Physicochemical properties of CuFeO nanoparticles as a gas sensor.

In this report, CuFeO nanoparticles were synthesized using chemical co-precipitation method. The tetragonal phase formation of CuFeO nanoparticles was confirmed by X-ray diffraction technique with its Rietveld refinement data, TEM and SEM analysis. The particle size of CuFeO nanoparticles was found to be 6.4 ± 1 nm using Scherrer formula and TEM analysis. The surface morphology and porosity of CuFeO nanoparticles and its sensing device were analysed using TEM, SEM and AFM images. The CuFeO sensor was tested towards NH, NO, SO and smoke as change in conductance in terms of impedance spectroscopy with the help of electrochemical workstation. The performance of the sensor was investigated in the form of sensitivity, response and recovery time. The sensitivity was observed in the following order NH > NO > SO > smoke with response and recovery time 8 s and 5 min respectively. [ABSTRACT FROM AUTHOR]