Characterization of structure and luminescence of titania nanotubes

The morphology, structural, and optical properties of porous titania layers prepared by electrochemical oxidation of Ti foils are studied as a function of technological conditions of preparation and post-electrochemical-oxidation thermal treatment. Ti foils were anodized in aqueous and non-aqueo...

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Autores principales:	Enachi, Mihail, Trofim, Viorel, Tighineanu, Ion, Ursachi, Veaceslav, Coseac, Valeriu
Formato:	article
Lenguaje:	EN
Publicado:	D.Ghitu Institute of Electronic Engineering and Nanotechnologies 2009
Materias:	Physics QC1-999 Electronics TK7800-8360
Acceso en línea:	https://doaj.org/article/bbd1120a6b61492ab0b5097a5bd887ef
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spelling	oai:doaj.org-article:bbd1120a6b61492ab0b5097a5bd887ef2021-11-21T12:05:25ZCharacterization of structure and luminescence of titania nanotubes 2537-63651810-648Xhttps://doaj.org/article/bbd1120a6b61492ab0b5097a5bd887ef2009-05-01T00:00:00Zhttps://mjps.nanotech.md/archive/2009/article/4115https://doaj.org/toc/1810-648Xhttps://doaj.org/toc/2537-6365The morphology, structural, and optical properties of porous titania layers prepared by electrochemical oxidation of Ti foils are studied as a function of technological conditions of preparation and post-electrochemical-oxidation thermal treatment. Ti foils were anodized in aqueous and non-aqueous HF and H PO solutions by applying various anodizing conditions. Titania nanotubes with diameters ranging from 30 nm to 250 nm with controlled length have been prepared. The influence of thermal treatment upon the structural properties of TiO nanotubes was investigated by means of X-ray diffraction analysis and Raman scattering. It was found that the as prepared samples are amorphous. As the annealing temperature increases to 300°C, an anatase structure is formed. Starting from 500°C, a rutile structure is produced which coexists with the anatase structure. A complete phase transition to the rutile structure occurs at 800°C. The luminescence from both anatase and rutile phases was observed at low temperatures. The origin of luminescence bands is discussed. Enachi, MihailTrofim, ViorelTighineanu, IonUrsachi, VeaceslavCoseac, ValeriuD.Ghitu Institute of Electronic Engineering and NanotechnologiesarticlePhysicsQC1-999ElectronicsTK7800-8360ENMoldavian Journal of the Physical Sciences, Vol 8, Iss 2, Pp 214-220 (2009)
institution	DOAJ
collection	DOAJ
language	EN
topic	Physics QC1-999 Electronics TK7800-8360
spellingShingle	Physics QC1-999 Electronics TK7800-8360 Enachi, Mihail Trofim, Viorel Tighineanu, Ion Ursachi, Veaceslav Coseac, Valeriu Characterization of structure and luminescence of titania nanotubes
description	The morphology, structural, and optical properties of porous titania layers prepared by electrochemical oxidation of Ti foils are studied as a function of technological conditions of preparation and post-electrochemical-oxidation thermal treatment. Ti foils were anodized in aqueous and non-aqueous HF and H PO solutions by applying various anodizing conditions. Titania nanotubes with diameters ranging from 30 nm to 250 nm with controlled length have been prepared. The influence of thermal treatment upon the structural properties of TiO nanotubes was investigated by means of X-ray diffraction analysis and Raman scattering. It was found that the as prepared samples are amorphous. As the annealing temperature increases to 300°C, an anatase structure is formed. Starting from 500°C, a rutile structure is produced which coexists with the anatase structure. A complete phase transition to the rutile structure occurs at 800°C. The luminescence from both anatase and rutile phases was observed at low temperatures. The origin of luminescence bands is discussed.
format	article
author	Enachi, Mihail Trofim, Viorel Tighineanu, Ion Ursachi, Veaceslav Coseac, Valeriu
author_facet	Enachi, Mihail Trofim, Viorel Tighineanu, Ion Ursachi, Veaceslav Coseac, Valeriu
author_sort	Enachi, Mihail
title	Characterization of structure and luminescence of titania nanotubes
title_short	Characterization of structure and luminescence of titania nanotubes
title_full	Characterization of structure and luminescence of titania nanotubes
title_fullStr	Characterization of structure and luminescence of titania nanotubes
title_full_unstemmed	Characterization of structure and luminescence of titania nanotubes
title_sort	characterization of structure and luminescence of titania nanotubes
publisher	D.Ghitu Institute of Electronic Engineering and Nanotechnologies
publishDate	2009
url	https://doaj.org/article/bbd1120a6b61492ab0b5097a5bd887ef
work_keys_str_mv	AT enachimihail characterizationofstructureandluminescenceoftitaniananotubes AT trofimviorel characterizationofstructureandluminescenceoftitaniananotubes AT tighineanuion characterizationofstructureandluminescenceoftitaniananotubes AT ursachiveaceslav characterizationofstructureandluminescenceoftitaniananotubes AT coseacvaleriu characterizationofstructureandluminescenceoftitaniananotubes
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Characterization of structure and luminescence of titania nanotubes

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