dc.contributor.author |
Mathew, Snehamol |
|
dc.contributor.author |
Ganguly, Priyanka |
|
dc.contributor.author |
Rhatigan, Stephen |
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dc.contributor.author |
Kumaravel, Vignesh |
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dc.contributor.author |
Byrne, Ciara |
|
dc.contributor.author |
Hinder, Steven J. |
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dc.contributor.author |
Bartlett, John |
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dc.contributor.author |
Nolan, Michael |
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dc.contributor.author |
Pillai, Suresh C. |
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dc.date.accessioned |
2019-09-02T14:36:13Z |
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dc.date.available |
2019-09-02T14:36:13Z |
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dc.date.issued |
2018-10-26 |
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dc.identifier.citation |
Mathew, S., Ganguly, P., Rhatigan, S., Kumaravel, V., Byrne, C., Hinder, S., Bartlett, J., Nolan, M. and Pillai, S., 2018. Cu-doped TiO2: visible light assisted photocatalytic antimicrobial activity. Applied Sciences, 8(11), (2067). DOI:10.3390/app8112067 |
en |
dc.identifier.volume |
8 |
en |
dc.identifier.issued |
11 |
en |
dc.identifier.startpage |
1 |
en |
dc.identifier.endpage |
20 |
en |
dc.identifier.issn |
2076-3417 |
|
dc.identifier.uri |
http://hdl.handle.net/10468/8433 |
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dc.identifier.doi |
10.3390/app8112067 |
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dc.description.abstract |
Surface contamination by microbes is a major public health concern. A damp environment is one of potential sources for microbe proliferation. Smart photocatalytic coatings on building surfaces using semiconductors like titania (TiO2) can effectively curb this growing threat. Metal-doped titania in anatase phase has been proven as a promising candidate for energy and environmental applications. In this present work, the antimicrobial efficacy of copper (Cu)-doped TiO2 (Cu-TiO2) was evaluated against Escherichia coli (Gram-negative) and Staphylococcus aureus (Gram-positive) under visible light irradiation. Doping of a minute fraction of Cu (0.5 mol %) in TiO2 was carried out via sol-gel technique. Cu-TiO2 further calcined at various temperatures (in the range of 500–700 °C) to evaluate the thermal stability of TiO2 anatase phase. The physico-chemical properties of the samples were characterized through X-ray diffraction (XRD), Raman spectroscopy, X-ray photo-electron spectroscopy (XPS) and UV–visible spectroscopy techniques. XRD results revealed that the anatase phase of TiO2 was maintained well, up to 650 °C, by the Cu dopant. UV–vis results suggested that the visible light absorption property of Cu-TiO2 was enhanced and the band gap is reduced to 2.8 eV. Density functional theory (DFT) studies emphasize the introduction of Cu+ and Cu2+ ions by replacing Ti4+ ions in the TiO2 lattice, creating oxygen vacancies. These further promoted the photocatalytic efficiency. A significantly high bacterial inactivation (99.9999%) was attained in 30 min of visible light irradiation by Cu-TiO2. |
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dc.description.sponsorship |
IVA5033; PPRES052; PPRES032; SFI/US/14/e2915; SFI/16/M-ERA/3418 |
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dc.format.mimetype |
application/pdf |
en |
dc.language.iso |
en |
en |
dc.publisher |
MDPI AG |
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dc.relation.uri |
https://www.mdpi.com/2076-3417/8/11/2067 |
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dc.rights |
© 2018 by the authors. Licensee MDPI, Basel, Switzerland |
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dc.rights.uri |
https://creativecommons.org/licenses/by/4.0/ |
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dc.subject |
Cu-doped TiO2 |
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dc.subject |
Doping |
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dc.subject |
Phase transition |
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dc.subject |
Escherichia coli |
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dc.subject |
Staphylococcus aureus |
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dc.subject |
Photocatalysis |
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dc.subject |
Antibacterial coatings |
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dc.title |
Cu-Doped TiO2: Visible light assisted photocatalytic antimicrobial activity |
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dc.type |
Article (peer-reviewed) |
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dc.internal.authorcontactother |
Michael Nolan, Tyndall National Institute, 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.description.version |
Published Version |
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dc.contributor.funder |
European Union INTERREG VA |
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dc.contributor.funder |
Department of Jobs, Enterprise and Innovation
|
en |
dc.contributor.funder |
Department for the Economy (DfE) |
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dc.contributor.funder |
Institute of Technology Sligo |
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dc.contributor.funder |
Science Foundation Ireland
|
en |
dc.contributor.funder |
Horizon 2020
|
en |
dc.description.status |
Peer reviewed |
en |
dc.identifier.journaltitle |
Applied Sciences (Switzerland) |
en |
dc.internal.IRISemailaddress |
michael.nolan@tyndall.ie |
en |
dc.identifier.articleid |
2067 |
en |
dc.relation.project |
info:eu-repo/grantAgreement/EC/H2020::ERA-NET-Cofund/685451/EU/ERA-NET for materials research and innovation/M-ERA.NET 2
|
en |