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Journal of Advanced Ceramics

, Volume 7, Issue 3, pp 185–196 | Cite as

Preparation of transparent nanostructured N-doped TiO2 thin films by combination of sonochemical and CVD methods with visible light photocatalytic activity

  • Hossein Rasoulnezhad
  • Ghader Hosseinzadeh
  • Reza Hosseinzadeh
  • Naser Ghasemian
Open Access
Research Article
  • 27 Downloads

Abstract

Pollution of water resources with pesticide compounds has raised serious environmental problems, and for photocatalytic degradation of these pollutants, thin film photocatalysts are preferred to colloidal ones due to the separation problem of colloidal nanoparticles. In this work, nanostructured TiO2 and N-doped TiO2 thin films with high transparency were deposited on glass and quartz substrates through sonochemical–chemical vapor deposition (CVD) method. The films prepared on glass and quartz substrates had nanocubic and nanospherical morphology, respectively. The presence of N atoms in the structure of TiO2 resulted in a decrease in the band gap energy of TiO2 and also in the reduction of photogenerated electron–hole recombination rate. Furthermore, the presence of N atoms induced the formation of Ti3+ species which can act as hole trapping centers. The prepared thin films were also used for the visible light photocatalytic degradation of paraoxon pesticide. According to these results among the prepared thin films, the N-doped TiO2 thin films have higher photocatalytic activity than pure TiO2 thin films. Moreover, in comparison with the thin films deposited on quartz substrate, the films on glass substrate have higher photocatalytic performance, which can be related to the special nanocubic morphology of these samples.

Keywords

N-doped TiO2 film transparent photocatalyst chemical vapor deposition (CVD) ultrasonic 

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Copyright information

© The Author(s) 2018

Authors and Affiliations

  • Hossein Rasoulnezhad
    • 1
  • Ghader Hosseinzadeh
    • 2
  • Reza Hosseinzadeh
    • 3
  • Naser Ghasemian
    • 2
  1. 1.Department of Electrical & Electronics EngineeringStandard Research Institute (SRI)KarajIran
  2. 2.Department of Chemical EngineeringUniversity of BonabBonabIran
  3. 3.Medical Laser Research Group, Medical Laser Research CenterACECRTehranIran

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