Synthesis, Structural, Optical and Electrical Properties of Pure and Doped NiO Nanostructures Prepared via The Co-precipitation Method

Abstract

Here, we report the synthesized high purity NiO nanostructures using simple and inexpensive chemical route. NiO NPs and (Cu, Zn) single and dual doped NiO NPs prepared by co-precipitation technique and annealed at 350 ℃ for 2 hours. Structural properties of prepared samples were investigated by X-ray diffraction (XRD). The optical characterizations and electrical conductivity were characterized by UV-vis spectrophotometer and I-V measurement. The crystallite size for dual doped NiO samples was 7.9 ± 0.9 nm compared to pure NiO, which had 9.52 nm. These results are consistent with the ionic radii of the doped metals. The obtained values of the band gap energy increased from 3 eV for pure sample to higher values (3.14 ± 0.06 eV) for doped samples due to the quantum confinement effect. These results agreed with the DC conductivity of samples. The ionic conductivity σ_ionic was developed with dual doping. The characterization of the doped samples makes them good candidates for photoelectronic applications.