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

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％.%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/TiO2 NTs/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.