【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/SnO₂-Sb₂O₃/Pr₂O₃-PVP-PbO₂电极.SEM测试显示,Ti/SnO₂-Sb₂O₃/Pr₂O₃-PVP-PbO₂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/SnO₂-Sb₂O₃/Pr₂O₃-PVP-PbO₂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/PbO₂电极相比,Ti/SnO₂-Sb₂O₃/Pr₂O₃-PVP-PbO₂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%.更多还原

【Abstract】 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.更多还原