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Vol. 137, Issue 2, February 2012, pp. 176-188

 

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Nanostructured MgFe2O4 Thick Film Resistors as Ethanol Gas Sensors Operable at Room Temperature

 

* S. V. BANGALE, S. R. BAMANE

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: 3 December 2011   /Accepted: 14 February 2012   /Published: 28 February 2012

Digital Sensors and Sensor Sysstems

 

Abstract: Semiconductive nanoparticles of MgFe2O4 were synthesized by a solution combustion technique. This process is a convenient, environment friendly, inexpensive and efficient for the preparation of MgFe2O4 nanomaterial. The synthesized material is characterized by Thermo gravimetric Differential analysis (TG/DTA), X-ray Diffraction studied (XRD), Scanning Electron Microscopy (SEM) and Transmission Electron Microscopy (TEM) techniques. Conductance response of the nanocrystalline MgFe2O4 thick film is measured by exposing the film to reducing gases like ethanol, acetone, sulphur dioxide (H2S), carbon dioxide (CO2), and liquefied petroleum gas (LPG). The sensor exhibited a fast response and a good recovery. The results demonstrated that MgFe2O4 can be used as a gas-sensing material which has a high sensitivity and good selectivity to ethanol gas at 30 ppm.

 

Keywords: Nanostructured MgFe2O4, XRD, TEM, Ethanol gas sensors, Gas sensitivity

 

 

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