氧化物修饰电极降解有机污染物的电催化特性  

Eletrocatalytic character of oxide modified electrodes in degradation of organic pollutant.

作　　者：赵国华[1] 胡惠康[1] 李楹[1] 高廷耀[2] 

机构地区：[1]同济大学化学系,上海200092 [2]同济大学城市污染控制国家工程中心,上海200092

出　　处：《中国环境科学》2003年第4期385-389,共5页China Environmental Science

基　　金：2001年度教育部留学回国人员科研启动基金项目

摘　　要：采用高温热解氧化沉积法将金属氧化物SnO2, RuO2, Cr2O3, PdO修饰到钛基体表面,制备得到4种金属氧化物修饰电极.比较4种电极氧化降解苯、苯甲酸、苯酚、苯胺、硝基苯以及甲基橙染料6种有机污染物的氧化电流效率,结果表明,电极在各种介质中的析氧电位和氧化反应传递系数(值)是衡量电极能否有效处理有机污染物废水的两个重要指标,其中SnO2电极的析氧电位最高,PbO电极的b值最大,SnO2电极的b 值次之.这为研制和筛选高效催化电极提供了理论依据.Four metal oxide modified electrodes were prepared with adopting pyrolysis oxido-sedimentation method to modify four kinds of metal oxides (SnO2, RnO2, Cr2O3, PdO) on the surface of titanium subtract. Comparing the oxidative current efficiencies of these four electrodes in oxidation degradation of six organic pollutants (benzene, benzoic acid, phenol, aniline, nitrobenzene, methyl orange), the oxygen evolution potential and the transfer coefficient of oxidation reaction ( value) of electrode in various mediums were two important indexes for weighing whether the modified electrode could dispose efficiently the organic pollutant wastewater, in which the oxygen evolution potential of SnO2 electrode was the highest; the value of PdO electrode was the largest and the next was the value of SnO2 electrode. This could provide a theoretical direction basis for preparing and screening highly efficient catalytic electrodes.

关 键 词：金属氧化物修饰电极 电催化氧化 析氧电位 氧化反应传递系数 

分 类 号：X703[环境科学与工程—环境工程]