Iron or tungsten-doped nano TiO 2 were successfully synthesized from TiCl 4 . All of the samples showed anatase phase of TiO 2 . For the iron-doped TiO 2 , Iron ion was well dispersed in the TiO 2 lattice. However, tungstendoped TiO 2 formed 12-tungstate with anatase TiO 2 . As the concentration of tungsten increased, 12-tungstate disappeared. The photocatalytic oxidation of acetaldehyde was evaluated to examine the photocatalytic characteristics of metal-doped TiO 2 . Because of the surface containing metal oxide or metal precursors at high concentration metal ion, increasing the concentration of W or Fe ion decreased the reactivity. The reaction rate was drastically increased after 300°C heat treatment. Furthermore, the photocatalytic activity of iron- or tungsten-doped TiO 2 was higher than that of synthesized pure TiO 2 and commercial TiO 2 .
All Science Journal Classification (ASJC) codes
- Chemical Engineering(all)