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Effects of synthesis conditions on dimensions, structure, and oxygen content of photocatalytically active titania nanotubes

Published online by Cambridge University Press:  31 January 2011

Elizabeth Ranney ,
John Mansfield ,
Kai Sun  and
Johannes Schwank
Elizabeth Ranney*
Affiliation:
Department of Chemical Engineering, University of Michigan, Ann Arbor, Michigan 48109
Kai Sun
Affiliation:
Department of Materials Science and Engineering, University of Michigan, Ann Arbor, Michigan 48109
Johannes Schwank
Affiliation:
Department of Chemical Engineering, University of Michigan, Ann Arbor, Michigan 48109
*
a)Address all correspondence to this author. e-mail: ranney@umich.edu
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Abstract

In this study, we report a method for the formation and characterization of aligned arrays of amorphous titania nanotubes by anodic oxidation in thin titanium films on SiO2 substrates using fluoride-containing electrolytes. Trends in titania nanotube geometries as a function of synthesis conditions were established. A titania nanotube array surface area of approximately 178 m2/g is reported. The titania nanotubes transitioned to the rutile crystal structure when heated in air at 530 °C–705 °C. The degradation of methylene blue under UV light showed that lower fluoride concentrations in the synthesis electrolyte result in higher photocatalytic activity of the titania nanotubes. These results indicate that the synthesis conditions affect the oxygen content of amorphous nanotubes, which determines their physical and chemical properties.

Keywords

CatalyticNanostructureTi
Type
Articles
Information
Journal of Materials Research , Volume 25 , Issue 1: Photocatalysis for Energy and Environmental Sustainability , January 2010 , pp. 89 - 95
Copyright
Copyright © Materials Research Society 2010

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References

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