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http://dx.doi.org/10.5012/bkcs.2011.32.1.95

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)
Publication Information
Bulletin of the Korean Chemical Society / v.32, no.1, 2011 , pp. 95-99 More about this Journal
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.
Keywords
Fe doped $CaTiO_3$; Solid state reaction; Photocatalysis; Visible light; Hydrogen production;
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