Abstract
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•The synthesis of pure and iron-doped nickel oxide (NiO) nanoparticles (NPs) using a chemical precipitation method.•The average crystallite sizes of samples N1, N2, N3, and N4 were 28, 26, 25, and 24 nm, respectively.•The effect of iron doping on the optical bandgap of NiO NPs demonstrates that the bandgap increases with the increase in doping concentrations (x = 0.02 M, 0.04 M, and 0.06 M).•The Vibrating sample magnetometer exhibited a ferromagnetic behaviour at room temperature. When Fe2+-doped on NiO NPs with a concentration of 0.002 M can be used in magnetic resonance imaging and data storage applications.•Fe-doped sample (N2) shows promising supercapacitor electrode material properties ensuring that NiO: Fe could act as an enhanced working electrode for the future generation of supercapacitors.
In this study, we report on the synthesis of pristine and iron (Fe)-doped nickel oxide nanoparticles (NPs) using a precipitation method. The optical, magnetic, and supercapacitor properties of NPs were investigated via ultraviolet–visible absorption, vibrating sample magnetometer (VSM), and cyclic voltammetry (CV). The effect of Fe doping on the optical bandgap of NiO nanoparticles demonstrates that the bandgap increases with increasing doping concentration (x = 0.02 M, 0.04 M, and 0.06 M). The VSM exhibits ferromagnetic behavior at room temperature. Fe doped sample shows promising supercapacitor electrode material properties ensuring that NiO: Fe could act as an enhanced working electrode for the future generation of supercapacitors.