Abstract
The mixed-phase TiO2 photocatalysts with different anatase/rutile/brookite ratios and high specific surface area (157–218m2/g) were prepared by hydrothermal method at 100°C and the effect of rutile content in TiO2 on the BET surface area, light absorption and separation efficiency of photogenerated charge carriers was studied and correlated to the photocatalytic activity of TiO2. Rutile content increased from 0% to 100% by increasing the amount of TiCl4 in aqueous phase and the initial pH value of reaction solution played an important role in the phase composition of TiO2. The photocatalytic mechanism of mixed-phase TiO2 was discussed.
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