Pr-PVP掺杂Ti/PbO2电极制备及其在有机物降解中的应用

doi:10.13208/j.electrochem.161048

摘要/Abstract

摘要：

在Ti基体上，采用电沉积法制备了镨和聚乙烯吡咯烷酮(PVP)掺杂的Ti/SnO₂-Sb₂O₃/Pr₂O₃-PVP-PbO₂ 电极. SEM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 测试表明掺杂使可以使电极的表面颗粒变小.循环伏安 (CV)分析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亚甲基蓝(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 电极对亚甲基蓝具有更好的脱色率和 COD 除去率. 降解120min 后，对30 mg·L ^-1 亚甲基蓝的去除率分别可达到99%，对COD去除率为87.9%.

关键词: 二氧化铅, 共掺杂, 降解, 稀土, 电极

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-PbO₂electrode. 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-PbO₂electrode. 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-PbO₂makes it a promising anode for treatment of organic pollutants in aqueous solutions.

Key words: lead dioxide, co-doped, electrode, rare earth, degradation

中图分类号:

O646

徐迈，王凤武，梁铣,魏亦军，方文彦，朱传高，胡云虎. Pr-PVP掺杂Ti/PbO₂电极制备及其在有机物降解中的应用[J]. 电化学（中英文）, 2017, 23(3): 340-346.

XU Mai, WANG Feng-wu, LIANG Xian, WEI Yi-jun, FANG Wen-yan, ZHU Chuan-Gao, HUN Yun-hu. 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.

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链接本文: https://electrochem.xmu.edu.cn/CN/10.13208/j.electrochem.161048

https://electrochem.xmu.edu.cn/CN/Y2017/V23/I3/340

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Pr-PVP掺杂Ti/PbO₂电极制备及其在有机物降解中的应用

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

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