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Vol. 134, Issue 11, November 2011, pp.45-55

 

Bullet

 

Nanostructured Ferrite Based Electronic Nose Sensitive to Ammonia at Room Temperature

 

a U. B. GAWAS, a V. M. S. VERENKAR, b D. R. PATIL

a Department of Chemistry, Goa University, Taleigao Plateau, Goa, India

b Bulk and Nanomaterials Research Lab., R. L. College, Parola, 425111, India

Tel.: + 91 2597 202419, Mob.: + 91 9860335029

E-mail: prof_drpatil@yahoo.in

 

 

Received: 9 October 2011   /Accepted: 21 November 2011   /Published: 29 November 2011

Handbook of Laboaratory Measurements book

 

Abstract: Manganese and Nickel doped Zinc Ferrite powder (Mn0.3Ni0.3Zn0.4Fe2O4) was synthesized by autocatalytic thermal decomposition technique. The average crystallite size in the material powder was found to be of 10 13 nm. Characterization techniques such as X-Ray diffraction studies, Transmission electron microscopy, Infra-Red spectroscopy, etc, were employed to study the average particle size, phase and composition of the ferrite. Thick films of Mn0.3Ni0.3Zn0.4Fe2O4 were prepared by screen printing technique. These films were observed to be sensitive to 10 ppm NH3 at room temperature. The effects of surface microstructure, operating temperature, gas concentrations, etc., on the gas response, selectivity, response and recovery times of the sensor in the presence of NH3 and other gases were studied and discussed.

 

Keywords: Mn0.3Ni0.3Zn0.4Fe2O4, Ferrites, Room temperature, NH3, Gas sensor

 

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