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Vol. 137, Issue 2, February 2012, pp. 123-136




Preparation and Study of H2S Gas Sensing Behavior of ZnFe2O4 Thick Film Resistors



Metal Oxide Research, Laboratory, Department of Chemistry, Dr. Patangrao Kadam

Mahavidyalaya, Sangli 416416 (M.S.) India

Tel.: 0233-2535993, fax: 0233-2535993

E-mail: bangale_sv@rediffmail.com



Received: 5 January 2012   /Accepted: 14 February 2012   /Published: 28 February 2012

Digital Sensors and Sensor Sysstems


Abstract: Semiconductive nano-sized ZnFe2O4 material is synthesized by a solution combustion method using inorganic reagents as Zn(NO3)3. 6H2O, Fe(NO3)3.6H2O, and glycine as a fuel. This process is a convenient, environment friendly, inexpensive and efficient for the preparation of ZnFe2O4 nanomaterial. The synthesized material is characterized by Thermo gravimetric Differential analysis (TG/DTA), X-ray Diffraction studied (XRD), Energy dispersive X-ray microanalysis studies (EDX), Scanning Electron Microscopy (SEM) and Transmission Electron Microscopy (TEM) techniques. Conductance response of the nanocrystalline ZnFe2O4 thick film is measured by exposing the film to reducing gases like hydrogen sulphide (H2S), ammonia (NH3), acetone, carbon dioxide (CO2), hydrogen (H2), and ethanol. The sensor exhibited a fast response and a good recovery. The results demonstrated that ZnFe2O4 can be used as a gas-sensing material which has a high sensitivity and good selectivity to hydrogen sulphide (H2S) at 1000 ppm.


Keywords: Combustion reaction, TEM, Thick film, ZnFe2O4 nanoparticles, Gas sensor



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