Photocatalysis of dye-sensitized TiO2 nanoparticles with thin overcoat of Al2O3: Enhanced activity for H2 production and dechlorination of CCl4
DC Field | Value | Language |
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dc.contributor.author | Kim, W. | - |
dc.contributor.author | Tachikawa, T. | - |
dc.contributor.author | Majima, T. | - |
dc.contributor.author | Choi, W. | - |
dc.date.accessioned | 2023-12-18T11:31:12Z | - |
dc.date.available | 2023-12-18T11:31:12Z | - |
dc.date.issued | 2009-06 | - |
dc.identifier.issn | 1932-7447 | - |
dc.identifier.issn | 1932-7455 | - |
dc.identifier.uri | https://scholarworks.sookmyung.ac.kr/handle/2020.sw.sookmyung/159261 | - |
dc.description.abstract | Dye-sensitized TiO2 nanoparticles that were loaded simultaneously with Pt and Al2O3 overlayer (Al2(VTi(V Pt) were synthesized and investigated for photocatalytic activity under visible light. Introducing a thin Al2O3 overlayer (∼1 nm thick) on dye-sensitized TiO2 markedly enhanced the visible light activities for the production of hydrogen (in the presence of EDTA as an electron donor) and the dechlorination of CCl4. The Al2(V TiO2/Pt powder was characterized by HRTEM, EDX, and XPS. In agreement with the photocatalytic activity data, the photocurrent collected via electron shuttles on a Pt electrode immersed in an aqueous photocatalyst suspension under visible light was also enhanced in the presence of an Al2O 3 overlayer, which indicates an enhanced interfacial electron transfer despite the presence of an insulating surface layer. The initial H2 and chloride generation rate increased from 0.4 and 5 ΜM min on TiO2/Pt to 0.9 and 7.5 ΜM min on Al2O 3/ TiO2/Pt, respectively. The visible light activity of the sensitized photocatalytic reactions highly depended on the thickness of the alumina layer and was optimized at a low level of Al loading (Al/Ti atom ratio ∼ 0.01), above which the activity was markedly reduced with thickening of the layer. It is suggested that the alumina layer retards the charge recombination | - |
dc.format.extent | 7 | - |
dc.language | 영어 | - |
dc.language.iso | ENG | - |
dc.publisher | American Chemical Society | - |
dc.title | Photocatalysis of dye-sensitized TiO2 nanoparticles with thin overcoat of Al2O3: Enhanced activity for H2 production and dechlorination of CCl4 | - |
dc.type | Article | - |
dc.publisher.location | 미국 | - |
dc.identifier.doi | 10.1021/jp9008114 | - |
dc.identifier.scopusid | 2-s2.0-67650713969 | - |
dc.identifier.wosid | 000266930400045 | - |
dc.identifier.bibliographicCitation | Journal of Physical Chemistry C, v.113, no.24, pp 10603 - 10609 | - |
dc.citation.title | Journal of Physical Chemistry C | - |
dc.citation.volume | 113 | - |
dc.citation.number | 24 | - |
dc.citation.startPage | 10603 | - |
dc.citation.endPage | 10609 | - |
dc.description.isOpenAccess | N | - |
dc.description.journalRegisteredClass | scie | - |
dc.description.journalRegisteredClass | scopus | - |
dc.identifier.url | https://pubs.acs.org/doi/10.1021/jp9008114 | - |
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