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

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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