Abstract As a photocatalysis environmental material,nanometer TiO2 can effectively degrade pollutants,and mineralize them to CO2,H2O and other inorganic smallmolecule substances.So nanometer TiO2 can be applied to waste water treatmen,t air cleaning,sterilization and deodorization.In this paper,a review is given on its preparation and photoinduced superhydrophilicity mechanism of nanometer TiO2,and the research progress and application prospect of nanometer TiO2 in self cleaning building materials and sterilization etc.
