Abstract
We synthesize TiO2 by sol-gel process using TTIP in various solutions to manipulate the morphologies of the products. The photocatalytic performance of these powders were examined and discussed in detail. In the first experiment, NaF(aq) and ethanol were added as hydrolysis took place. The NaF precipitated in solution acted as a template on which precursor preferentially react.. In second experiment, we used water and ethanol to hydrolyze the alkoxide. We obtain sphere-like amorphous TiO2 because it has the least surface energy. Then, we use NaF solution to do hydrothermal reaction. We obtain hollow sphere and possess (001) plane which is the most active plane in anatase TiO2. We also discuss photocatalytic performance of these TiO2.