Effects of Photo Electro Catalytic Conditions on Reduction of Cr(Ⅵ) over TiO2 Nanotube Arrays
作者单位：School of Chemical EngineeringSichuan University
会议名称：《2012年全国冶金物理化学学术会议》
会议日期：2012年
学科分类：07[理学] 070205[理学-凝聚态物理] 08[工学] 080501[工学-材料物理与化学] 0805[工学-材料科学与工程（可授工学、理学学位）] 0702[理学-物理学]
基 金：supported by the National Natural Science Foundation of China(50774053) Support Project of Science and Technology Department Sichuan Province(2009GZ0224)
关 键 词：TiO2 nanotube arrays photo electro catalysis Cr(Ⅵ)reduction Co-degradation
摘 要：Photo electro catalytic reduction of Cr(Ⅵ) in aqueous solution were carried out,using TiO nanotube arrays as a photo *** of initial concentration of Cr(Ⅵ),pH value,applied voltage,dissolved oxygen and co-degradation with methylene blue on catalytic activity were *** light spectrophotometer and atomic absorption spectrometry(AAS) were used to analyze chromium *** was found that with increasing initial concentrations of Cr(Ⅵ),Cr(Ⅵ) reduction rate was decreased. The optimal pH is 2.0,applied voltage was 1.0 *** oxygen showed a slightly negative *** the photo electro catalytic reduction,the product was confirmed as Cr(Ⅲ) in the aqueous solutions by X-ray photoelectron spectroscopy(XPS).For co-degradation of Cr(Ⅵ) and methylene blue,reduction rate of Cr(Ⅵ) was increased significantly as compared to its single reduction by photo electro catalysis.