关键词: TiO2/SiO2复合薄膜, 自清洁, 粗糙度, 透光率

Abstract: TiO2/SiO2 composite film with self-cleaning property has been prepared using nanosize TiO2 particles produced by hydrothermal method and SiO2 polymeric particles by dip-coating technique. Effect of the volume fraction of SiO2 has been investigated on the surface morphology，visible light transmittance，photo-induced hydrophilicity and self-cleaning property of the composite film. As the volume fraction of SiO2 is increased，surface roughness，visible light transmittance，photo-induced hydrophilicity and self-cleaning property of the film show a similarity law over the SiO2 fraction，namely，when the volume fraction of SiO2 is about 25%，the above properties of the film reach a maximum or a minimum. With SiO2 volume fraction of 25%，the film can still show superhydrophilicity after having been kept outdoors for 28 days.

Key words: TiO2/SiO2 composite film, self-cleaning, roughness, light transmittance