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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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Enhanced photochemical properties of electron rich W-doped PbBi2Nb2O9 layered perovskite material under visible-light irradiation

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Title
Enhanced photochemical properties of electron rich W-doped PbBi2Nb2O9 layered perovskite material under visible-light irradiation
Other Titles
Enhanced photochemical properties of electron rich W-doped PbBi2Nb2O9 layered perovskite material under visible-light irradiation
Author
Kim, Hyun GyuBorse, Pramod H.Jang, Jum SukJeong, Euh DuckLee, Jae Sung
Keywords
perovskites; photoelectrochemical; photocatalysis; solar energy materials
Issue Date
2008-03
Publisher
ELSEVIER SCIENCE BV
Citation
MATERIALS LETTERS, v.62, no.8-9, pp.1427 - 1430
Abstract
The substitution effect of W6+ at Nb5+ site in PbBi2Nb2O9, a layered Aurivillius-phase perovskite system, has been studied and further optimized to fabricate an efficient photocatalyst. The material doped with electron donor (W+6), PbBi2Nb2-xWxO9 with an optimum composition of x = 0.15 exhibited a red shifted (0.14 eV) band gap, generated two times higher photocurrent, and showed analogous higher quantum yield for photodecomposition of H2O/CH3OH solution than undoped material under visible light ((lambda >= 420 nm). In contrast, the material doped with hole donor (Ti+4) revealed deteriorated photochemical properties. The higher electron density by n-type doping seems to be responsible for the more efficient charge separation in PbBi2Nb2-xWxO9 (0
URI
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DOI
10.1016/j.matlet.2007.08.089
ISSN
0167-577X
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ECHE_Journal Papers
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