Stojkovikj, Sasho and Koleva, Violeta and Najdoski, Metodija (2013) Chemical deposition of nano-sized electrochromic thin films of Na0.33V2O5∙H2O xerogels. In: 15th International Workshop on Nanoscience & Nanotechnology, 21-23 Nov 2013, Sofia, Bulgaria.
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Abstract
Electrochromic sodium intercalated vanadium(V) oxide xerogels thin films with
composition Na0.33V205-H2O have been deposited on electroconductive
FTO glass substrates by a simple chemical bath method. The deposition of the
homogenous thin films is performed at temperature of 85 °C from an aqueous
solution containing sodium metavanadate and diethyl sulfate. The xerogel
formation is based on the acidification of the metavanadate solution as a result
of the hydrolysis process of (C2H5)2S04. Thin films with thickness of about
110 nm are prepared for a deposition time of 10 min. The composition,
structure and morphology of the films are studied by XRD, IR spectroscopy,
TG-DTA and SEM. SEM observations evidence that the film surface is well
covered from ribbon-like units composed of nano-particles with dimensions
between 50 and 100 nm. The cyclic voltammetry curves display stable redox
pairs related to the transitions between V(V) and V(IV) sites which give rise to
colour changes: yellow/green/blue. UV-VIS spectra are examined in two
electrolytes. Better results regarding the transmittance variance are obtained
al in propylene carbonate as the best value achieved is 37 % at 900 nm.
| Item Type: | Conference or Workshop Item (Poster) |
|---|---|
| Subjects: | Natural sciences > Chemical sciences Engineering and Technology > Materials engineering Engineering and Technology > Nano-technology |
| Divisions: | Faculty of Technology |
| Depositing User: | Saso Stojkovik |
| Date Deposited: | 11 Mar 2024 08:38 |
| Last Modified: | 11 Mar 2024 08:38 |
| URI: | https://eprints.ugd.edu.mk/id/eprint/33844 |
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