A series of photocatalytic composite films were prepared by using anatase titanium sol or P25 type TiO2 powders as photocatalytic materials

and polysiloxane (PDMS) or polyacrylate (PA) as binders.The crystalline phase and dispersion of the two TiO2 particles in organic media (toluene and polymeric matrixes) and photocatalytic degradation of organic matrixes by TiO2 particles were characterized by X-ray diffraction analysis

particle size analysis

field emission scanning electron microscopy

transmission electron microscopy

3D optical microscopy

weight loss evaluation and UV-Vis spectroscopy

respectively.In addition

photocatalytic activity of PMDS/TiO2 composite films was evaluated by photocatalytic degradation of acid fuchsine 6B under UV irradiation.Titanium sol prepared via sol-gel process was composed of small crystalline grains with a size of about 3 nm

and indeed displayed a higher crystallinity.In comparison to P25 type TiO2

the titanium sol revealed a better compatibility with organic media.They could be uniformly dispersed in organic media without aggregation.Therefore

compared with the composite film with P25 type TiO2

the CC based polymeric matrix was degraded more seriously in the composite films with titanium sol due to their better photocatalytic ability and better dispersion.In contrast

the SiO bonds in the main chain of polysiloxane could resist the strong oxidation of high-energy radicals derived from photocatalytic titaniumsol.Thus

polysiloxane can be used as an ideal photocatalytic organic matrix to load titanium sol

and a kind of composite films with a strong photocatalytic activity and high stability can be obtained.