Preparations and Characterizations of Ti/PbO₂ Electrodes Modified with Rare Earth of Praseodymium and PVP in Electrochemical Degradation of Organics

Authors

Mai XU, School of Chemistry and Material Engineering; Huainan Normal University; Huainan, Anhui 232038, P. R. China;
Feng-wu WANG, School of Chemistry and Material Engineering; Huainan Normal University; Huainan, Anhui 232038, P. R. China;Follow
Xian LIANG, School of Chemistry and Material Engineering; Huainan Normal University; Huainan, Anhui 232038, P. R. China;
Yi-jun WEI, School of Chemistry and Material Engineering; Huainan Normal University; Huainan, Anhui 232038, P. R. China;
Wen-yan FANG, School of Chemistry and Material Engineering; Huainan Normal University; Huainan, Anhui 232038, P. R. China;
Chuan-Gao ZHU, School of Chemistry and Material Engineering; Huainan Normal University; Huainan, Anhui 232038, P. R. China;
Yun-hu HUN, School of Chemistry and Material Engineering; Huainan Normal University; Huainan, Anhui 232038, P. R. China;

Corresponding Author

Feng-wu WANG(fengwuwang@163.com)

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 wastewater 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.

Graphical Abstract

Keywords

lead dioxide, co-doped, electrode, rare earth, degradation

DOI Link

https://doi.org/10.13208/j.electrochem.161048

Publication Date

2017-06-29

Online Available Date

2017-05-19

Revised Date

2017-05-17

Received Date

2016-11-02

Recommended Citation

Mai XU, Feng-wu WANG, Xian LIANG, Yi-jun WEI, Wen-yan FANG, Chuan-Gao ZHU, Yun-hu HUN. Preparations and Characterizations of Ti/PbO₂ Electrodes Modified with Rare Earth of Praseodymium and PVP in Electrochemical Degradation of Organics[J]. Journal of Electrochemistry, 2017 , 23(3): 340-346.
DOI: 10.13208/j.electrochem.161048
Available at: https://jelectrochem.xmu.edu.cn/journal/vol23/iss3/11