Phase Transition of TiO2 Nanotubes: An X-ray Study as a Function of Temperature

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Dipartimento S.B.A.I, Sapienza Università di Roma - Via del Castro Laurenziano, 7 - 00161 Roma, Italy
Dipartimento di Chimica, Sapienza Università di Roma - Piazzale A. Moro, 5 - 00185 Roma, Italy
§ CNIS, Centro di Ricerca per le Nanotecnologie Applicate all’Ingegneria, Sapienza Università di Roma - Piazzale A. Moro, 5 - 00185 Roma, Italy
Dipartimento di Scienze della Terra, Sapienza Università di Roma - Piazzale A. Moro, 5 - 00185 Roma, Italy
*E-mail: [email protected] (F.A.S.).
*E-mail: [email protected] (P.B.).
*E-mail: [email protected] (M.P.).
Cite this: J. Phys. Chem. C 2017, 121, 44, 24871–24876
Publication Date (Web):October 10, 2017
Copyright © 2017 American Chemical Society
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Here, a study aimed to determine the phase transition temperature of titanium dioxide nanotubes, both in the presence and in the absence of a Ti layer underneath, is reported. Titania nanotube arrays with different diameters and wall thickness were synthesized via anodic growth at different potential values on a titanium foil. Ex and in situ high-temperature X-ray diffraction measurements were performed, respectively, on the arrays as such and on the powder obtained by detaching the nanotubes from the metallic substrate. Our results demonstrate that the presence of Ti dramatically influences the crystallization process decreasing the temperature formation of rutile, which tends to appear initially at the Ti/TiO2 interface.

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The Supporting Information is available free of charge on the ACS Publications website at DOI: 10.1021/acs.jpcc.7b08297.

  • SEM images, ex situ XRPD of TiO2 nanotube arrays on Ti upon heat treatment in air at increasing time and under a N2 atmosphere (PDF)

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This article is cited by 4 publications.

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