Ti/TiO2纳米管阵列/PbO2-Pr电极制备及在电氧化有机废水中应用

doi:10.11944/j.issn.1000-0518.2018.05.170238

摘要/Abstract

摘要：

以二氧化钛纳米管阵列(TiO₂NTs)为基体,利用脉冲电沉积的方法将Pr掺杂的PbO₂修饰到TiO₂NTs管中,制备出新型电极材料Ti/TiO₂NTs/nanoPbO₂-Pr用来降解有机废水。通过循环伏安测试(CV)和线性伏安法(LSV)等手段对电极性能进行评估,研究表明,新型电极材料Ti/TiO₂NTs/nanoPbO₂-Pr具有高的电催化活性。利用扫描电子显微镜(SEM)、X射线衍射仪(XRD)、X射线光电子能谱(XPS)等对其进行表面形貌、晶形结构和元素组成进行研究。结果表明,通过脉冲电沉积成功将Pr-PbO₂沉积到TiO₂纳米管中,其中元素Pr是以Pr₂O₃形式存在。亚甲基蓝降解实验证明, Ti/TiO₂NTs/nanoPbO₂-Pr电极降解120 min后亚甲基蓝的去除率高达99.8%。

关键词: 二氧化钛纳米管阵列, 脉冲电沉积, 二氧化铅电极, 电氧化

Abstract:

A novel Ti/TiO₂ nanotube arrays(NTs)/PbO₂-Pr electrode for the degradation of organic wastewater was fabricated by the pulse electrodeposition method. Pr-doped PbO₂ nanoparticles were deposited on the TiO₂ nanotube array substrate. Cyclic voltammetry(CV) and linear sweep voltammetry(LSV) were utilized to study the electrochemical performance of electrodes. The results demonstrate that Ti/TiO₂NTs/nanoPbO₂-Pr electrodes(P) possess excellent electrocatalytic properties. The morphology, crystallinity and elemental composition of Ti/TiO₂NTs/nanoPbO₂-Pr electrodes were characterized by scanning electron microscopy(SEM), X-ray diffraction(XRD), X-ray photoelectron spectroscopy(XPS). The β-PbO₂ nanoparticles are dispersed inside the TiO₂ nanotubes and the doped Pr exists in the form of Pr₂O₃. The degradation of methylene blue was carried out to test electrocatalytic performance of this novel electrode. A 99.8% removal of methylene blue of Ti/TiO₂NTs/nanoPbO₂-Pr electrode within 120 min indicates its good activity.

Key words: TiO₂ nanotube array, pulse electrodeposition, lead dioxide electrode, electrooxidation

毛雨路, 张西, 徐迈, 王凤武, 王智成, 方文彦, 魏亦军, 朱传高. Ti/TiO₂纳米管阵列/PbO₂-Pr电极制备及在电氧化有机废水中应用[J]. 应用化学, 2018, 35(5): 582-588.

MAO Yulu, ZHANG Xi, XU Mai, WANG Fengwu, WANG Zhicheng, FANG Wenyan, WEI Yijun, ZHU Chuangao. Preparation of Ti/TiO₂ Nanotube Arrays/PbO₂-Pr Electrode and Its Application in Electrocatalytic Degradation of Organic Wastewater[J]. Chinese Journal of Applied Chemistry, 2018, 35(5): 582-588.

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Ti/TiO₂纳米管阵列/PbO₂-Pr电极制备及在电氧化有机废水中应用

Preparation of Ti/TiO₂ Nanotube Arrays/PbO₂-Pr Electrode and Its Application in Electrocatalytic Degradation of Organic Wastewater

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