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Fabrication and photoelectrochemical studies of BiTiO pyrochlore thin films by aerosol assisted chemical vapour deposition

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posted on 02.12.2014, 16:07 authored by Andrew McInnes, Jagdeep Sagu, Upul Wijayantha-Kahagala-Gamage
Phase pure thin film BiTiO photoelectrodes were produced by aerosol assisted chemical vapour deposition at 600 °C for the first time. X-ray diffraction analysis showed that the as-deposited BiTiO films were amorphous in nature; however, post-deposition annealing at 600°C for 12 h significantly increased the crystallinity to give phase pure BiTiO. Scanning electron microscopy revealed that the as-deposited film had a cauliflower-like structure with features ranging from 0.5 to 1.0 μm in size. It was found that the post-annealing step sintered the features together reducing the pores in the structure and giving rise to larger features of 1.0-2.0 μm in size. Optical studies showed that the BiTiO film had a direct band gap of 2.74 eV. The photoelectrochemical properties of BiTiO were tested and it was found that the electrodes exhibited a photocurrent density of 1.8 μA cm at 0.23 V vs. Ag|AgCl. Results showed that BiTiO is an attractive material for photoelectrochemical water splitting.

Funding

This work was supported by the Engineering and Physical Sciences Research Council (EPSRC) [grant number EP/G037116/1].

History

School

  • Science

Department

  • Chemistry

Published in

Materials Letters

Volume

137

Pages

214 - 217

Citation

MCINNES, A., SAGU, J.S. and WIJAYANTHA, K.G.U., 2014. Fabrication and photoelectrochemical studies of BiTiO pyrochlore thin films by aerosol assisted chemical vapour deposition. Materials Letters, 137, pp.214-217.

Publisher

© Elsevier

Version

VoR (Version of Record)

Publisher statement

This work is made available according to the conditions of the Creative Commons Attribution 3.0 Unported (CC BY 3.0) licence. Full details of this licence are available at: http://creativecommons.org/licenses/by/3.0/

Publication date

2014

Notes

This is an Open Access Article (CC-BY 3.0). It is published by Elsevier as Open Access at: http://dx.doi.org/10.1016/j.matlet.2014.08.151

ISSN

0167-577X

Language

en

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