Photocatalytic Activity of Titanium Dioxide Nanotubes Following Long-Term Aging

Anodic titanium dioxide (TiO<sub>2</sub>) nanotubes were found to be active photocatalysts. These photocatalysts possess a high surface area, even when supported, rendering them potential candidates for water treatment. In this work, photocatalytic surfaces were produced by anodizing com...

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Autores principales:	Stephen Abela, Clayton Farrugia, Ryan Xuereb, Frederick Lia, Edwin Zammit, Alex Rizzo, Paul Refalo, Maurice Grech
Formato:	article
Lenguaje:	EN
Publicado:	MDPI AG 2021
Materias:	photocatalytic surface long-term aging reactivation Chemistry QD1-999
Acceso en línea:	https://doaj.org/article/3afe263f85164c0383d991be0ee7b361
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spelling	oai:doaj.org-article:3afe263f85164c0383d991be0ee7b3612021-11-25T18:30:05ZPhotocatalytic Activity of Titanium Dioxide Nanotubes Following Long-Term Aging10.3390/nano111128232079-4991https://doaj.org/article/3afe263f85164c0383d991be0ee7b3612021-10-01T00:00:00Zhttps://www.mdpi.com/2079-4991/11/11/2823https://doaj.org/toc/2079-4991Anodic titanium dioxide (TiO<sub>2</sub>) nanotubes were found to be active photocatalysts. These photocatalysts possess a high surface area, even when supported, rendering them potential candidates for water treatment. In this work, photocatalytic surfaces were produced by anodizing commercially pure Ti plates using two different electrolyte compositions and correspondingly diverse process parameters. Changes in the physical and chemical stability as well as photocatalytic activity were studied over a fifty-two-week aging process. During this period, the nanotubular surfaces were exposed to flowing synthetic greywater, solar irradiation, and the natural environment. The physical and phase stability of the materials anodized using the organic electrolyte were found to be outstanding and no degradation or change in crystalline structure was observed. On the other hand, materials anodized in the aqueous electrolyte proved to suffer from light-induced phase transition from anatase to rutile. Surfaces synthesized in the organic electrolyte were more resistant to fouling and showed a better tendency to recover photocatalytic activity upon cleaning. In conclusion, the nanotubes produced in the organic electrolyte proved to be stable, rendering them potentially suitable for real-life applications.Stephen AbelaClayton FarrugiaRyan XuerebFrederick LiaEdwin ZammitAlex RizzoPaul RefaloMaurice GrechMDPI AGarticlephotocatalytic surfacelong-term agingreactivationChemistryQD1-999ENNanomaterials, Vol 11, Iss 2823, p 2823 (2021)
institution	DOAJ
collection	DOAJ
language	EN
topic	photocatalytic surface long-term aging reactivation Chemistry QD1-999
spellingShingle	photocatalytic surface long-term aging reactivation Chemistry QD1-999 Stephen Abela Clayton Farrugia Ryan Xuereb Frederick Lia Edwin Zammit Alex Rizzo Paul Refalo Maurice Grech Photocatalytic Activity of Titanium Dioxide Nanotubes Following Long-Term Aging
description	Anodic titanium dioxide (TiO<sub>2</sub>) nanotubes were found to be active photocatalysts. These photocatalysts possess a high surface area, even when supported, rendering them potential candidates for water treatment. In this work, photocatalytic surfaces were produced by anodizing commercially pure Ti plates using two different electrolyte compositions and correspondingly diverse process parameters. Changes in the physical and chemical stability as well as photocatalytic activity were studied over a fifty-two-week aging process. During this period, the nanotubular surfaces were exposed to flowing synthetic greywater, solar irradiation, and the natural environment. The physical and phase stability of the materials anodized using the organic electrolyte were found to be outstanding and no degradation or change in crystalline structure was observed. On the other hand, materials anodized in the aqueous electrolyte proved to suffer from light-induced phase transition from anatase to rutile. Surfaces synthesized in the organic electrolyte were more resistant to fouling and showed a better tendency to recover photocatalytic activity upon cleaning. In conclusion, the nanotubes produced in the organic electrolyte proved to be stable, rendering them potentially suitable for real-life applications.
format	article
author	Stephen Abela Clayton Farrugia Ryan Xuereb Frederick Lia Edwin Zammit Alex Rizzo Paul Refalo Maurice Grech
author_facet	Stephen Abela Clayton Farrugia Ryan Xuereb Frederick Lia Edwin Zammit Alex Rizzo Paul Refalo Maurice Grech
author_sort	Stephen Abela
title	Photocatalytic Activity of Titanium Dioxide Nanotubes Following Long-Term Aging
title_short	Photocatalytic Activity of Titanium Dioxide Nanotubes Following Long-Term Aging
title_full	Photocatalytic Activity of Titanium Dioxide Nanotubes Following Long-Term Aging
title_fullStr	Photocatalytic Activity of Titanium Dioxide Nanotubes Following Long-Term Aging
title_full_unstemmed	Photocatalytic Activity of Titanium Dioxide Nanotubes Following Long-Term Aging
title_sort	photocatalytic activity of titanium dioxide nanotubes following long-term aging
publisher	MDPI AG
publishDate	2021
url	https://doaj.org/article/3afe263f85164c0383d991be0ee7b361
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Photocatalytic Activity of Titanium Dioxide Nanotubes Following Long-Term Aging

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