Electrocatalytic degradation of methylene blue on Co doped Ti/TiO₂ nanotube/PbO₂ anodes prepared by pulse electrodeposition

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• 作者：Canyong Wang^a ; Fengwu Wang^b ; ^{fengwuwang@163.com" class="auth_mail" title="E-mail the corresponding author} ; Mai Xu^b ; ChuanGao Zhu^b ; Wenyan Fang^b ; Yijun Wei^b
• 关键词：Electrocatalytic degradation ; Pulse electrodeposition ; Methylene blue ; TiO2-NTs/Co-PbO2 electrodes ; Electrochemical property
• 刊名：Journal of Electroanalytical Chemistry
• 出版年：2015
• 出版时间：15 December 2015
• 年：2015
• 卷：759
• 期：part_P2
• 页码：158-166
• 全文大小：1896 K

文摘

Co doped Ti/TiO₂ nanotube/PbO₂ (TiO₂-NTs/Co-PbO₂) was prepared by a pulse electrodeposition technique for methylene blue (MB) degradation. The TiO₂-NTs/Co-PbO₂ electrode was characterized by scanning electron microscopy (SEM), X-ray photoelectron spectroscopy (XPS) and X-ray diffraction (XRD). The results indicated that TiO₂-NTs/Co-PbO₂ electrodes (P) prepared by the pulse electrodeposition technique possess a more compact structure and finer grain size than TiO₂-NTs/Co-PbO₂ electrodes (D) prepared by direct electrodeposition. The electrochemical properties of electrodes were studied by steady-state polarization curves, cyclic voltammetry (CV) and eletrochemical impendence spectroscopy (EIS). The electrochemical measurements also demonstrate that TiO₂-NTs/Co-PbO₂ electrodes (P) have more excellent direct electrochemical oxidation performance. The electrocatalytic property of TiO₂-NTs/Co-PbO₂ electrodes was also examined for the electrochemical oxidation of methylene blue (MB). Bulk electrolysis showed that the methylene blue (MB) and chemical oxygen demand (COD) removal efficiency of TiO₂-NTs/Co-PbO₂ electrodes (P) reach 100% and 74.0% respectively after 120 min. The experimental results demonstrate that the TiO₂-NTs/Co-PbO₂ electrode (P) is a promising material for the treatment of organic pollutants.