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Self-organized TiO2 nanotube arrays by anodization of Ti substrate: Effect of anodization time, voltage and medium composition on oxide morphology and photoelectrochemical response

Published online by Cambridge University Press:  31 January 2011

A. Watcharenwong ,
W. Chanmanee ,
N.R. de Tacconi ,
C.R. Chenthamarakshan ,
P. Kajitvichyanukul  and
K. Rajeshwar
A. Watcharenwong
Affiliation:
National Research Center for Environmental and Hazardous Waste Management, Chulalongkorn University, Bangkok, Thailand
W. Chanmanee
Affiliation:
National Research Center for Environmental and Hazardous Waste Management, Chulalongkorn University, Bangkok, Thailand
N.R. de Tacconi
Affiliation:
Center for Renewable Energy Science and Technology (CREST), Department of Chemistry & Biochemistry, The University of Texas at Arlington, Arlington, Texas 76019
C.R. Chenthamarakshan
Affiliation:
Center for Renewable Energy Science and Technology (CREST), Department of Chemistry & Biochemistry, The University of Texas at Arlington, Arlington, Texas 76019
P. Kajitvichyanukul
Affiliation:
Department of Environmental Engineering, King Mongkut’s University of Technology Thonburi, Bangkok, Thailand
K. Rajeshwar*
Affiliation:
Center for Renewable Energy Science and Technology (CREST), Department of Chemistry & Biochemistry, The University of Texas at Arlington, Arlington, Texas 76019
*
a)Address all correspondence to this author. e-mail: rajeshwar@uta.edu
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Abstract

This study probes the relationship between the morphology of anodic titania (TiO2) layers grown on Ti foil substrates and their subsequent photoelectrochemical response in 0.5 M Na2SO4 supporting electrolyte. The effects of anodization variables (voltage and time) and anodization medium composition [water, glycerol, poly(ethylene glycol), ethylene glycol] along with fluoride ion concentration on the oxide layer of morphology and photoresponse are described. The degree of order of the self organized TiO2 nanotube arrays and the extent to which these arrays organize themselves over the entire substrate surface are key variables dictating the corresponding quality of the resultant photoresponse.

Keywords

ElectrodepositionElectrochemical synthesisOxide

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Type
Articles
Information
Journal of Materials Research , Volume 22 , Issue 11 , November 2007 , pp. 3186 - 3195
Copyright
Copyright © Materials Research Society 2007

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