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

Synthesis of a copper ferrite system (CuFe2O4) 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 CuFe2O4 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.

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.Figure optionsDownload as PowerPoint slideHighlights
► Evaluation of structural, optical and surface morphologies.
► Significant variation in LPG sensing properties.
► Surface modification of ferric oxide pellet by copper ferrite.
► CuFe2O4 pellets for LPG sensing at room temperature.