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Nanostructured TiO(2) anatase-rutile-carbon solid coating with visible light antimicrobial activity

TiO(2) photocatalyst is of interest for antimicrobial coatings on hospital touch-surfaces. Recent research has focused on visible spectrum enhancement of photocatalytic activity. Here, we report TiO(2) with a high degree of nanostructure, deposited on stainless steel as a solid layer more than 10 μm...

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Autores principales: Krumdieck, Susan P., Boichot, Raphaël, Gorthy, Rukmini, Land, Johann G., Lay, Sabine, Gardecka, Aleksandra J., Polson, Matthew I. J., Wasa, Alibe, Aitken, Jack E., Heinemann, Jack A., Renou, Gilles, Berthomé, Grégory, Charlot, Frédéric, Encinas, Thierry, Braccini, Muriel, Bishop, Catherine M.
Formato: Online Artículo Texto
Lenguaje:English
Publicado: Nature Publishing Group UK 2019
Materias:
Acceso en línea:https://www.ncbi.nlm.nih.gov/pmc/articles/PMC6374394/
https://www.ncbi.nlm.nih.gov/pubmed/30760788
http://dx.doi.org/10.1038/s41598-018-38291-y
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author Krumdieck, Susan P.
Boichot, Raphaël
Gorthy, Rukmini
Land, Johann G.
Lay, Sabine
Gardecka, Aleksandra J.
Polson, Matthew I. J.
Wasa, Alibe
Aitken, Jack E.
Heinemann, Jack A.
Renou, Gilles
Berthomé, Grégory
Charlot, Frédéric
Encinas, Thierry
Braccini, Muriel
Bishop, Catherine M.
author_facet Krumdieck, Susan P.
Boichot, Raphaël
Gorthy, Rukmini
Land, Johann G.
Lay, Sabine
Gardecka, Aleksandra J.
Polson, Matthew I. J.
Wasa, Alibe
Aitken, Jack E.
Heinemann, Jack A.
Renou, Gilles
Berthomé, Grégory
Charlot, Frédéric
Encinas, Thierry
Braccini, Muriel
Bishop, Catherine M.
author_sort Krumdieck, Susan P.
collection PubMed
description TiO(2) photocatalyst is of interest for antimicrobial coatings on hospital touch-surfaces. Recent research has focused on visible spectrum enhancement of photocatalytic activity. Here, we report TiO(2) with a high degree of nanostructure, deposited on stainless steel as a solid layer more than 10 μm thick by pulsed-pressure-MOCVD. The TiO(2) coating exhibits a rarely-reported microstructure comprising anatase and rutile in a composite with amorphous carbon. Columnar anatase single crystals are segmented into 15–20 nm thick plates, resulting in a mille-feuilles nanostructure. Polycrystalline rutile columns exhibit dendrite generation resembling pine tree strobili. We propose that high growth rate and co-deposition of carbon contribute to formation of the unique nanostructures. High vapor flux produces step-edge instabilities in the TiO(2), and solid carbon preferentially co-deposits on certain high energy facets. The equivalent effective surface area of the nanostructured coating is estimated to be 100 times higher than standard TiO(2) coatings and powders. The coatings prepared on stainless steel showed greater than 3-log reduction in viable E coli after 4 hours visible light exposure. The pp-MOCVD approach could represent an up-scalable manufacturing route for supported catalysts of functional nanostructured materials without having to make nanoparticles.
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spelling pubmed-63743942019-02-19 Nanostructured TiO(2) anatase-rutile-carbon solid coating with visible light antimicrobial activity Krumdieck, Susan P. Boichot, Raphaël Gorthy, Rukmini Land, Johann G. Lay, Sabine Gardecka, Aleksandra J. Polson, Matthew I. J. Wasa, Alibe Aitken, Jack E. Heinemann, Jack A. Renou, Gilles Berthomé, Grégory Charlot, Frédéric Encinas, Thierry Braccini, Muriel Bishop, Catherine M. Sci Rep Article TiO(2) photocatalyst is of interest for antimicrobial coatings on hospital touch-surfaces. Recent research has focused on visible spectrum enhancement of photocatalytic activity. Here, we report TiO(2) with a high degree of nanostructure, deposited on stainless steel as a solid layer more than 10 μm thick by pulsed-pressure-MOCVD. The TiO(2) coating exhibits a rarely-reported microstructure comprising anatase and rutile in a composite with amorphous carbon. Columnar anatase single crystals are segmented into 15–20 nm thick plates, resulting in a mille-feuilles nanostructure. Polycrystalline rutile columns exhibit dendrite generation resembling pine tree strobili. We propose that high growth rate and co-deposition of carbon contribute to formation of the unique nanostructures. High vapor flux produces step-edge instabilities in the TiO(2), and solid carbon preferentially co-deposits on certain high energy facets. The equivalent effective surface area of the nanostructured coating is estimated to be 100 times higher than standard TiO(2) coatings and powders. The coatings prepared on stainless steel showed greater than 3-log reduction in viable E coli after 4 hours visible light exposure. The pp-MOCVD approach could represent an up-scalable manufacturing route for supported catalysts of functional nanostructured materials without having to make nanoparticles. Nature Publishing Group UK 2019-02-13 /pmc/articles/PMC6374394/ /pubmed/30760788 http://dx.doi.org/10.1038/s41598-018-38291-y Text en © The Author(s) 2019 Open Access This article is licensed under a Creative Commons Attribution 4.0 International License, which permits use, sharing, adaptation, distribution and reproduction in any medium or format, as long as you give appropriate credit to the original author(s) and the source, provide a link to the Creative Commons license, and indicate if changes were made. The images or other third party material in this article are included in the article’s Creative Commons license, unless indicated otherwise in a credit line to the material. If material is not included in the article’s Creative Commons license and your intended use is not permitted by statutory regulation or exceeds the permitted use, you will need to obtain permission directly from the copyright holder. To view a copy of this license, visit http://creativecommons.org/licenses/by/4.0/.
spellingShingle Article
Krumdieck, Susan P.
Boichot, Raphaël
Gorthy, Rukmini
Land, Johann G.
Lay, Sabine
Gardecka, Aleksandra J.
Polson, Matthew I. J.
Wasa, Alibe
Aitken, Jack E.
Heinemann, Jack A.
Renou, Gilles
Berthomé, Grégory
Charlot, Frédéric
Encinas, Thierry
Braccini, Muriel
Bishop, Catherine M.
Nanostructured TiO(2) anatase-rutile-carbon solid coating with visible light antimicrobial activity
title Nanostructured TiO(2) anatase-rutile-carbon solid coating with visible light antimicrobial activity
title_full Nanostructured TiO(2) anatase-rutile-carbon solid coating with visible light antimicrobial activity
title_fullStr Nanostructured TiO(2) anatase-rutile-carbon solid coating with visible light antimicrobial activity
title_full_unstemmed Nanostructured TiO(2) anatase-rutile-carbon solid coating with visible light antimicrobial activity
title_short Nanostructured TiO(2) anatase-rutile-carbon solid coating with visible light antimicrobial activity
title_sort nanostructured tio(2) anatase-rutile-carbon solid coating with visible light antimicrobial activity
topic Article
url https://www.ncbi.nlm.nih.gov/pmc/articles/PMC6374394/
https://www.ncbi.nlm.nih.gov/pubmed/30760788
http://dx.doi.org/10.1038/s41598-018-38291-y
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