Preparation and Photo-Catalytic Activity of Supported TiO2 Composites

Supporting body of diatomite-based porous ceramics was prepared by solid-phase sintering and low-temperature calcination process. Nano-TiO₂ film was loaded on the surface by hydrolysis deposition method taking titanium tetrachloride as the precursor. Composite structure was characterized by X-ray diffraction, Fourier transform infrared spectroscopy and scanning electron microscope. The photo-catalytic property of TiO₂ thin film was investigated by the degradation of malachite green. Results indicated that TiO₂ crystal calcined at 550°C was anatase; Average particle size of TiO₂ is about 10 nm; When TiO₂ film was irradiated 6h under ultraviolet, the degradation ratio for 5 mg/L malachite green aqueous solution reached 86.2%.