摘要
采用聚合物前驱体法制备了Ti/SnO2-Sb2O3电极,再通过恒电流电沉积法制备了Ti/SnO2-Sb2O3/PbO2和Ti/SnO2-Sb2O3/MnO2电极。采用SEM技术对3种金属氧化物电极表面的形貌进行了表征,并分别以3种电极为阳极进行了苯酚的电催化氧化实验。实验结果表明:电解时间为2.5 h时,Ti/SnO2-Sb2O3电极、Ti/SnO2-Sb2O3/PbO2电极和Ti/SnO2-Sb2O3/MnO2电极对苯酚的降解率分别为85.9%,83.2%,44.6%;苯酚在3种电极上的电催化氧化反应均遵循一级反应动力学方程;苯酚在Ti/SnO2-Sb2O3电极和Ti/SnO2-Sb2O3/PbO2电极上的反应速率较快,并具有较高的析氧电位;Ti/SnO2-Sb2O3/PbO2电极具有更好的耐腐蚀性和更长的使用寿命。
The Ti/SnO2-Sb2O3 electrode was prepared by polymeric precursor process. The Ti/SnO2-Sb2O3/PbO2 and Ti/SnO2-Sb2O3/MnO2 electrodes were prepared by constant current electrodip process. The 3 metal oxide electrodes were characterized by SEM. And the experiments on electro-catalytic oxidation of phenol were carried out using the 3 electrodes as anodes. The experimental results show that：When the electrolysis time is 2.5 h,the degradation rates of phenol on the Ti/SnO2-Sb2O3,Ti/SnO2-Sb2O3/PbO2 and Ti/SnO2-Sb2O3/MnO2 electrodes are 85.9%,83.2%,44.6%,respectively;The electro-catalytic oxidation of phenol on the 3 electrodes all accord with the first-order kinetics equation;Ti/SnO2-Sb2O3 and Ti/SnO2-Sb2O3/PbO2 electrodes has faster reaction rate and higher potential of oxygen evolution;The Ti/SnO2-Sb2O3/PbO2 electrode has better corrosion resistance and longer service life.
出处
《化工环保》
CAS
CSCD
北大核心
2014年第1期84-89,共6页
Environmental Protection of Chemical Industry
基金
中南大学中央高校基本科研专项资金项目(201322 ts016)
关键词
钛基金属氧化物
电极
苯酚降解
Ti-based metal oxide electrode phenol degradation
