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dc.contributor.author Kim, Soon Hyun -
dc.contributor.author Hwang, Seong-Ju -
dc.contributor.author Choi, Wonyong -
dc.date.available 2017-07-05T09:04:40Z -
dc.date.created 2017-04-10 -
dc.date.issued 2005-12 -
dc.identifier.citation Journal of Physical Chemistry B, v.109, no.51, pp.24260 - 24267 -
dc.identifier.issn 1520-6106 -
dc.identifier.uri http://hdl.handle.net/20.500.11750/2530 -
dc.description.abstract Platinum-ion-doped TiO2 (Ption-TiO2) was synthesized by a sol-gel method, and its visible light photocatalytic activities were successfully demonstrated for the oxidative and reductive degradation of chlorinated organic compounds. Ption-TiO2 exhibited a yellow-brown color, and its band gap was lower than that of undoped TiO2 by about 0.2 eV. The flat band potential of Pt ion-TiO2 was positively shifted by 50 mV compared with that of undoped TiO2. X-ray absorption spectroscopy and X-ray photoelectron spectroscopy analyses showed that the Pt ions substituted in the TiO2 lattice were present mainly in the Pt(IV) state with some Pt(II) on the sample surface. Ption-TiO2 exhibited higher photocatalytic activities than undoped TiO2 under UV irradiation as well. The visible light activity of Ption-TiO2 was strongly affected by the calcination temperature and the concentration of Pt ion dopant, which were optimal at 673 K and 0.5 atom %, respectively. Under visible irradiation, Ption-TiO2 degraded dichloroacetate and 4-chlorophenol through an oxidative path and trichloroacetate via a reductive path. The activity of Ption-TiO2 was not reduced when used repeatedly under visible light. However, visible-light-illuminated Ption-TiO2 could not degrade substrates such as tetramethylammonium and trichloroethylene, which are degraded with UV-illuminated TiO2. The characteristics and reactivities of Ption-TiO2 as a new visible light photocatalyst were investigated in various ways and discussed in detail. © 2005 American Chemical Society. -
dc.language English -
dc.publisher American Chemical Society -
dc.title Visible light active platinum-ion-doped TiO2 photocatalyst -
dc.type Article -
dc.identifier.doi 10.1021/jp055278y -
dc.identifier.wosid 000234259900009 -
dc.identifier.scopusid 2-s2.0-30344454694 -
dc.type.local Article(Overseas) -
dc.type.rims ART -
dc.description.journalClass 1 -
dc.citation.publicationname Journal of Physical Chemistry B -
dc.contributor.nonIdAuthor Hwang, Seong-Ju -
dc.contributor.nonIdAuthor Choi, Wonyong -
dc.identifier.citationVolume 109 -
dc.identifier.citationNumber 51 -
dc.identifier.citationStartPage 24260 -
dc.identifier.citationEndPage 24267 -
dc.identifier.citationTitle Journal of Physical Chemistry B -
dc.type.journalArticle Article -
dc.description.isOpenAccess N -
dc.subject.keywordPlus ELECTRON-HOLE RECOMBINATION -
dc.subject.keywordPlus INDUCED WATER CLEAVAGE -
dc.subject.keywordPlus TITANIUM-DIOXIDE -
dc.subject.keywordPlus PHOTOELECTROCHEMICAL PROPERTIES -
dc.subject.keywordPlus INDUCED DEGRADATION -
dc.subject.keywordPlus SENSITIZED TIO2 -
dc.subject.keywordPlus SEMICONDUCTOR -
dc.subject.keywordPlus PARTICLES -
dc.subject.keywordPlus PHOTOOXIDATION -
dc.subject.keywordPlus DETOXIFICATION -
dc.contributor.affiliatedAuthor Kim, Soon Hyun -
dc.contributor.affiliatedAuthor Hwang, Seong-Ju -
dc.contributor.affiliatedAuthor Choi, Wonyong -
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