dc.contributor.author |
Nolan, Michael |
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dc.contributor.author |
Iwaszuk, Anna |
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dc.contributor.author |
Tada, Hiroaki |
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dc.date.accessioned |
2017-12-19T14:41:26Z |
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dc.date.available |
2017-12-19T14:41:26Z |
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dc.date.issued |
2012-01 |
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dc.identifier.citation |
Nolan, M., Iwaszuk, A. and Tada, H. (2012) 'Molecular metal oxide cluster-surface modified titanium (IV) dioxide photocatalysts', Australian Journal of Chemistry, 65(6), pp. 624-632. doi: 10.1071/CH11451 |
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dc.identifier.volume |
65 |
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dc.identifier.startpage |
624 |
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dc.identifier.endpage |
632 |
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dc.identifier.issn |
0004-9425 |
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dc.identifier.uri |
http://hdl.handle.net/10468/5197 |
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dc.identifier.doi |
10.1071/CH11451 |
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dc.description.abstract |
The surface modification of TiO2 with molecular sized metal oxide clusters has recently been shown to be a promising approach for providing TiO2 with visible-light activity and/or improved UV activity. This short review summarizes the effects of the surface modification of TiO2 with the oxides of iron and tin selected from d- and p-blocks, respectively, on the photocatalytic activity. Fe(acac)(3) and [Sn(acac)(2)]Cl-2 chemisorption on the TiO2 surface occurs by ligand-exchange and ion-exchange, respectively. Taking advantage of the strong adsorption, we formed extremely small metal oxide clusters on TiO2 by the chemisorption-calcination cycle (CCC) technique with their loading amount strictly controlled. The iron oxide surface modification of P-25 (anatase/rutile = 4: 1, w/w, Degussa) gives rise to a high level of visible-light activity and a concomitant increase in the UV-light activity for the degradation of model organic pollutants. On the other hand, only the UV-light activity is increased by the tin oxide surface modification of ST-01 (anatase, Ishihara Sangyo). This striking difference can be rationalized on the basis of the material characterization and DFT calculations, which show that FeOx surface modification of rutile leads to visible-light activity, while SnO2-modified anatase enhances only the UV-light activity. We propose the mechanisms behind the FeOx and SnO2 surface modification, where the surface-to-bulk and bulk-to-surface interfacial electron transfer are taken into account in the former and the latter, respectively. |
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dc.description.abstract |
Research Front (Open Access) |
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dc.description.sponsorship |
Science Foundation Ireland and Higher Education Authority (Irish Centre for High End Computing) |
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dc.format.mimetype |
application/pdf |
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dc.language.iso |
en |
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dc.publisher |
CSIRO Publishing |
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dc.rights |
© CSIRO 2012. |
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dc.subject |
Bilayer-type photocatalyst |
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dc.subject |
Visible-light photocatalysis |
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dc.subject |
TiO2 photocatalysis |
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dc.subject |
Band-gap |
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dc.subject |
Semiconductor |
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dc.subject |
Irradiation |
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dc.subject |
Transition |
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dc.subject |
Particles |
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dc.subject |
Anatase |
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dc.subject |
Design |
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dc.subject |
Adsorption |
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dc.subject |
Chemisorption |
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dc.subject |
Degradation |
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dc.subject |
Density functional theory |
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dc.subject |
Ion exchange |
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dc.subject |
Iron oxides |
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dc.subject |
Loading |
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dc.subject |
Metallic compounds |
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dc.subject |
Organic conductors |
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dc.subject |
Oxide minerals |
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dc.subject |
Photocatalysis |
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dc.subject |
Photocatalysts |
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dc.subject |
Surfaces |
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dc.subject |
Tin |
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dc.subject |
Tin oxides |
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dc.subject |
Titanium |
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dc.title |
Molecular metal oxide cluster-surface modified titanium (IV) dioxide photocatalysts |
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dc.type |
Article (peer-reviewed) |
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dc.internal.authorcontactother |
Michael Nolan, Tyndall Theory Modelling & Design Centre, University College Cork, Cork, Ireland. +353-21-490-3000 Email: michael.nolan@tyndall.ie |
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dc.internal.availability |
Full text available |
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dc.date.updated |
2017-12-19T12:54:50Z |
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dc.description.version |
Published Version |
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dc.internal.rssid |
160956727 |
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dc.internal.wokid |
000305505800010 |
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dc.contributor.funder |
Science Foundation Ireland
|
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dc.contributor.funder |
Higher Education Authority
|
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dc.description.status |
Peer reviewed |
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dc.identifier.journaltitle |
Australian Journal Of Chemistry |
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dc.internal.copyrightchecked |
No !!CORA!! |
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dc.internal.licenseacceptance |
Yes |
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dc.internal.IRISemailaddress |
michael.nolan@tyndall.ie |
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dc.relation.project |
info:eu-repo/grantAgreement/SFI/SFI Starting Investigator Research Grant (SIRG)/09/SIRG/I1620/IE/EMOIN: Engineering Metal Oxide Interfaces For Renewable Energy Photocatalysis/
|
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