Photocatalytic performance of iron (III) and niobium (V)-codoped TiO 2 nanopowders synthesized by a radio frequency thermal plasma process

C. N. Zhang, M. Ikeda, T. Uchikoshi, J. G. Li, Takayuki Watanabe, T. Ishigaki

研究成果: ジャーナルへの寄稿記事

1 引用 (Scopus)

抄録

Iron (III) and niobium (V)-codoped TiO2 nanopowders have been synthesized by Ar/O2 RF thermal plasma. Phase composition, morphology, and photocatalytic performance of the plasma-generated powders have been investigated by the combined means of XRD, FE-SEM/TEM, and UV-vis absorption spectroscopy. Rutile formation in the plasma-produced phase composition of anatase and rutile was promoted by Fe3+ addition but was inhibited by Nb5+ doping. The resultant powders consisted of a majority of fine crystallites (several nanometers) and a small portion of coarse particles (~ 100 nm). In comparison with TiO2 singly doped with 0.1 at.% of Fe3+, photocatalytic reactivity of codoped TiO2 was improved at 2.0 at.% of Nb5+ but was depressed at 6.0 at.% under the UV irradiation, indicating that UV-induced photocatalytic capability was dominated by Nb5+ doping concentration. In contrast to the case of 1.0 at.% of Fe3+ single addition, the codoped sample obtained the decreased photocatalytic performance with increasing Nb5+ content under the visible light irradiation, due to the low visible light absorption resulting from a broadened band gap.

元の言語英語
ページ(範囲)6940-6943
ページ数4
ジャーナルThin Solid Films
519
発行部数20
DOI
出版物ステータス出版済み - 8 1 2011
外部発表Yes

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Niobium
Plasma Gases
thermal plasmas
niobium
rutile
radio frequencies
Iron
Plasmas
Phase composition
iron
Powders
irradiation
electromagnetic absorption
Doping (additives)
Irradiation
anatase
crystallites
absorption spectroscopy
reactivity
Ultraviolet spectroscopy

All Science Journal Classification (ASJC) codes

  • Electronic, Optical and Magnetic Materials
  • Surfaces and Interfaces
  • Surfaces, Coatings and Films
  • Metals and Alloys
  • Materials Chemistry

これを引用

Photocatalytic performance of iron (III) and niobium (V)-codoped TiO 2 nanopowders synthesized by a radio frequency thermal plasma process. / Zhang, C. N.; Ikeda, M.; Uchikoshi, T.; Li, J. G.; Watanabe, Takayuki; Ishigaki, T.

:: Thin Solid Films, 巻 519, 番号 20, 01.08.2011, p. 6940-6943.

研究成果: ジャーナルへの寄稿記事

Zhang, C. N. ; Ikeda, M. ; Uchikoshi, T. ; Li, J. G. ; Watanabe, Takayuki ; Ishigaki, T. / Photocatalytic performance of iron (III) and niobium (V)-codoped TiO 2 nanopowders synthesized by a radio frequency thermal plasma process. :: Thin Solid Films. 2011 ; 巻 519, 番号 20. pp. 6940-6943.
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