Photocatalytic and photoelectrochemical studies on N-doped TiO2 photocatalyst

Xintong Zhang, Keizo Udagawa, Zhaoyue Liu, Shunsuke Nishimoto, Changshan Xu, Yichun Liu, Hideki Sakai, Masahiko Abe, Taketoshi Murakami, Akira Fujishma

Research output: Contribution to journalArticle

62 Citations (Scopus)

Abstract

One of the commercial N-doped TiO2 powders (Sumitomo Chemicals, TPS 201) was studied as a model material by photocatalytic and photoelectrochemical methods in order to evaluate the photoactivity of N-doped TiO2 materials and the possibility of their applications in solar photocatalysis. The N-doped TiO2 powder (TPS) was able to degrade and mineralize phenol under solar or visible light (VL) irradiation, and the degradation rate was strongly dependent on the suspension concentration. Photoelectrochemical studies showed that the VL-irradiated TPS electrode was able to oxidize water, phenol, as well as maleic acid, an open-ring oxidized product of phenol, consistent with the results of photocatalytic studies. Calcining the TPS powder at/over 773 K was found to lower the absorption in the VL region and the photocatalytic activity under VL irradiation, but improve the photocatalytic activity under solar irradiation, suggesting that the mid-gap states introduced by nitrogen doping also worked as recombination centers. Deposition of Pt (0.2 wt%) on the TPS photocatalyst thus greatly increased the degradation rate of phenol under either solar or VL irradiation due to the suppression of charge recombination, and the degradation rate was found to be higher than a pristine TiO2 photocatalyst (ST-01, anatase) either with or without loading of Pt. The potential application of the N-doped TiO2 in solar photocatalysis was discussed on the basis of above-mentioned studies.

Original languageEnglish
Pages (from-to)39-47
Number of pages9
JournalJournal of Photochemistry and Photobiology A: Chemistry
Volume202
Issue number1
DOIs
Publication statusPublished - Feb 5 2009
Externally publishedYes

Fingerprint

Photocatalysts
Phenol
phenols
Phenols
Irradiation
Powders
irradiation
Photocatalysis
degradation
Degradation
anatase
Titanium dioxide
Suspensions
Nitrogen
Doping (additives)
retarding
nitrogen
Electrodes
acids
electrodes

Keywords

  • Nitrogen doping
  • Photocatalysis
  • Photoelectrochemistry
  • TiO

ASJC Scopus subject areas

  • Chemistry(all)
  • Chemical Engineering(all)
  • Physics and Astronomy(all)

Cite this

Photocatalytic and photoelectrochemical studies on N-doped TiO2 photocatalyst. / Zhang, Xintong; Udagawa, Keizo; Liu, Zhaoyue; Nishimoto, Shunsuke; Xu, Changshan; Liu, Yichun; Sakai, Hideki; Abe, Masahiko; Murakami, Taketoshi; Fujishma, Akira.

In: Journal of Photochemistry and Photobiology A: Chemistry, Vol. 202, No. 1, 05.02.2009, p. 39-47.

Research output: Contribution to journalArticle

Zhang, Xintong ; Udagawa, Keizo ; Liu, Zhaoyue ; Nishimoto, Shunsuke ; Xu, Changshan ; Liu, Yichun ; Sakai, Hideki ; Abe, Masahiko ; Murakami, Taketoshi ; Fujishma, Akira. / Photocatalytic and photoelectrochemical studies on N-doped TiO2 photocatalyst. In: Journal of Photochemistry and Photobiology A: Chemistry. 2009 ; Vol. 202, No. 1. pp. 39-47.
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