摘要
为获得较高的催化效果,通过在钛网上镀银并在PbO_(2)活性层中掺杂Co元素制备出Ti/Ag-PbO_(2)/Co电极。首先对电极进行表征分析和电化学性能测试,随后对比了不同电极在苯酚去除中的效果。结果表明,镀银处理可以增加PbO_(2)晶体的结晶度和含量,Co掺杂处理可以使PbO_(2)晶体尺寸变小,这些均有利于增强电极的催化活性和使用寿命。当两者共同作用时,电极的电子转移阻力明显减小,电化学性能更强。将其应用于电催化苯酚性能研究,确定了Ti/Ag-PbO_(2)/Co电极在氯化钠添加量2 g/L、电流密度10 mA/cm^(2)、搅拌速度120 r/min下对260 mL初始浓度为100 mg/L的苯酚模拟废水进行催化降解,效果最佳,反应30 min时苯酚去除率为99.8%,能耗仅为1.0 kWh/m^(3)。该电极进行10次重复试验后对苯酚去除率没有明显降低,表明电极具有较高的稳定性。
To achieve an enhanced catalytic performance,a Ti/Ag-PbO_(2)/Co electrode is developed by depositing silver on a titanium mesh and doping cobalt into PbO_(2) active layer.The electrode is firstly characterized and subjected to electrochemical performance testing,followed by a comparison of different electrodes for the removal efficiency of phenol.The results indicate that silver deposition improves the crystallinity and content of PbO_(2) crystal,while cobalt doping contributes to a reduction in crystal size.Both modifications enhance the catalytic activity and longevity of the electrode.As these two factors are combined,the electrode exhibits a significant decrease in electron transfer resistance and an improved electrochemical performance.The performance of the electrode in electrocatalytic phenol degradation is studied,and the optimal reaction conditions for Ti/Ag-PbO_(2)/Co electrode to catalyze phenol degradation are determined as follows:sodium chloride dosage is 2g/L,current density is 10 mA/cm^(2),stirring speed is 120 r/min and the volume of phenol simulated wastewater with an initial concentration of 100 mg/L is 260 mL.Under these conditions,a phenol removal rate of 99.8%is achieved within 30 minutes,with an energy consumption of 1.0 kWh/m^(3) only.The electrode demonstrates high stability,over which phenol removal rate remains stable after ten consecutive tests.
作者
王建彬
卫新来
王磊
WANG Jian-bin;WEI Xin-lai;WANG Lei(School of Biology,Food and Environment,Hefei University,Hefei 230601,China;Anhui Key Laboratory of Sewage Purification and Eco-restoration Materials,Hefei 230088,China;Anhui Provincial Collaborative Innovation Center for Environmental Pollution Prevention and Ecological Restoration,Hefei 230601,China)
出处
《现代化工》
北大核心
2025年第9期106-112,共7页
Modern Chemical Industry
基金
国家重点研发计划(2020YFC1908602)
合肥学院人才科研基金项目(21-22RC31)。
作者简介
王建彬(1998-),男,硕士生,研究方向为水处理技术,1764858200@qq.com;通讯联系人:卫新来(1983-),男,博士,高级实验师,研究方向为膜分离与水处理技术,weixinlai@hfuu.edu.cn。
