯胺的降解表现了明显的效果.苯胺在SnO_2/Ti电极上氧化降解速率主要决定于其中间产物的阳极溶解行为.由中间产物构成的有机膜的阳极溶解是反应的慢步骤.研究了苯胺溶液的浓度、pH和电流密度对苯胺降解速率的影响规律,对反应中间产物的复杂性及构成“膜”的理化性质进行了初步分析.The characteristic of electrochemical degradation of aniline on SnO2/Ti anode have been studied. The results indicate that SnO2/Ti anode doped with F plays an obvious role of electrocatalysis on the degradation of aniline different from that on Pt anode. The kinetics factors that influent the oxidation rates of aniline on SnO2/Ti anode are determined by the dissolving of intermediate products on anodes. The dissolving of the organic film with intermediate products on the anode is the rate determining step. The effects of aniline concentration, pH of aniline solution and the current density on the rate of aniline degradation has been studied. Under the best condition, the most efficient rate of elimination of aniline(99.1%) and current efficiency (99.8%) could be achieved. The complexity of the intermediate products, the basic category of the intermediate products consiste of the black film have been analyzed.

关 键 词：电化学降解 苯胺 有机污染物处理 电催化 电化学氧化 二氧化锡/钛电极 

分 类 号：O646[理学—物理化学]