关键词: TiO2纳米线, 钛酸丁酯, 水热法, 光催化活性

Abstract: Titanium dioxide(TiO2) nanowires were synthesized by one\|step hydrothermal method   using tetrabutyl titanate, isopropanol and sodium hydroxide as starting materials. The synthesized TiO2 nanowires were characterized by scanning electron microscopy(SEM), X-ray diffraction(XRD) and energy dispersive X-ray spectrometry(EDX). The effects of reaction temperature, concentration of sodium hydroxide and reaction time on the formation of the nanowires were investigated. It is found that the optimum reaction temperature, concentration of sodium hydroxide and reaction time for the formation of high quality TiO2 nanowires are 180 ℃, 10 mol/L and 24 h, respectively. The nanowires were still anatase phase even if the calcination temperature increased to 950 ℃, indicating that the phase transition of TiO2  from anatase to rutile was delayed. In addition, the photocatalytic activities of pure TiO2 nanowires and TiO2 nanowires doped with Eu were studied under the irradiation of 300 W UV-lamp for 60 min, using methyl orange solution as the target degradation material. The results indicate that the degradation ratio of Eu-doped TiO2 nanowires is 1.5 times   that of pure TiO2 nanowires, and the optimum doping amount of Eu is 1.6%.

Key words: TiO2 nanowire, Tetra-butyl titanate, Hydrothermal method, Photocatalytic activity