摘要
为提高PbO_(2)电极的电催化活性,采用电沉积法制备金属铜离子(Cu^(2+))和十六烷基三甲基溴化铵(CTAB)共掺杂改性的Ti/PbO_(2)-CTAB-Cu电极,采用扫描电子显微镜(SEM)、能量色散X射线光谱仪(EDX)和X射线衍射仪(XRD)表征了电极的表面形貌和晶体结构,采用线性扫描伏安法(LSV)和电化学阻抗谱(EIS)表征了电极的电化学性能,分析了改性前后PbO_(2)电极的表面性质、电化学性能和羟基自由基产生能力,并对其电催化降解亚甲基蓝(MB)模拟印染废水的降解效果进行了研究。结果表明:与Ti/PbO_(2)、Ti/PbO_(2)-CTAB、Ti/PbO_(2)-Cu电极相比,共掺杂改性后的Ti/PbO_(2)-CTAB-Cu电极具有更小的晶粒尺寸、更紧凑均匀的表面结构、更高的析氧电位、更低的界面转移电阻、更高的羟基自由基产生能力、更长的使用寿命以及更高的MB去除率和COD去除率,且在多次循环使用中不会造成电极中重金属离子的过量析出。
In order to improve the electrocatalytic activity of the PbO_(2) electrode,this paper applies electrodeposition to preparing a Ti/PbO_(2)-CTAB-Cu electrode co-doped with copper ions(Cu^(2+))and Hexadecyl trimethyl ammonium Bromide(CTAB).The paper applies electron microscopy(SEM),energy dispersive X-ray spectroscopy(EDX)and X-ray diffraction(XRD)to characterizing the surface morphology and crystal structure of the electrode.Linear sweep voltammetry(LSV)and electrochemical impedance(EIS)cha-racterize the electrochemical performance of the electrode.And then the paper analyzes the surface activity,electrochemical performance and hydroxyl radical production capacity of the PbO_(2) electrode before and after the modification,and simulates the electrocatalytic degradation of methylene blue(MB)to study the degradation effect of printing and dyeing wastewater.The results show that compared with Ti/PbO_(2),Ti/PbO_(2)-CTAB,Ti/PbO_(2)-Cu electrodes,the co-doped modified Ti/PbO_(2)-CTAB-Cu electrode has smaller crystal particles,more compact and uniform structure,higher oxygen evolution potential,lower interface transfer resistance,higher hydroxyl radical generation capacity,longer electrode life,and better MB removal rate and COD removal rate,and it will not cause excessive precipitation of heavy metal ions in the electrode during multiple cycles of use.
作者
黄钊杰
潘湛昌
许燕滨
周秋曼
吴建
HUANG Zhaojie;PAN Zhanchang;XU Yanbin;ZHOU Qiuman;WU Jian(School of Chemical Engineering and Light Industry,Guangdong University of Technology,Guangzhou 510006,China)
出处
《安全与环境工程》
CAS
CSCD
北大核心
2021年第6期188-194,共7页
Safety and Environmental Engineering
基金
广东省科技计划项目(2016B020240003)。
关键词
共掺杂改性PbO_(2)电极
电化学性能
电催化降解
co-doped modified PbO_(2)electrode
electrochemical performance
electrocatalytic degradation
作者简介
黄钊杰(1993-),男,硕士研究生,主要研究方向为水污染控制,E-mail:hzj4178@163.com;通讯作者:潘湛昌(1962-),男,教授,主要从事水污染控制方面的研究,E-mail:panzhanchang@163.com。
