Sb、Ce共掺杂SnO_2/C/Ti电极对含酚废水的电催化性能研究  

Study on the electrocatalytic properties of Sb,Ce co-doped SnO_2/C/Ti electrode in phenolic wastewater

作　　者：宋力[1,2] 朱建君[1] 刘茜 王博[4] 刘培芳[1] 张克立[2] 

机构地区：[1]信阳师范学院化学化工学院,河南信阳464000 [2]武汉大学化学与分子科学学院,湖北武汉430072 [3]广东环境保护工程职业学院环境工程与土木工程系,广东佛山528216 [4]陕西科技大学机电工程学院,陕西西安710021

出　　处：《环境污染与防治》2012年第8期15-20,共6页Environmental Pollution & Control

基　　金：国家自然科学基金资助项目(No.20071026)

摘　　要：采用溶胶-凝胶法合成Sb、Ce共掺杂SnO2/C/Ti电极,经XC-72R炭黑吸附后得到钛基炭载金属氧化物SnO2-Sb(2.5%(质量分数,下同))-Ce(2.5%)/C/Ti电极,利用电化学交流阻抗法(EIS)测试电极的交流阻抗值随电位和不同浓度苯酚的变化情况。结果表明,在不同电位(0.10、0.95、1.01V)时,SnO2-Sb(2.5%)-Ce(2.5%)/C/Ti电极的膜电阻、电化学电阻、总电阻和苯酚氧化阻力随着电位的增加而减小;此外,在恒电位(0.95V)、不同质量浓度(100、200、300mg/L)苯酚溶液的条件下,电极的膜电阻、电化学电阻、总电阻和苯酚氧化阻力随着苯酚浓度的增加而增大。电极在反应过程中表现良好的活性,对苯酚的催化氧化较彻底。Carbon supported oxide composite electrocatalysts SnO2-Sb（2.5%）-Ce（2.5%）/C/Ti were prepared through the absorption of XC-72 carbon on Sb,Ce co-doped SnO2/C/Ti which were obtained by sol-gel method. The changes of impedance values of Sb,Ce co-doped SnO2/C/Ti electrodes under the different potential and phenol concentration were measured by electrochemical impedance spectroscopy （EIS）. The results shows that under different potentials （0.10,0.95,1.01 V）, the membrane resistance, electrochemistry resistance, total resistance and the resistance of phenol oxidizing of SnO2-Sb（2.5 %）-Ce（2.5% ）/C/Ti electrode decreases as potential increases. Moreover, under the constant potentials （0.95 V） ,the membrane resistance,electrochemistry resistance,total resistance and the resistance of phenol oxidizing of SnO2-Sb（2.5 %）-Ce（2.5 %）/C/Ti electrode increases as the concentration of phenol increases. During the reaction,electrodes show a high activity to electrocatalytic oxidation of phenol.

关 键 词：掺杂电极 溶胶-凝胶法 苯酚 电化学交流阻抗法 

分 类 号：X703[环境科学与工程—环境工程]