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Vanadium Doped Sol-Gel TiO2 Coatings

Domenii publicaţii > Chimie + Tipuri publicaţii > Articol în revistã ştiinţificã

Autori: Crisan, M., Zaharescu, M., Crisan, D., Ion, R.M

Editorial: Journal of Sol-Gel Science and Technology, 13(1-3), p.775-778, 1999.


A study of the experimental conditions required to obtain vanadium doped sol-gel TiO2 coatings is presented. Tetraethyl orthotitanate was employed as the TiO2 source and VCl3, VOSO4·H2O and VOSO4 dissolved in H2SO4 were employed as vanadium sources. Dip coating has been used to produce coatings on silicon wafers, spectral carbon electrodes and titanium electrodes. Both supported and unsupported films have been studied by UV-Vis spectra, IR spectroscopy and X-ray diffraction (XRD). The measurements have been made on samples as prepared and treated thermally at temperatures between 100°C and 300°C. The thermal treatment temperatures have been established from DTA/TGA measurements. The vanadium doped sol-gel TiO2 coatings have been tested as sensors for redox potential measurements in electrochemical processes. The influence of both the thickness of films and the nature of substrate has been investigated.

Cuvinte cheie: Electrochemical properties; Redox potential; Sensors; Sol-gel method; Vanadium doped TiO2 films