DC Field | Value | Language |
---|---|---|
dc.contributor.author | Kim, J | - |
dc.contributor.author | Lee, CW | - |
dc.contributor.author | Choi, W | - |
dc.date.accessioned | 2016-04-01T02:33:17Z | - |
dc.date.available | 2016-04-01T02:33:17Z | - |
dc.date.created | 2010-12-06 | - |
dc.date.issued | 2010-09-01 | - |
dc.identifier.issn | 0013-936X | - |
dc.identifier.other | 2010-OAK-0000022347 | - |
dc.identifier.uri | https://oasis.postech.ac.kr/handle/2014.oak/25345 | - |
dc.description.abstract | This study aims to understand the visible light photocatalytic activities of platinized WO3(Pt/WO3) on the degradation of aquatic pollutants and the role of main photooxidants. The presence of Pt on WO3 is known to facilitate the multielectron reduction of O-2, which enables O-2 to serve as an electron acceptor despite the insufficient reduction potential of the conduction band electrons (in WO3) for the one-electron reduction of O-2. The concurrent oxidative reactions occurring on WO3 were markedly enhanced in the presence of Pt and accompanied the production of OH radicals under visible light, which was confirmed by both a fluorescence method (using a chemical trap) and a spin trap method. The generation of OH radicals mainly comes from the reductive decomposition of H2O2 that is produced in situ from the reduction of O-2 on Pt/WO3. The rate of in situ production of H2O2 under visible light was significantly faster with Pt/WO3 than WO3. Six substrates that were tested for the visible light (lambda > 420 nm) induced degradation on Pt/WO3 included dichloroacetate (DCA), 4-chlorophenol (4-CP), tetramethylammonium (TMA), arsenite (As(111)), methylene blue (MB), and acid orange 7 (A07). The degradation (or conversion) of all six substrates was successfully achieved with Pt/WO3 and the role of OH radicals in Pt/WO3 photocatalysis seemed to be different depending on the kind of substrate. In the presence of tert-butyl alcohol (TBA: OH radical scavenger), the photocatalytic degradation was markedly reduced for 4-CP or completely inhibited for DCA and TMA whereas that of As(III), MB, and A07 was little affected. Pt/WO3 photocatalyst that oxidizes various substrates under visible light with a sufficient photostability can be applied for solar water treatment. | - |
dc.description.statementofresponsibility | X | - |
dc.language | English | - |
dc.publisher | AMER CHEMICAL SOC | - |
dc.relation.isPartOf | ENVIRONMENTAL SCIENCE & TECHNOLOGY | - |
dc.subject | TIO2 PHOTOCATALYSTS | - |
dc.subject | TUNGSTEN-OXIDE | - |
dc.subject | DRIVEN PHOTOCATALYSTS | - |
dc.subject | ELECTRON-ACCEPTORS | - |
dc.subject | HYDROGEN-PEROXIDE | - |
dc.subject | ORGANIC-COMPOUNDS | - |
dc.subject | OXIDATION | - |
dc.subject | DECOMPOSITION | - |
dc.subject | IRRADIATION | - |
dc.subject | SUPEROXIDE | - |
dc.title | Platinized WO3 as an Environmental Photocatalyst that Generates OH Radicals under Visible Light | - |
dc.type | Article | - |
dc.contributor.college | 환경공학부 | - |
dc.identifier.doi | 10.1021/ES101981R | - |
dc.author.google | Kim, J | - |
dc.author.google | Lee, CW | - |
dc.author.google | Choi, W | - |
dc.relation.volume | 44 | - |
dc.relation.issue | 17 | - |
dc.relation.startpage | 6849 | - |
dc.relation.lastpage | 6854 | - |
dc.contributor.id | 10105056 | - |
dc.relation.journal | ENVIRONMENTAL SCIENCE & TECHNOLOGY | - |
dc.relation.index | SCI급, SCOPUS 등재논문 | - |
dc.relation.sci | SCI | - |
dc.collections.name | Journal Papers | - |
dc.type.rims | ART | - |
dc.identifier.bibliographicCitation | ENVIRONMENTAL SCIENCE & TECHNOLOGY, v.44, no.17, pp.6849 - 6854 | - |
dc.identifier.wosid | 000281225800049 | - |
dc.date.tcdate | 2019-02-01 | - |
dc.citation.endPage | 6854 | - |
dc.citation.number | 17 | - |
dc.citation.startPage | 6849 | - |
dc.citation.title | ENVIRONMENTAL SCIENCE & TECHNOLOGY | - |
dc.citation.volume | 44 | - |
dc.contributor.affiliatedAuthor | Choi, W | - |
dc.identifier.scopusid | 2-s2.0-77956149941 | - |
dc.description.journalClass | 1 | - |
dc.description.journalClass | 1 | - |
dc.description.wostc | 381 | - |
dc.description.scptc | 346 | * |
dc.date.scptcdate | 2018-05-121 | * |
dc.type.docType | Article | - |
dc.subject.keywordPlus | TIO2 PHOTOCATALYSTS | - |
dc.subject.keywordPlus | TUNGSTEN-OXIDE | - |
dc.subject.keywordPlus | DRIVEN PHOTOCATALYSTS | - |
dc.subject.keywordPlus | ELECTRON-ACCEPTORS | - |
dc.subject.keywordPlus | HYDROGEN-PEROXIDE | - |
dc.subject.keywordPlus | ORGANIC-COMPOUNDS | - |
dc.subject.keywordPlus | OXIDATION | - |
dc.subject.keywordPlus | DECOMPOSITION | - |
dc.subject.keywordPlus | IRRADIATION | - |
dc.subject.keywordPlus | SUPEROXIDE | - |
dc.relation.journalWebOfScienceCategory | Engineering, Environmental | - |
dc.relation.journalWebOfScienceCategory | Environmental Sciences | - |
dc.description.journalRegisteredClass | scie | - |
dc.description.journalRegisteredClass | scopus | - |
dc.relation.journalResearchArea | Engineering | - |
dc.relation.journalResearchArea | Environmental Sciences & Ecology | - |
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