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Photoelectrochemical properties of electrospun titania nanofibers - comparison with nanoparticles

Published online by Cambridge University Press:  31 January 2011

Jan Macak ,
Jaromir Pytel ,
Jesus Rodriguez Ruiz  and
Radim Beranek
Jan Macak
Affiliation:
janmacak@seznam.cz
Jaromir Pytel
Affiliation:
jaromir.pytel@elmarco.com, Elmarco, RD, Liberec, Czech Republic
Jesus Rodriguez Ruiz
Affiliation:
j.rodriguez@dicm.unica.it, Università degli Studi di Cagliari, Cagliari, Italy
Radim Beranek
Affiliation:
radim.beranek@chemie.uni-erlangen.de, University of Erlangen, Chemistry, Erlangen, Germany
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Abstract

Photoelectrochemical properties of photoelectrodes consisting of pressed layers of electrospun TiO2 nanofibers were investigated by wavelength-resolved photocurrent measurements in LiClO4 (0.1 M) aqueous electrolyte with or without addition of KI as an additional hole scavenger. The photocurrents on nanofiber electrodes were three-times lower as compared to electrodes based on Hombikat nanocrystalline particles. The calcination of electrodes was necessary to observe enhanced efficiencies in the presence of iodide. The most striking difference between nanofiber and particulate electrodes was found in the effect of calcination on the efficiency of water photooxidation.

Keywords

nanostructureoptical propertiesphotochemical
Type
Research Article
Information
MRS Online Proceedings Library (OPL) , Volume 1211: Symposium R – Advanced Nanostructured Solar Cells , 2009 , 1211-R08-34
Copyright
Copyright © Materials Research Society 2010

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