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Photoactive and self-cleaning TiO 2-SiO 2 thin films on 316L stainless steel

Boroujeny, B. S ; Sharif University of Technology

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  1. Type of Document: Article
  2. DOI: 10.1016/j.tsf.2012.03.051
  3. Abstract:
  4. In this study, TiO 2-SiO 2 nanocomposite films with different amounts of SiO 2 were prepared by sol-gel process and were coated onto stainless steel 316L. The effect of addition of various amount of SiO 2 in the precursor solution on the photocatalysis, photo-generated hydrophilicity and self-cleaning property of TiO 2 thin films was investigated by X-ray diffraction, Fourier transform infrared spectroscopy, water contact angle measurements and UV spectroscopy. In the tested ranges of SiO 2 content and sintering temperature, the highest photocatalytic activity and self-cleaning property were observed in the 15 mol% SiO 2 sample sintered at 750 °C. Addition of less than 30 mol% SiO 2 had a suppressive effect on the transformation of anatase to rutile and on the crystal growth of anatase in the sintering heat treatment. Phase separation occurred in the composite films for SiO 2 content of 30 mol% or more
  5. Keywords:
  6. Photo-generated hydrophilicity ; Photocatalysis ; Self-cleaning properties ; Silicon dioxide ; 316 L stainless steel ; Effect of addition ; Photocatalytic activities ; Precursor solutions ; Self-cleaning properties ; Sintering temperatures ; Stainless steel 316L ; TiO ; Water contact angle measurement ; Cleaning ; Composite films ; Crystal growth ; Fourier transform infrared spectroscopy ; Hydrophilicity ; Oxide minerals ; Phase separation ; Silica ; Sintering ; Sol-gel process ; Stainless steel ; Thin films ; Ultraviolet spectroscopy ; X ray diffraction ; Titanium dioxide
  7. Source: Thin Solid Films ; Volume 520, Issue 20 , 2012 , Pages 6355-6360 ; 00406090 (ISSN)
  8. URL: http://www.sciencedirect.com/science/article/pii/S0040609012003379