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Title: Investigation on effects of surface morphologies on response of LPG sensor based on nanostructured copper ferrite system

Journal Article · · Materials Research Bulletin
 [1];  [1];  [2]
  1. Nanomaterials and Sensors Research Laboratory, Department of Physics, University of Lucknow, Lucknow 226007, U.P. (India)
  2. DST Unit on Nanosciences, Department of Chemical Engineering, Indian Institute of Technology Kanpur, Kanpur, U.P. (India)

Graphical abstract: Figure shows the variations in resistance with time for copper ferrite system synthesized in various molar ratio. A maximum variation in resistance was observed for copper ferrite prepared in 1:1 molar ratio. Highlights: ► Evaluation of structural, optical and surface morphologies. ► Significant variation in LPG sensing properties. ► Surface modification of ferric oxide pellet by copper ferrite. ► CuFe{sub 2}O{sub 4} pellets for LPG sensing at room temperature. -- Abstract: Synthesis of a copper ferrite system (CuFe{sub 2}O{sub 4}) via chemical co-precipitation method is characterized by X-ray diffraction, surface morphology (scanning electron microscope) and optical absorption spectroscopy. These characteristics show their dependence on the relative compositions of the two subsystems. They are further confirmed by the variation in the band gap. A study of gas sensing properties shows the spinel CuFe{sub 2}O{sub 4} synthesized in 1:1 molar ratio exhibit best response to LPG adsorption/resistance measurement. Thus resistance based LPG sensor is found robust, cheap and may be applied for kitchens and industrial applications.

OSTI ID:
22215593
Journal Information:
Materials Research Bulletin, Vol. 47, Issue 11; Other Information: Copyright (c) 2012 Elsevier Science B.V., Amsterdam, The Netherlands, All rights reserved.; Country of input: International Atomic Energy Agency (IAEA); ISSN 0025-5408
Country of Publication:
United States
Language:
English