Pr-PVP掺杂Ti/PbO_2电极制备及其在有机物降解中的应用  

Preparations and Characterizations of Ti/PbO_2 Electrodes Modified with Rare Earth of Praseodymium and PVP in Electrochemical Degradation of Organics

作　　者：徐迈[1] 王凤武[1] 梁铣[1] 魏亦军[1] 方文彦[1] 朱传高[1] 胡云虎[1] XU Mai WANG Feng-wu LIANG Xian WEI Yi-jun FANG Wen-yan ZHU Chuan-gao HUN Yun-hu(School of Chemistry and Material Engineering, Huainan Normal University,Huainan, 232038, Anhui, P. R. China)

机构地区：[1]淮南师范学院化学与材料工程学院,安徽淮南232038

出　　处：《电化学》2017年第3期340-346,共7页Journal of Electrochemistry

基　　金：国家自然科学基金项目(No.21176099);安徽省高校自然科学重点研究项目(No.KJ2016A670);安徽省高校自然科学研究重大项目(No.KJ2017ZD37)资助

摘　　要：在Ti基体上,采用电沉积法制备了镨(Pr)和聚乙烯吡咯烷酮(PVP)掺杂的Ti/SnO_2-Sb_2O_3/Pr_2O_3-PVP-PbO_2电极.SEM测试显示,Ti/SnO_2-Sb_2O_3/Pr_2O_3-PVP-PbO_2电极表面颗粒细化,镀层结构更加致密和均匀.XRD分析说明掺杂可以使电极的表面颗粒变小.循环伏安(CV)测试表明,共掺杂改性后的电极电催化活性明显提高.强化寿命测试显示Ti/SnO_2-Sb_2O_3/Pr_2O_3-PVP-PbO_2电极稳定性更好,使用寿命更长.将所制备的电极应用于甲基蓝(MB)模拟染料废水的降解测试,与常规的Ti/PbO_2电极相比,Ti/SnO_2-Sb_2O_3/Pr_2O_3-PVP-PbO_2电极对甲基蓝具有更好的脱色率和COD除去率.降解120 min后,对30 mg·L^(-1)甲基蓝的去除率可达99%,对COD去除率为87.9%.The titanium （Ti） based lead oxide （PbO2） electrodes doped with praseodymium oxide （Pr2O3） and polyvinylpyrrolidone （PVP） were prepared by electrodeposition. The surface morphologies and structures of the as-prepared thin films were characterized by scanning electron microscopy （SEM） and X-ray diffraction （XRD） technique, respectively. The results showed that the denser and more uniform coatings with smaller particles and larger surfaces were obtained by doping, which modified the micro-structure of the Ti/SnO2-Sb2O3/Pr2O3-PVP-PbO2 electrode. Cyclic voltammetry （CV） was also used to study the electrocatalytic activity of electrodes and higher oxidation capacity was obtained with the Ti/SnO2-Sb2O3/Pr2O3-PVP-PbO2 electrode. The accelerated life of Ti/SnO2-Sb2O3/Pr2O3-PVP-PbO2 electrode was considerably longer than that of undoped anode. Compared with conventional Ti/PbO2 electrodes, the Ti/SnO2-Sb2O3/Pr2O3-PVP-PbO2 electrodes exhibited higher decolorization rate and removal rate of COD, reaching 99% and 87.9%, respectively, after the electrolysis time of 120 min during the process of degrading simulative dyeing waste water of methylene blue. The good electrocatalytic performance of Ti/SnO2-Sb2O3/Pr2O3-PVP-PbO2 makes it a promising anode for treatment of organic pollutants in aqueous solutions.

关 键 词：二氧化铅 共掺杂 降解 稀土 电极 

分 类 号：O646.54[理学—物理化学] X703[理学—化学]