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Preparation of S, C cation-codoped SrTiO 3 and its photocatalytic activity under visible light

Applied Catalysis A: General, ISSN: 0926-860X, Vol: 288, Issue: 1, Page: 74-79
2005
  • 196
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  • 78
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Metrics Details

  • Citations
    196
    • Citation Indexes
      196
  • Captures
    78

Article Description

S, C cation-codoped strontium titanium dioxide (SrTiO 3 ) was synthesized by calcination of a mixture of thiourea and SrTiO 3 powders in a lidded crucible. After C and S ions were doped into SrTiO 3, the absorption edge of SrTiO 3 powder was greatly shifted from 400 to 700 nm. The obtained powder was found by XPS, XRD and FT-IR to have a perovskite structure in which C and S atoms were incorporated into SrTiO 3. S and C doping improved the photocatalytic activity of the doped SrTiO 3 for oxidation of 2-propanol. Under a wide range of light irradiation at wavelengths longer than 350 nm, the photocatalytic activity levels of C, S cation-codoped SrTiO 3 were about two times higher than those of pure SrTiO 3. We found that a new absorption edge was formed in the visible light region due to doping of S and C atoms. The formation of this new absorption edge might be the reason for the high level of visible-light photocatalytic activity of this substance.

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