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Bulletin of the Korean Chemical Society (BKCS)

ISSN 0253-2964(Print)
ISSN 1229-5949(Online)
Volume 32, Number 1
BKCSDE 32(1)
January 20, 2011

Title	Photocatalytic hydrogen production in water-methanol mixture over iron-doped CaTiO₃
Author	J. S. Jang, P. H. Borse, J. S. Lee, K. T. Lim, O. S. Jung, E. D. Jeong, J. S. Bae, H. G. Kim*,
Keywords	Fe doped CaTiO₃, Solid state reaction, Photocatalysis, Visible light, Hydrogen production
Abstract	CaTi_1-xFe_xO₃ (0 ≤ x ≤ 0.4) solid solution photocatalysts were synthesized by iron doping during the conventional solid state reaction at 1100 ^oC for 5 h and characterized by ultraviolet-visible (UV-vis) absorption spectroscopy, X-ray diffraction, morphological analysis. We found that CaTi_1-xFe_xO₃ samples not only absorb UV but also the visible light photons. This is because the Fe substitution at Ti-site in CaTi_1-xFe_xO₃ lattice induces the band transition from Fe3d to the Fe3d + Ti3d hybrid orbital. The photocatalytic activity of Fe doped CaTiO₃ samples for hydrogen production under UV light irradiation decreased with the increase in the Fe concentration. There exists an optimized concentration of iron in CaTiO₃, which yields a maximum photocatalytic activity under visible light (λ ≥ 420 nm) photons.
Page	95 - 99
Full Text	PDF

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