Electrochromic properties of TiO2 nanotubes coated with electrodeposited MoO3

Di Yao, David, Field, Matthew R, O'Mullane, Anthony P., Kalantar-Zadeh, Kourosh, & Ou, Jian Zhen (2013) Electrochromic properties of TiO2 nanotubes coated with electrodeposited MoO3. Nanoscale, 5(21), pp. 10353-10359.

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Abstract

Despite a favourable morphology, anodized and ordered TiO2 nanotubes are incapable of showing electrochromic properties in comparison to many other metal oxide counterparts. To tackle this issue, MoO3 of 5 to 15 nm thickness was electrodeposited onto TiO2 nanotube arrays. A homogenous MoO3 coating was obtained and the crystal phase of the electrodeposited coating was determined to be α-MoO3. The electronic and optical augmentations of the MoO3 coated TiO2 platforms were evaluated through electrochromic measurements. The MoO3/TiO2 system showed a 4-fold increase in optical density over bare TiO2 when the thickness of the MoO3 coating was optimised. The enhancement was ascribed to (a) the α-MoO3 coating reducing the bandgap of the composite material, which shifted the band edge of the TiO2 platform, and subsequently increased the charge carrier transfer of the overall system and (b) the layered morphology of α-MoO3 that increased the intercalation probability and also provided direct pathways for charge carrier transfer.

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23 citations in Scopus
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7 citations in Web of Science®

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ID Code: 64346
Item Type: Journal Article
Refereed: Yes
DOI: 10.1039/c3nr03666a
ISSN: 2040-3364
Divisions: Current > QUT Faculties and Divisions > Science & Engineering Faculty
Copyright Owner: Copyright 2013 The Royal Society of Chemistry
Deposited On: 12 Nov 2013 23:58
Last Modified: 13 Nov 2013 23:26

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