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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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Photocatalytic hydrogen production from water over m-doped La2Ti2O7 (M = Cr, Fe) under visible light irradiation (lambda > 420 nm)

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dc.contributor.author Hwang, Dong Won ko
dc.contributor.author Kirn, Hyun Gyu ko
dc.contributor.author Lee, Jae Sung ko
dc.contributor.author Kim, Jindo Kim ko
dc.contributor.author Li, Wei ko
dc.contributor.author Oh, Se Hyuk ko
dc.date.available 2015-07-30T00:49:56Z -
dc.date.created 2015-07-29 ko
dc.date.issued 2005-02 -
dc.identifier.citation JOURNAL OF PHYSICAL CHEMISTRY B, v.109, no.6, pp.2093 - 2102 ko
dc.identifier.issn 1520-6106 ko
dc.identifier.uri https://scholarworks.unist.ac.kr/handle/201301/13102 -
dc.identifier.uri http://pubs.acs.org/doi/abs/10.1021/jp0493226 ko
dc.description.abstract In the search for efficient photocatalysts working under visible light, we have investigated the effect of cation substitution on a layered perovskite, La2Ti2O7. Among various metal dopants, only Cr and Fe induced intense absorption of visible light (lambda > 400 nm), and only these catalysts produced H-2 photocatalytically from water in the presence of methanol under visible light irradiation (lambda > 420 nm). The polymerized complex method was found to be more efficient for fabrication of the present catalysts producing a more homogeneous structure than the solid-state reaction. The characterization by XRD, UV-vis DRS, XPS, and XANES revealed that doped Cr and Fe were present in the Cr3+ and Fe3+ states substituting for Ti sites in the La2Ti2O7 lattice. The theoretical calculation indicated that the most significant feature in the electronic band structure of the metal-doped La2Ti2O7 was the formation of a partially filled 3d band in the band gap of La2Ti2O7, while the contribution of these dopants on the valence band was negligible. Excitation of electrons from this localized interband to the conduction band of La2Ti2O7 was responsible for visible light absorption and the H-2 evolution from water under visible light ko
dc.description.statementofresponsibility close -
dc.language ENG ko
dc.publisher AMER CHEMICAL SOC ko
dc.subject RAY-ABSORPTION SPECTROSCOPY ko
dc.subject X-RAY ko
dc.subject LAYERED PEROVSKITE ko
dc.subject TITANIUM-OXIDES ko
dc.subject DECOMPOSITION ko
dc.subject COMBINATION ko
dc.subject OXIDATION ko
dc.subject CHROMIUM ko
dc.subject SRTIO3 ko
dc.subject TIO2 ko
dc.title Photocatalytic hydrogen production from water over m-doped La2Ti2O7 (M = Cr, Fe) under visible light irradiation (lambda > 420 nm) ko
dc.title.alternative Photocatalytic hydrogen production from water over m-doped La2Ti2O7 (M = Cr, Fe) under visible light irradiation (lambda > 420 nm) ko
dc.type ARTICLE ko
dc.identifier.wosid 000226956300008 ko
dc.type.rims ART ko
dc.description.wostc 157 *
dc.date.tcdate 2015-12-28 *
dc.identifier.doi 10.1021/jp04932226 ko
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