Bulletin of the Korean Chemical Society

Korean Chemical Society (대한화학회)
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Photocatalytic Hydrogen Production in Water-Methanol Mixture over Iron-doped CaTiO3

  • Jang, J. S. (Department of Chemical Engineering, Pohang University of Science and Technology) ;
  • Borse, P. H. (Centre for Nanomaterials, International Advanced Research Centre for Powder Metallurgy and New Materials (ARC International)) ;
  • Lee, J. S. (Department of Imaging System Engineering, Pukyong National University) ;
  • Lim, K. T. (Department of Chemistry, Pusan National University) ;
  • Jung, O. S. (Busan High Tech Center, Korea Basic Science Institute) ;
  • Jeong, E. D. (Busan High Tech Center, Korea Basic Science Institute) ;
  • Bae, J. S. (Busan High Tech Center, Korea Basic Science Institute) ;
  • Kim, H. G. (Busan High Tech Center, Korea Basic Science Institute)
  • Received : 2010.06.30
  • Accepted : 2010.10.22
  • Published : 2011.01.20
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Abstract

$CaTi_{1-x}Fe_xO_3(0{\leq}x{\leq}0.4)$ solid solution photocatalysts were synthesized by iron doping during the conventional solid state reaction at $1100^{\circ}C$ for 5 h and characterized by ultraviolet-visible (UV-vis) absorption spectroscopy, X-ray diffraction, morphological analysis. We found that $CaTi_{1-x}Fe_xO_3$ samples not only absorb UV but also the visible light photons. This is because the Fe substitution at Ti-site in $CaTi_{1-x}Fe_xO_3$ lattice induces the band transition from Fe3d to the Fe3d + Ti3d hybrid orbital. The photocatalytic activity of Fe doped $CaTiO_3$ samples for hydrogen production under UV light irradiation decreased with the increase in the Fe concentration. There exists an optimized concentration of iron in $CaTiO_3$, which yields a maximum photocatalytic activity under visible light ($\lambda\geq420nm$) photons.

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