标题：Cobalt Oxide Modified Highly Ordered TiO_2 Nanotube Arrays: Enhanced Visible Light Photoelectrochemical Properties
作者：Chunlan Cao;Chenguo Hu;Weidong Shen;Shuxia Wang;Hong Liu;Jianli Wang
作者机构：[Cao, C] Department of Applied Physics, Chongqing University, Chongqing 400044, China, Key Laboratory of Special Power Supply, Chongqing Communication 更多
通讯作者地址：[Hu, CG]Chongqing Univ, Dept Appl Phys, Chongqing 400044, Peoples R China.
来源：Science of advanced materials
关键词：Titania Nanotube Arrays;Cobalt Oxide;Modified;Photoelectrochemical Property
摘要：Highly aligned TiO_2 nanotube arrays (NTs) modified by cobalt oxide nanoparticles were prepared by one-step electrochemical anodization of Ti foil using Co(NO_3)_2 ? 6H_2O as cobalt source and subsequent thermal treatment in air at 450 ℃ for 2 h. Their morphology, structure and optical properties were investigated by field emission scanning electron microscope, energy dispersion spectroscopy, X-ray diffraction, X-ray photoelectron spectroscopy and UV-visible reflectance spectroscopy. The photoelectrochemical properties were investigated by the photocurrent response under the irradiation of the simulated sunlight at room temperature. The results showed that the photocurrent response of the TiO_2 NTs modified by cobalt oxide is higher than that of the unmodified TiO_2 NTs, which may be ascribed to faster electron transport and more efficient separation of the photogenerated holes and electrons in the cobalt oxide anchored TiO_2 NTs. The results presented here demonstrate that the TiO_2 NTs modified by cobalt oxide might have an important application in solar cells or photocatalysis owing to its efficient utilization of visible light.