A simple electrochemical oxidation method to prepare highly ordered Cr-doped titania nanotube arrays with promoted photoelectrochemical property

作者：Gong Jianyu; Pu Wenhong^*; Yang Changzhu; Zhang Jingdong

来源：Electrochimica Acta, 2012, 68: 178-183.

DOI：10.1016/j.electacta.2012.02.049

• TiO2 nanotube arrays
• Cr doping
• Glycerol/fluoride electrolyte
• Photoelectrocatalysis

Highly ordered Cr-doped TiO2 nanotube arrays (Cr-TiO2NTs) were prepared by the electrochemical oxidation of Ti substrate in glycerol/Fluoride electrolyte solution containing potassium dichromate. The Cr-TiO2NTs were characterized with scanning electron microscopy (SEM), X-ray diffraction (XRD) and X-ray photoelectron spectroscopy (XPS). The results indicated that Cr3+ was successfully introduced into TiO2 nanotubes and Cr doping inhibited the crystal phase change of TiO2 from anatase to rutile under high annealing temperature. Compared with pure TiO2NTs, the Cr-doped TiO2NTs exhibited higher photocurrent response, which was influenced by the concentration of Cr(VI) dopant and annealing temperature. The efficient removal of methyl orange (MO) indicated the high photoelectrocatalytic (PEC) activity of Cr-TiO2NTs.

• 出版日期2012-4-30
• 单位华中科技大学