Clean, low-cost, and efficient nano-TiO2 composite photocatalyst: Preparation and performance in TiOSO4 hydrolysis system

Herein, SiO 2 -TiO 2 composite (STC) photocatalysts were prepared through placing SiO 2 microspheres in TiOSO 4 solution and calcining at high temperature. Using STC (containing only 5.09 wt% TiO 2 ), the degradation rate to MO with a concentration of 10 ppm was 100% at 50 min of UV illumination. The cost of the photocatalyst and the cleanliness of the preparation process were ensured due to the use of TiOSO 4 as the titanium source and the water as the solvent. Therefore, not only the photocatalytic effect and application performance of TiO 2 were improved, but realized the cleanliness of the preparation process and reduced the cost.