Ti/TiO_2纳米管阵列/PbO_2-Pr电极制备及在电氧化有机废水中应用

以二氧化钛纳米管阵列(TiO_2NTs)为基体,利用脉冲电沉积的方法将Pr掺杂的PbO_2修饰到TiO_2NTs管中,制备出新型电极材料Ti/TiO_2NTs/nanoPbO_2-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/TiO_2NTs/nanoPbO_2-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-PbO_2沉积到TiO_2纳米管中,其中元素Pr是以Pr_2O_3形式存在。亚甲基蓝降解实验证明,Ti/TiO_2NTs/nanoPbO_2-Pr电极降解120min后亚甲基蓝的去除率高达99.8%。

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

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.