Hydrophilicity Control of Visible-Light Hydrogen Evolution and Dynamics of the Charge-Separated State in Dye/TiO2/Pt Hybrid Systems
DC Field | Value | Language |
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dc.contributor.author | Han, Won-Sik | - |
dc.contributor.author | Wee, Kyung-Ryang | - |
dc.contributor.author | Kim, Hyun-Young | - |
dc.contributor.author | Pac, Chyongjin | - |
dc.contributor.author | Nabetani, Yu | - |
dc.contributor.author | Yamamoto, Daisuke | - |
dc.contributor.author | Shimada, Tetsuya | - |
dc.contributor.author | Inoue, Haruo | - |
dc.contributor.author | Choi, Heesung | - |
dc.contributor.author | Cho, Kyeongjae | - |
dc.contributor.author | Kang, Sang Ook | - |
dc.date.accessioned | 2021-09-06T14:05:35Z | - |
dc.date.available | 2021-09-06T14:05:35Z | - |
dc.date.created | 2021-06-14 | - |
dc.date.issued | 2012-11 | - |
dc.identifier.issn | 0947-6539 | - |
dc.identifier.uri | https://scholar.korea.ac.kr/handle/2021.sw.korea/107157 | - |
dc.description.abstract | Visible-light-driven H2 evolution based on Dye/TiO2/Pt hybrid photocatalysts was investigated for a series of (E)-3-(5'-{4-[bis(4-R1-phenyl)amino]phenyl}-4,4'-(R2)2-2,2'-bithiophen-5-yl)-2-cyanoacrylic acid dyes. Efficiencies of hydrogen evolution from aqueous suspensions in the presence of ethylenediaminetetraacetic acid as electron donor under illumination at lambda>420 nm were found to considerably depend on the hydrophilic character of R1, varying in the order MOD (R1=CH3OCH2, R2=H)approximate to MO4D (R1=R2=CH3OCH2)>HD (R1=R2=H)>PD (R1=C3H7, R2=H). In the case of MOD/TiO2/Pt, the apparent quantum yield for photocatalyzed H2 generation at 436 nm was 0.27 +/- 0.03. Transient absorption measurements for MOD- or PD-grafted transparent films of TiO2 nanoparticles dipped into water at pH 3 commonly revealed ultrafast formation (<100 fs) of the dye radical cation (Dye.+) followed by multicomponent decays, which involve minor fast decays (<5 ps) almost independent of R1 and major slower decays with significant differences between the two samples: 1) the early decay of the major components for MOD is about 2.5 times slower than that for PD and 2) a redshift of the spectrum occurred for MOD with a time constant of 17 ps, but not for PD. The substituent effects on H2 generation as well as on transient behavior have been discussed in terms substituent-dependent charge recombination (CR) of Dye.+ with electrons in bulk, inner-trap, and/or interstitial-trap states, arising from different solvent reorganization. | - |
dc.language | English | - |
dc.language.iso | en | - |
dc.publisher | WILEY-V C H VERLAG GMBH | - |
dc.subject | SENSITIZED SOLAR-CELLS | - |
dc.subject | DIFFUSE-REFLECTANCE SPECTROSCOPY | - |
dc.subject | NANOCRYSTALLINE TIO2 FILMS | - |
dc.subject | ARTIFICIAL PHOTOSYNTHESIS | - |
dc.subject | SOLVATION DYNAMICS | - |
dc.subject | ORGANIC-DYES | - |
dc.subject | ELECTRON INJECTION | - |
dc.subject | ENERGY-CONVERSION | - |
dc.subject | AQUEOUS-SOLUTIONS | - |
dc.subject | CLAY SURFACES | - |
dc.title | Hydrophilicity Control of Visible-Light Hydrogen Evolution and Dynamics of the Charge-Separated State in Dye/TiO2/Pt Hybrid Systems | - |
dc.type | Article | - |
dc.contributor.affiliatedAuthor | Kang, Sang Ook | - |
dc.identifier.doi | 10.1002/chem.201201500 | - |
dc.identifier.scopusid | 2-s2.0-84869422039 | - |
dc.identifier.wosid | 000311306700022 | - |
dc.identifier.bibliographicCitation | CHEMISTRY-A EUROPEAN JOURNAL, v.18, no.48, pp.15368 - 15381 | - |
dc.relation.isPartOf | CHEMISTRY-A EUROPEAN JOURNAL | - |
dc.citation.title | CHEMISTRY-A EUROPEAN JOURNAL | - |
dc.citation.volume | 18 | - |
dc.citation.number | 48 | - |
dc.citation.startPage | 15368 | - |
dc.citation.endPage | 15381 | - |
dc.type.rims | ART | - |
dc.type.docType | Article | - |
dc.description.journalClass | 1 | - |
dc.description.journalRegisteredClass | scie | - |
dc.description.journalRegisteredClass | scopus | - |
dc.relation.journalResearchArea | Chemistry | - |
dc.relation.journalWebOfScienceCategory | Chemistry, Multidisciplinary | - |
dc.subject.keywordPlus | SENSITIZED SOLAR-CELLS | - |
dc.subject.keywordPlus | DIFFUSE-REFLECTANCE SPECTROSCOPY | - |
dc.subject.keywordPlus | NANOCRYSTALLINE TIO2 FILMS | - |
dc.subject.keywordPlus | ARTIFICIAL PHOTOSYNTHESIS | - |
dc.subject.keywordPlus | SOLVATION DYNAMICS | - |
dc.subject.keywordPlus | ORGANIC-DYES | - |
dc.subject.keywordPlus | ELECTRON INJECTION | - |
dc.subject.keywordPlus | ENERGY-CONVERSION | - |
dc.subject.keywordPlus | AQUEOUS-SOLUTIONS | - |
dc.subject.keywordPlus | CLAY SURFACES | - |
dc.subject.keywordAuthor | charge transfer | - |
dc.subject.keywordAuthor | dyes/pigments | - |
dc.subject.keywordAuthor | hydrogen | - |
dc.subject.keywordAuthor | photosynthesis | - |
dc.subject.keywordAuthor | water chemistry | - |
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