摘要
采用电沉积制备中间层,热分解制备表层的方法制备了Ti/SnO2-Sb2O3/SnO2-Sb2O3-CeO2电极。通过SEM,EDX,XRD,降解苯酚测试和析氧电位测定,研究了Ce掺杂对电极的表面形貌、元素组成、结构和催化性能的影响。结果表明,适量的Ce掺杂能提高Ti/Sn-Sb电极的析氧电位,促进对苯酚的催化降解,Sn:Sb:Ce比例为100:10:3降解率达到99.7%,但对COD的去除没有明显的促进作用。同时发现,适量Ce掺杂能细化电极涂层晶粒,增加电极表面积,过量掺杂使SnO2晶格破坏,晶粒变大,性能有所下降。
Ti/SnO2-Sb2O3 and Ti/SnO2-Sb2O3/SnO2-Sb2O3-CeO2 electrodes were prepared by electrodeposition and high temperature oxidation method. The effects of Ce doping content on micrographs and structure of the surface layer, and component element of the surface layer were investigated by SEM, EDX, XRD and test of degradation of phenol and O2 evolution potential. Taking phenol as a model substrate, the electrocatalysis of the prepared electrodes was studied, it was found that O2 evolution potential and degradation rate of phenol could be increased when content of Ce was suitable, and the degradation rate could be as high as 99.7% when atomic ratio of Sn, Sb, Ce was 100： 10： 3, but the degradation efficiency of COD remained no change. Grains could be refined with suitable content of Ce, however, SnO2 crystal lattice was destroyed and the performance of electrode was decreased by excess content of Ce.
出处
《稀有金属》
EI
CAS
CSCD
北大核心
2009年第3期356-360,共5页
Chinese Journal of Rare Metals
关键词
苯酚
降解
铈
电极
phenol
degradation
cerium
electrode
