Enhanced photo-electrochemical potentialof Fe2O3 modified TiO2 nanotube array with multiple legs

Enhanced photo-electrochemical potentialof Fe2O3 modified TiO2 nanotube array with multiple legs In this report, TiO2 nanotube array with multiple legs (TNML) were fabricated through electrochemical anodization route. To increase the photo-electrochemical efficiency under visible light, TNML in anatase phase were modified suitably with a pH controlled thin layer of Fe2O3 using electrode deposition method followed by anodization in an inert electrolyte. The resulting Fe2O3/TiO2 hybrid nano structure shows a 46% increase in photocurrent density than bare TNML under 1 sun illumination. The enhancement in photocurrent density was attributed to generation of electron hole pair under low energetic (higher wavelength) visible light as well due to the effective narrowed band gap in Fe2O3/TNML hybrid electrode. Moreover, the re-configured band position of individual semiconductors in the resulting hybrid electrode largely reduces the recombination rate and correspondingly increases the photocurrent density. http://www.deepdyve.com/assets/images/DeepDyve-Logo-lg.png Journal of Materials Science: Materials in Electronics Springer Journals

Enhanced photo-electrochemical potentialof Fe2O3 modified TiO2 nanotube array with multiple legs

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Publisher
Springer Journals
Copyright
Copyright © 2017 by Springer Science+Business Media, LLC, part of Springer Nature
Subject
Materials Science; Optical and Electronic Materials; Characterization and Evaluation of Materials
ISSN
0957-4522
eISSN
1573-482X
D.O.I.
10.1007/s10854-017-8410-4
Publisher site
See Article on Publisher Site

Abstract

In this report, TiO2 nanotube array with multiple legs (TNML) were fabricated through electrochemical anodization route. To increase the photo-electrochemical efficiency under visible light, TNML in anatase phase were modified suitably with a pH controlled thin layer of Fe2O3 using electrode deposition method followed by anodization in an inert electrolyte. The resulting Fe2O3/TiO2 hybrid nano structure shows a 46% increase in photocurrent density than bare TNML under 1 sun illumination. The enhancement in photocurrent density was attributed to generation of electron hole pair under low energetic (higher wavelength) visible light as well due to the effective narrowed band gap in Fe2O3/TNML hybrid electrode. Moreover, the re-configured band position of individual semiconductors in the resulting hybrid electrode largely reduces the recombination rate and correspondingly increases the photocurrent density.

Journal

Journal of Materials Science: Materials in ElectronicsSpringer Journals

Published: Dec 14, 2017

References

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