| 초록 |
Iron or tungsten doped nano TiO2 were successfully synthesized from TiCl4. All of the samples showed anatase phase of TiO2. For the iron doped TiO2, Fe ion was well dispersed in the TiO2 lattice. However, tungsten doped TiO2 formed 12-tungstate with anatase TiO2. As increasing the concentration of tungsten, 12-tungstate was disappeared. The photocatalytic oxidation of acetaldehyde was evaluated to examine the photocatalytic characteristics of metal doped TiO2. Because of the surface remaining metal oxide or metal precursors at high concentration metal ion, as increasing the concentration of W or Fe ion, the reactivity was decreased. The reaction rate was drastically increased after 300oC heat treatment. Furthermore, the photocatalytic activity of iron or tungsten doped TiO2 was higher than synthesized pure TiO2 and commercial TiO2. |
