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Lee, Jae Sung
Eco-friendly Catalysis and Energy Lab
Research Interests
  • Photocatalytic water splitting, artificial photosynthesis, fuel cells, heterogeneous catalysis

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Platinum Nanoparticle Co-Catalyst-Induced Improved Photoelectrical Properties in a Chromium-Doped SrTiO3 Photocatalyst

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Title
Platinum Nanoparticle Co-Catalyst-Induced Improved Photoelectrical Properties in a Chromium-Doped SrTiO3 Photocatalyst
Other Titles
Platinum Nanoparticle Co-Catalyst-Induced Improved Photoelectrical Properties in a Chromium-Doped SrTiO3 Photocatalyst
Author
Jang, J. S.Lee, Jae SungBorse, Pramod H.Lim, K. T.Jung, O. -S.Jeong, E. D.Won, M. S.Kim, H. G.
Keywords
Cr-doped SrTiO3; Solid state reaction; Photocatalysis; Hydrogen production
Issue Date
2009-12
Publisher
KOREAN PHYSICAL SOC
Citation
JOURNAL OF THE KOREAN PHYSICAL SOCIETY, v.55, no.6, pp.2470 - 2475
Abstract
SrTi1-xCrxO3 (0 <= x <= 0.5) photocatalysts were prepared by using conventional solid state reactions at 1300 degrees C for 5 h and were characterized by using ultraviolet-visible (UV-vis) absorption spectroscopy. SrTi1-xCrxO3 samples not only absorb UV light photons, but also visible light photons due to substitutional doping of chromium at titanium sites in the SrTiO3 lattice. Apparently, the band transition from the Cr 3d to the Cr 3d + Ti-3d hybrid orbital induces visible light absorptivity in SrTi1-xCrxO3 samples. The photocatalytic activity of Cr-doped SrTiO3 samples for hydrogen production from water-methanol mixtures tinder UV light irradiation decreased with increased Cr doping concentration in SrTiO3. Conclusively, there exists an optimum chromium and platinum concentration in SrTiO3 for achieving high photocatalytic activity under visible light (lambda >= 420 nm
URI
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DOI
10.3938/jkps.55.2470
ISSN
0374-4884
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ECHE_Journal Papers
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