Vol. 109, Issue 10, October 2009, pp. 86-95

Structural Properties of Nanosized NiFe₂O₄ for LPG Sensor

N. N. GEDAM, A. V. KADU, P. R. PADOLE, A. B. BODADE and *G. N. CHAUDHARI

Nano Technology Research Laboratory, Department of Chemistry Shri Shivaji Science College, Amravati- 444602, M.S., India

E-mail: niraj.gedam@gmail.com

Received: 12 October 2009 /Accepted: 24 November 2009 /Published: 30 November 2009

Abstract: Nanocrystalline NiFe₂O₄ has been synthesized by sol-gel citrate method. The synthesized powder was characterized by X-ray diffraction (XRD) and Transmission electron microscopy (TEM). As found from the XRD line broadening, the crystallite size of the powder was found to be 40 nm. The gas sensing properties were studied for reducing gases such as LPG, CH₄, CO and NH₃. It was observed that the nanosized NiFe₂O₄ shows high sensitivity for LPG at an operating temperature 300 ^oC. Pd incorporation in NiFe₂O₄ results in a decrease in operating temperature by 100 ^oC and improves the sensing characteristics in terms of response time.

Keywords: NiFe₂O₄, Gas sensor, Sensitivity, Selectivity

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