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Issue 22, 2009
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Formation of various TiO2nanostructures from electrochemically anodized titanium

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Abstract

TiO2nanostructures, including nanowires, highly ordered nanotube arrays, and single crystalline nanoplates, were obtained from electrochemically anodized Ti foil in a fluorine-containing ethylene glycol electrolyte. The TiO2nanowires, formed by the electric field induced chemical splitting of TiO2nanotubes by fluoride ions during a lengthy anodization can be isolated from the nanotube arrays by mild ultrasonication. The highly ordered TiO2nanotubes buried underneath are thus exposed. The transformation of as-prepared amorphous TiO2nanotubes into the anatase or rutile phase as a function of annealing temperature was systematically scrutinized by Raman spectroscopic measurements in conjunction with TEM imaging. In the latter study, the ultramicrotomed sections of the samples clearly exhibited the formation of highly crystalline TiO2. More importantly, crystalline TiO2nanotubes were mechanically broken into intriguing single crystalline TiO2 nanoplates as a result of ultramicrotoming. The present study not only demonstrates a facile approach to produce high quality TiO2nanowires, nanotubes, and nanoplates in a simple manner, but also provides valuable insights into temperature dependent crystalline transformation in the anodic TiO2nanotube arrays.

Graphical abstract: Formation of various TiO2nanostructures from electrochemically anodized titanium

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Publication details

The article was received on 03 Mar 2009, accepted on 14 Mar 2009 and first published on 20 Apr 2009


Article type: Paper
DOI: 10.1039/B904247D
Citation: J. Mater. Chem., 2009,19, 3682-3687
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    Formation of various TiO2nanostructures from electrochemically anodized titanium

    J. Wang, L. Zhao, V. S.-Y. Lin and Z. Lin, J. Mater. Chem., 2009, 19, 3682
    DOI: 10.1039/B904247D

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