Preparation and Property Studies of TiO{sub}2 Membrane/ Macroporous Silica Composite Microspheres

摘要

Using Quartz particles as the repeat-agents, commercial water glass as the raw material, butyl titanate as the source of titanium, the TiO{sub}2 Membrane/ Macroporous Silica gel composite microspheres were successfully prepared. The uniformity transparent TiO{sub}2 Membrane on the surface of Silica gel microspheres(SM) was inducted by sol-gel method and dipping extracted method. The structure and performance of the microspheres were characterized by Infrared Spectroscopy (IR) and X-ray diffraction (XRD). The results showed that the composite microspheres were irregular porous materials and their average diameter was 2.18 mm. The crystal type of the TiO{sub}2 film was anatase and its average size was 15 nm. Illuminated for 7.5h, the degradation ratio of the composite microspheres was up to 85%. The properties of photocatalysis would be increased with the increasing of the amount of the quartz.