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Vol. 92, Issue 5, May 2008, pp. 69-86

 

 

Bullet

Vanadium Doped Tungsten Oxide Material - Electrical Physical and Sensing Properties

 

Shishkin N. Y.,* Cherkasov V. A.*, Komarov A. A.*, Bashkirov L. A.*, Bardi U.**, Gunko Y. K.***, Taratyn Y. A.****

*Belarus State University of Technology, Sverdlov st. 13-A, Minsk 220050, Belarus

E-mail: nickoshi@yahoo.com

**Dipartimento di Chimica, Universitą diFirenze, Polo Scientifico di Sesto Fiorentino, 50019 Firenze, Italy

***Department of Chemistry, Trinity College, Dublin 2, Ireland

****Minsk Research Institute of Radiomaterials 86, Kizhevatova str., 220024, Minsk, Belarus

 

 

Received: 14 April 2008   /Accepted: 20 May 2008   /Published: 26 May 2008

 

Abstract: The electrical physical and sensing (to VOCs and inorganic gases) properties of vanadium doped tungsten oxide in the regions of phase transition temperature were investigated. Vanadium oxide (II) dimerization was observed in the doped material, corresponding to new phase transition. The extreme sensitivity and selectivity to chemically active gases and vapors in small concentrations: CO, NOx, NH3 acetone, ethanol near phase transitions temperature was found. Sensor elements were manufactured for the quantitative detection (close to 1 ppm) of alcohol and ammonia.

 

Keywords: NOx; alcohol; ammonia; gas sensor; WO3 and V2O5 films; phase transition; ceramic compositions

 

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