Stable TiO

F. Mura, A. Masci, M. Pasquali, A. Pozio

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25 Citations (Scopus)

Abstract

This work is intended to define an optimal methodology for preparing highly ordered TiO2nanotube arrays by a 60-V anodization in a glycol ethylene solution. In order to obtain a mechanically stable structure with a high UV photoconversion efficiency, it is necessary to carefully control the growth mechanism through the anodization process. For this reason, the nanotube arrays have to be formed upon a compact titanium dioxide layer with well-defined thickness. Besides, both the fluoride concentration and anodization time are strictly correlated, because elevated concentrations and/or a long anodization time produce unstable structure with low photoconversion efficiency. The best result in the terms of reproducibility has been obtained previously for a three-minute galvanostatic oxide growth on the pickled titanium sheet, and anodic growth in ethylene glycol solution containing 1 wt.% H2O and 0.20 wt.% NH4F for a period lower than 4.5 h. The UV photoconversion efficiency was measured and a maximum value of 28.3% has been obtained, which is the highest result in the literature. © 2009 Elsevier Ltd. All rights reserved.
Original languageEnglish
Pages (from-to)2246 - 2251
Number of pages6
JournalElectrochimica Acta
Volume55
Issue number7
DOIs
Publication statusPublished - 28 Feb 2010

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All Science Journal Classification (ASJC) codes

  • Chemical Engineering(all)
  • Electrochemistry

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