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Self-cleaning TiO2 nanofilms on FTO glass: Influence of electrophoretic deposition and UV irradiation conditions

Horandghadim, N ; Sharif University of Technology | 2015

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  1. Type of Document: Article
  2. DOI: 10.4028/www.scientific.net/JNanoR.30.39
  3. Publisher: Trans Tech Publications Ltd , 2015
  4. Abstract:
  5. In this research, anatase TiO2 nano-particles were electrophoretically deposited on the FTO glass. This investigation was focused on the self-cleaning property of TiO2 coatings and the effects of different parameters on this characteristic such as: applied voltages during electrophoretic depositions and durations of UV irradiation. Electrophoretic depositions of suspensions were performed in different voltages of 10, 30 and 60 V (for 10 s) at room temperature. TiO2 coatings were sintered in 450oC for 1 hr. The phase transformation of TiO2 films was considered using XRD. Morphology, average particle size and the thickness of TiO2 films was analyzed using FESEM microscope. The photocatalytic activity of TiO2 films was evaluated by the degradation of aqueous methyl orange (MO) under UV irradiation. The ultraviolet-visible spectrophotometer was used to record the changes of the adsorbancy of the MO solution. Hydrophilicity of TiO2 films was determined by measuring contact angle of water droplet with the surface of TiO2 films. Results represented that decomposition rate of MO solution by TiO2 films enhances from 6. 5% to 31% by increasing applied voltage of deposition from 10 to 60V and from 5% to 40% by increasing UV illumination duration from 1 to 5 hours. It was also observed that the contact angles of water droplet with the surface of TiO2 films decrease from 34o to 6. 6o by increasing applied voltage from 10 to 60V
  6. Keywords:
  7. TiO2 ; Azo dyes ; Coatings ; Contact angle ; Deposition ; Drops ; Electrophoresis ; Electrophoretic coatings ; Glass ; Hydrophilicity ; Irradiation ; Nanoparticles ; Particle size ; Photodegradation ; Sintering ; Electrophoretic ; Nano films ; Photo-catalytic ; Selfcleaning ; TiO ; Titanium dioxide
  8. Source: Journal of Nano Research ; Volume 30 , 2015 , Pages 39-49 ; 16625250 (ISSN)
  9. URL: http://www.scientific.net/JNanoR.30.39