DC Field | Value | Language |
---|---|---|
dc.contributor.author | Silva, LA | - |
dc.contributor.author | Ryu, SY | - |
dc.contributor.author | Choi, J | - |
dc.contributor.author | Choi, W | - |
dc.contributor.author | Hoffmann, MR | - |
dc.date.accessioned | 2016-04-01T03:12:25Z | - |
dc.date.available | 2016-04-01T03:12:25Z | - |
dc.date.created | 2010-04-14 | - |
dc.date.issued | 2008-08-14 | - |
dc.identifier.issn | 1932-7447 | - |
dc.identifier.other | 2008-OAK-0000020520 | - |
dc.identifier.uri | https://oasis.postech.ac.kr/handle/2014.oak/26388 | - |
dc.description.abstract | A hybrid photocatalytic system, which is based on a mixed-phase cadmium sulfide matrix composed of nanoparticulate cubic-phase CdS (c-CdS) with average particle diameters of 13 nm and a bandgap energy of 2.6 eV, is coupled with bulk-phase hexagonal US (hex-CdS) that has a bandgap energy of 2.3 eV and is interlinked with elemental platinum deposits. The resulting hybrid nanocomposite catalysts are photocatalytically efficient with respect to hydrogen gas production from water with visible light irradiation at lambda > 420 nm. Rates of H-2 production approaching 1.0 mmol-H-2 g(-1) h(-1) are obtained with a c-CdS/Pt/hex-CdS composite photocatalyst, in the presence of a mixed sodium sulfide and sodium sulfite background electrolyte system at pH 14. In contrast, the same composite produces H-2 a rate of 0.15 mmol g(-1) h(-1) at pH 7 in a water-isopropanol solvent system. The relative order of reactivity for the synthesized hybrid catalysts was found to be c-CdS/Pt/hex-CdS > Pt/c-CdS/hex-CdS > Pt/hex-CdS > hex-CdS > c-CdS/hex-CdS > quantum-sized c-CdS. A mechanism involving enhanced lifetimes of electron-hole trapping states that are dependent on the surface chemistry of hydrated US involving surface hydroxyl (> CdOH) and sulfhydryl groups (> CdSH) are invoked. | - |
dc.description.statementofresponsibility | X | - |
dc.language | English | - |
dc.publisher | AMER CHEMICAL SOC | - |
dc.relation.isPartOf | JOURNAL OF PHYSICAL CHEMISTRY C | - |
dc.subject | POLYMERIZATION | - |
dc.subject | MECHANISM | - |
dc.subject | CATALYST | - |
dc.subject | COLLOIDS | - |
dc.subject | SULFIDE | - |
dc.subject | TIO2 | - |
dc.subject | H-2 | - |
dc.title | Photocatalytic hydrogen production with visible light over Pt-interlinked hybrid composites of cubic-phase and hexagonal-phase CdS | - |
dc.type | Article | - |
dc.contributor.college | 환경공학부 | - |
dc.identifier.doi | 10.1021/JP8037279 | - |
dc.author.google | Silva, LA | - |
dc.author.google | Ryu, SY | - |
dc.author.google | Choi, J | - |
dc.author.google | Choi, W | - |
dc.author.google | Hoffmann, MR | - |
dc.relation.volume | 112 | - |
dc.relation.issue | 32 | - |
dc.relation.startpage | 12069 | - |
dc.relation.lastpage | 12073 | - |
dc.contributor.id | 10105056 | - |
dc.relation.journal | JOURNAL OF PHYSICAL CHEMISTRY C | - |
dc.relation.index | SCI급, SCOPUS 등재논문 | - |
dc.relation.sci | SCI | - |
dc.collections.name | Journal Papers | - |
dc.type.rims | ART | - |
dc.identifier.bibliographicCitation | JOURNAL OF PHYSICAL CHEMISTRY C, v.112, no.32, pp.12069 - 12073 | - |
dc.identifier.wosid | 000258290100002 | - |
dc.date.tcdate | 2019-02-01 | - |
dc.citation.endPage | 12073 | - |
dc.citation.number | 32 | - |
dc.citation.startPage | 12069 | - |
dc.citation.title | JOURNAL OF PHYSICAL CHEMISTRY C | - |
dc.citation.volume | 112 | - |
dc.contributor.affiliatedAuthor | Choi, W | - |
dc.identifier.scopusid | 2-s2.0-50649110462 | - |
dc.description.journalClass | 1 | - |
dc.description.journalClass | 1 | - |
dc.description.wostc | 149 | - |
dc.description.scptc | 144 | * |
dc.date.scptcdate | 2018-05-121 | * |
dc.type.docType | Article | - |
dc.subject.keywordPlus | POLYMERIZATION | - |
dc.subject.keywordPlus | MECHANISM | - |
dc.subject.keywordPlus | SULFIDE | - |
dc.subject.keywordPlus | TIO2 | - |
dc.subject.keywordPlus | H-2 | - |
dc.relation.journalWebOfScienceCategory | Chemistry, Physical | - |
dc.relation.journalWebOfScienceCategory | Nanoscience & Nanotechnology | - |
dc.relation.journalWebOfScienceCategory | Materials Science, Multidisciplinary | - |
dc.description.journalRegisteredClass | scie | - |
dc.description.journalRegisteredClass | scopus | - |
dc.relation.journalResearchArea | Chemistry | - |
dc.relation.journalResearchArea | Science & Technology - Other Topics | - |
dc.relation.journalResearchArea | Materials Science | - |
Items in DSpace are protected by copyright, with all rights reserved, unless otherwise indicated.
library@postech.ac.kr Tel: 054-279-2548
Copyrights © by 2017 Pohang University of Science ad Technology All right reserved.