La掺杂钛基氧化物电极降解水中2,4-二氯酚的研究  

Degradation of 2,4-Dichlorophenol by Ti-based Oxide Electrodes Doped with La

作　　者：陈阳雯 刘蕊 姚洁 袁兴程[1] CHEN Yangwen, LIU Rui, YAO Jie, YUAN Xingcheng(School of Chemistry and Chemical Engineering, Jiangsu Normal University, Xuzhou 221116, Chin)

机构地区：[1]江苏师范大学化学化工学院,江苏徐州221116

出　　处：《环境科学与技术》2018年第1期94-98,共5页Environmental Science & Technology

基　　金：江苏省高校自然科学基金(15KJD610003);江苏师范大学博士启动基金(13XLR025)

摘　　要：以稀土La掺杂的钛基氧化物(Ti/SnO_2+Sb_2O_3/PbO_2)为阳极,不锈钢板为阴极,Na_2SO_4作支持电解质,降解水中2,4-DCP。研究了pH大小,电流密度,电解质浓度,La掺杂量以及电化学反应时间对2,4-DCP降解的影响,确定了最佳的处理条件。研究结果表明:La掺杂钛基氧化物电极对水中的2,4-DCP有良好的降解效果;在中性的条件下,降解效果较好;电流越大,降解率越高;电解质的浓度对降解率影响较小;适量掺杂La可有效提高2,4-DCP的降解率。Ti-based oxide electrodes doped with La was used to degrade 2, 4-DCP in wastewater, in which Na_2SO_4 was used as supporting electrolyte. The effects of pH, current density, electrolyte concentration, La doping and electrochemical reaction time on the degradation of 2, 4-DCP were studied, and the optimum processing conditions were determined. The results show that Ti-based oxide electrodes with La-doping had good degradation effect on 2, 4-DCP. The degradation rate was better under pH 5-7, and the greater the current was, the higher the degradation rate was. The degradation rate was less affected by the electrolyte concentration. The right amount of La-doping could effectively improve the degradation rate of 4-DCP.

关 键 词：LA掺杂 钛基氧化物电极 2 4-二氯酚 电解 

分 类 号：X703.1[环境科学与工程—环境工程]