Physicochemical properties of CuFe 2 O 4 nanoparticles as a gas sensor

In this report, CuFe2O4 nanoparticles were synthesized using chemical co-precipitation method. The tetragonal phase formation of CuFe2O4 nanoparticles was confirmed by X-ray diffraction technique with its Rietveld refinement data, TEM and SEM analysis. The particle size of CuFe2O4 nanoparticles was found to be 6.4 ± 1 nm using Scherrer formula and TEM analysis. The surface morphology and porosity of CuFe2O4 nanoparticles and its sensing device were analysed using TEM, SEM and AFM images. The CuFe2O4 sensor was tested towards NH3, NO2, SO2 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 NH3 > NO2 > SO2 > smoke with response and recovery time 8 s and 5 min respectively.