**4. Conclusions**

The mechanically durable, optically transparent, photocatalytically active and superhydrophilic SiO2-TiO2 coatings are successfully prepared on PC substrates for self-cleaning applications. The uniform, crack-free coatings prepared from 7 vol% of SiO2 in TiO2 showed higher optical transmission in the visible range, strong superhydrophilicity and good scratch resistance properties. Such coatings can be applied on light-weight window and door polycarbonates for excellent selfcleaning applications.
