Preparation and Properties of Titanium Oxide Photocatalyst with Visible Light Activity
TiO2 photocatalyst were obtained from the hydrolysis product of TiOSO4 with ammonia and the photocatalytic activities were investigated by the photocatalytic degradation of methyl orange aqueous solution under UV-light and visible-light. The results showed that the absorption intensity in visible-light was dependent on the concentration of the materials, pH value and heat-treatment temperature. The color of the TiO2 varied from yellowish to vivid yellow when the TiO2 was calcined at different temperatures from 300°C to 500°C for 1h. The photocatalytic activity of TiO2 under visible light was determined by the photo-absorption feature in visible light region, which was related to the heattreatment temperature. The TiO2 calcined at 400°C shows stronger photo-absorption in visible light region and exhibits higher visible-light activity than the TiO2 calcined at other temperature.
Wei Pan, Jianghong Gong, Chang-Chun Ge and Jing-Feng Li
L. E et al., "Preparation and Properties of Titanium Oxide Photocatalyst with Visible Light Activity", Key Engineering Materials, Vols. 280-283, pp. 377-380, 2005