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Journal of Advanced Ceramics 2018, 7(3): 185-196 https://doi.org/10.1007/s40145-018-0270-8
Research Article | Open Access | Issue | Published: 10 October 2018

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

Show Author's Information Hossein RASOULNEZHADa,  Ghader HOSSEINZADEHb( ),  Reza HOSSEINZADEHc,  Naser GHASEMIANb
Department of Electrical & Electronics Engineering, Standard Research Institute (SRI), Karaj, Iran
Department of Chemical Engineering, University of Bonab, Bonab, Iran
Medical Laser Research Group, Medical Laser Research Center, ACECR, Tehran, Iran
Keywords:
photocatalyst, N-doped, TiO2 film, transparent, chemical vapor deposition (CVD), ultrasonic
Cite this article:
RASOULNEZHAD H, HOSSEINZADEH G, HOSSEINZADEH R, et al. Preparation of transparent nanostructured N-doped TiO2 thin films by combination of sonochemical and CVD methods with visible light photocatalytic activity. Journal of Advanced Ceramics, 2018, 7(3): 185-196. https://doi.org/10.1007/s40145-018-0270-8
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Abstract Full text About this article

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.


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About this article

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

Show Author's information Hossein RASOULNEZHADa, Ghader HOSSEINZADEHb( ), Reza HOSSEINZADEHc, Naser GHASEMIANb
Department of Electrical & Electronics Engineering, Standard Research Institute (SRI), Karaj, Iran
Department of Chemical Engineering, University of Bonab, Bonab, Iran
Medical Laser Research Group, Medical Laser Research Center, ACECR, Tehran, Iran

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

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Received: 11 December 2017
Revised: 03 March 2018
Accepted: 16 March 2018
Published: 10 October 2018
Issue date: September 2018

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© The author(s) 2018

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