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

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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.

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Acknowledgements

The authors would like to thank Dr. Somnath Chanda Roy and Prof. M. S. Ramachandra Rao for allowing us to carry out the experimental work in their labs ENL and MSRC at IIT Madras, respectively. We are also thankful to Mohd Azhardin Ganayee research scholar at IIT Madras (Prof. T. Pradeep’s lab, Chemistry Department) for his valuable guidance and encouragement. Finally, the authors would like to extend their gratitude to NIT Srinagar, MHRD and DST for their support to carry out this work.

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Authors and Affiliations

  1. Special Centre for Nano-Science, P.G. Department of Physics, National Institute of Technology Srinagar, 190006, Jammu and Kashmir, India

    Muzaffar Ahmad Boda & Mohammad Ashraf Shah

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  1. Muzaffar Ahmad Boda
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  2. Mohammad Ashraf Shah
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Correspondence to Muzaffar Ahmad Boda.

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Boda, M.A., Shah, M.A. Enhanced photo-electrochemical potential of Fe2O3 modified TiO2 nanotube array with multiple legs. J Mater Sci: Mater Electron 29, 4596–4601 (2018). https://doi.org/10.1007/s10854-017-8410-4

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  • DOI: https://doi.org/10.1007/s10854-017-8410-4

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