An Energy-Efficient Electrochemical Method for CuO-TiO_2 Nanotube Array Preparation with Visible-Light Responses

作     者：Haijin Liu Yingling Wang Guoguang Liu Yuan Ren Nan Zhang Gang Wang Tong Li 

作者机构：School of Environmental ScienceHenan Normal UniversityKey Laboratory for Yellow River and Huaihe River Water Environment and Pollution ControlMinistry of EducationHenan Key Laboratory for Environmental Pollution Control Faculty of Environmental Science and EngineeringGuangdong University of Technology College of Environmental Science and EngineeringSouth China University of Technology 

出 版 物：《Acta Metallurgica Sinica(English Letters)》 (金属学报（英文版）)

年 卷 期：2014年第27卷第1期

页      面：149-155页

核心收录：

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：financially supported by the National Natural Science Foundation of China(No.61173071) the Natural Science Foundation of Henan Province(No.112300413218) the Scientific Research Starting Foundation,Henan Normal University(No.1012) 

主　　题：CuO TiO2 nanotube array Photocatalysis Rhodamine B 

摘      要：A rapid and energy-efficient method was presented for preparing CuO-TiO2 nanotube arrays. TiO2 nanotube arrays were first prepared by anodic oxidation using titanium anode and platinum cathode. Then, the formed TiO2 nanotube arrays and Pt were used as cathode and anode, respectively, for subsequent formation of CuO-TiO2 nanotube arrays, through an electro- chemical process in a solution of 0.1 mol/L CuSO4. The morphology and composition of the CuO-TiO2 nanotube arrays were characterized using field-emission scanning electron microscopy, X-ray photoelectron spectroscopy （XPS）, X-ray diffraction （XRD）, and UV-Vis diffusion reflection spectroscopy （UV-Vis DRS）. XPS and XRD analyses suggested that the Cu element in the nanotubes existed in CuO form, and its content changed along with the voltage during the second electrochemical process. The photocatalytic activities of the CuO-TiO2 nanotube arrays were evaluated by the degradation of a model dye, rhodamine B. The results showed that Cu incorporation aroused wide visible-light adsorption and improved the photocatalytic efficiency of TiO2 nanotube arrays significantly under visible-light irradiation. The stability of the CuO-TiO2 nanotube arrays was also detected.