Abstract
This study reports the facile atmospheric pressure microplasma-assisted synthesis of NiCo2O4 nanocomposite with the cubic spinel phase. The prepared samples were investigated in terms of their structural, morphological, compositional, electrical and optical properties. It was observed that the spherically shaped NiCo2O4 nanostructures have a face-centered cubic (fcc) crystalline structure with a space group of Fd-3 m. Raman spectra revealed a blue shift in the A1g and E2g modes which can be attributed to the nano-sized effect of NiCo2O4. Electrical properties showed a semiconducting behavior which can be explained by the nearest-neighbor hopping (NNH) process. The photocatalytic activity against rhodamine B dye aqueous solution was studied, and significant degradation was achieved after 120 min of solar irradiation. This understanding will be helpful for the fabrication and design of NiCo2O4 nanostructure-based wastewater purification and energy storage nanodevices.
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