Formation of a photocatalytic WO(3) surface layer on electrodeposited Al–W alloy coatings by selective dissolution and heat treatment

In this study, we explored the feasibility of WO(3) surface layer formation on electrodeposited Al–W alloy coatings by selective dissolution and heat treatment, with the aim of providing corrosion-resistant Al–W alloy coatings with photocatalytic self-cleaning properties under visible light illumina...

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Autores principales: Higashino, Shota, Miyake, Masao, Ikenoue, Takumi, Hirato, Tetsuji
Formato: Online Artículo Texto
Lenguaje:English
Publicado: Nature Publishing Group UK 2019
Materias:
Article
Acceso en línea:https://www.ncbi.nlm.nih.gov/pmc/articles/PMC6831697/
https://www.ncbi.nlm.nih.gov/pubmed/31690727
http://dx.doi.org/10.1038/s41598-019-52178-6
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author Higashino, Shota
Miyake, Masao
Ikenoue, Takumi
Hirato, Tetsuji
author_facet Higashino, Shota
Miyake, Masao
Ikenoue, Takumi
Hirato, Tetsuji
author_sort Higashino, Shota
collection PubMed
description In this study, we explored the feasibility of WO(3) surface layer formation on electrodeposited Al–W alloy coatings by selective dissolution and heat treatment, with the aim of providing corrosion-resistant Al–W alloy coatings with photocatalytic self-cleaning properties under visible light illumination. The selective dissolution of Al and oxidation of residual W was carried out by immersing Al–W alloy films in an aqueous solution of nitric acid. A nanostructured H(2)WO(4)·H(2)O surface layer was formed on the alloy film by this process. The H(2)WO(4)·H(2)O layer was dehydrated to WO(3) by heat treatment, yielding a multilayered WO(3)/Al–W alloy film with an approximately 300 nm thick WO(3) layer. The WO(3)/Al–W alloy film exhibited photocatalytic self-cleaning, as demonstrated by the photodegradation of stearic acid and methylene blue. We also confirmed that selective dissolution and heat treatment did not significantly diminish the corrosion resistance of the Al–W alloy films.
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spelling pubmed-68316972019-11-13 Formation of a photocatalytic WO(3) surface layer on electrodeposited Al–W alloy coatings by selective dissolution and heat treatment Higashino, Shota Miyake, Masao Ikenoue, Takumi Hirato, Tetsuji Sci Rep Article In this study, we explored the feasibility of WO(3) surface layer formation on electrodeposited Al–W alloy coatings by selective dissolution and heat treatment, with the aim of providing corrosion-resistant Al–W alloy coatings with photocatalytic self-cleaning properties under visible light illumination. The selective dissolution of Al and oxidation of residual W was carried out by immersing Al–W alloy films in an aqueous solution of nitric acid. A nanostructured H(2)WO(4)·H(2)O surface layer was formed on the alloy film by this process. The H(2)WO(4)·H(2)O layer was dehydrated to WO(3) by heat treatment, yielding a multilayered WO(3)/Al–W alloy film with an approximately 300 nm thick WO(3) layer. The WO(3)/Al–W alloy film exhibited photocatalytic self-cleaning, as demonstrated by the photodegradation of stearic acid and methylene blue. We also confirmed that selective dissolution and heat treatment did not significantly diminish the corrosion resistance of the Al–W alloy films. Nature Publishing Group UK 2019-11-05 /pmc/articles/PMC6831697/ /pubmed/31690727 http://dx.doi.org/10.1038/s41598-019-52178-6 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
Higashino, Shota
Miyake, Masao
Ikenoue, Takumi
Hirato, Tetsuji
Formation of a photocatalytic WO(3) surface layer on electrodeposited Al–W alloy coatings by selective dissolution and heat treatment
title Formation of a photocatalytic WO(3) surface layer on electrodeposited Al–W alloy coatings by selective dissolution and heat treatment
title_full Formation of a photocatalytic WO(3) surface layer on electrodeposited Al–W alloy coatings by selective dissolution and heat treatment
title_fullStr Formation of a photocatalytic WO(3) surface layer on electrodeposited Al–W alloy coatings by selective dissolution and heat treatment
title_full_unstemmed Formation of a photocatalytic WO(3) surface layer on electrodeposited Al–W alloy coatings by selective dissolution and heat treatment
title_short Formation of a photocatalytic WO(3) surface layer on electrodeposited Al–W alloy coatings by selective dissolution and heat treatment
title_sort formation of a photocatalytic wo(3) surface layer on electrodeposited al–w alloy coatings by selective dissolution and heat treatment
topic Article
url https://www.ncbi.nlm.nih.gov/pmc/articles/PMC6831697/
https://www.ncbi.nlm.nih.gov/pubmed/31690727
http://dx.doi.org/10.1038/s41598-019-52178-6
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