Hydrogen Treated TiO2 Nanotube/Ti Photoanode and Its Photospliting Water Property

作者：Li Guangzhong; Tang Huiping^*; Zhang Wenyan; Li Gang; Zhao Pei

来源：Rare Metal Materials and Engineering, 2013, 42(11): 2341-2345.

• TiO2 nanotubes
• photoanode
• hydrogenated
• photocatalytic water splitting
• hydrogen

TiO2 nanotubes were prepared by annealing the as-prepared samples in air at 500 degrees C, and then in hydrogen atmosphere at 300 square C. Hydrogenated TiO2 nanotube arrays were studied by scanning electron microscopy (SEM), transmission electron microscopy (TEM), X-ray diffraction microscopy (XRD), and X-ray photoelectron spectroscopy (XPS). Results show that hydrogen-treated TiO2 nanotube arrays areconsisted of anatase phase TiO2 nanotube walls and disordered nanophase in the surface of TiO2 nanotube walls. It is demonstrated that the presence of the Ti-OH energy states in disordered nanophase. The hydrogenated TiO2 nanotube sample yields a photocurrent density of similar to 4.88 mA/cm(2) vs Ag/AgCl, in 1 mol/L NaOH solution under the illumination of simulated solar light (100 mW/cm(2) from lamp coupled with an AM 1.5 G filter). Remarkably, a 4-fold enhanced photocurrent density for TiO2 nanotubes after hydrogen treatment was observed.

• 出版日期2013-11
• 单位西北有色金属研究院