Author/Authors :
Alzamani، M. نويسنده M.Sc., Mechanical Department, Advanced Materials and Nanotechnology Research Lab., K. N. Toosi University of Technology, P. O. Box: 19991-43344, Tehra , , Shokuhfar، A. نويسنده , , Mastali، S. نويسنده M. Sc., Faculty of Metallurgical and Materials Engineering, Semnan University, P. O. Box: 19111-35131, Semnan, Iran. , , Eghdam، E. نويسنده M. Sc., Mechanical Department, Advanced Materials and Nanotechnology Research Lab., K. N. Toosi University of Technology, P. O. Box: 19991-43344, Tehr , , Hossaini، M. A. نويسنده Professor, chemistry & Environmental Department, SAPCO (Supplying Automotive Parts Co.), Tehran, Iran. ,
Abstract :
TiO2-SiO2 photocatalytic nanostructure film on windshield was prepared via sol–gel dip-coating method for self-cleaning purposes. TiO2 films were prepared on automotive glass pre-coated with a SiO2 layer by a dip-coating method followed by annealing at 500 °C for 30 min. The films were characterized using X-ray Diffraction (XRD) and Scanning Electron Microscopy (SEM, FE-SEM) techniques. The TiO2-SiO2 films were transparent, uniform and crack-free and the temperature was best chosen. XRD shows that SiO2 pre-coated layer comparatively prevent rare elements ions diffusion from substrate to avoid unfavorable compounds. The results illustrate the crystalline anatase as main phase for films annealed at 500 °C with average crystallite size of 22-26 nm, which was preferable due to much higher photocatalytic activity of anatase compared to rutile phase. The FE-SEM surface morphology results indicate that the particle size was 22 nm, whereas some pores observed in the coatings which were due to un-perfect solvent evaporation.
