Physicochemical properties of CuFe_2O_4 nanoparticles as a gas sensor

摘要

AbstractIn this report, CuFe2O4nanoparticles were synthesized using chemical co-precipitation method. The tetragonal phase formation of CuFe2O4nanoparticles was confirmed by X-ray diffraction technique with its Rietveld refinement data, TEM and SEM analysis. The particle size of CuFe2O4nanoparticles was found to be 6.4 ± 1 nm using Scherrer formula and TEM analysis. The surface morphology and porosity of CuFe2O4nanoparticles and its sensing device were analysed using TEM, SEM and AFM images. The CuFe2O4sensor was tested towards NH3, NO2, SO2and 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.