SHEN Qianhong¹, GAO Jiwei ^1,2, GUO Xingzhong^1,2, YANG Hui^1,2

(1. Department of Materials Sceicne and Engineering of Zhejiang Univers ity, Hangzhou 310027; 2. Green Building Materials and Applied Technology Engineering Research Center, Hangzhou 310027)

Abstract:  TiO₂ sol containing anatase colloidal particles was used to spread on various substrates , such as copper, Al₂O₃ ceramic, microscope slide, PC plate, PVC sheet, PET thick film, paint coating, and paper sheet, etc. Scanning electron microscope was adopted to investigate the surface morphology of TiO₂ films , and the optics property and photocatalytic activity of TiO₂ film coated on the microscope slide were also tested. The results show that TiO₂ sol has well film forming ability on various substrates . As prepared TiO₂ film is transparent, and will not cover the color of the substrate. Moreover, this film has good photocatalytic activity.

Key words: Titania sol, anatase, Titania film, film forming ability, transparency, photocatalysis