Modification in Morphological and Structural behavior in NiCoO4-δ With Cobaltous Oxide Concentration

Abstract

In present scenario, the size of user’s application decreases with increase of its multi-functionalities. So, therefore, the technology based on nanomaterials will be future prospective material for today’s researchers. In this work, Cobalt doped Nickel Oxide nano-crystalline were synthesized via microwave modified chemical co precipitation protocols. Thereafter, various calcined samples were characterized via different tools and comparative studies were made in direction to study its morphological and structural changes with different concentration of doped material. The structural and morphological properties of un-doped and Co doped NiO (Co/NiO) samples with different concentration (5%, 10% & 20%) were studied through XRD, FTIR and FESEM tools etc. The X Ray Diffraction results observed that the most intense peak was noticed at 2θ≈ 43.33^Ofor NiO pure and 5% Co  doped sample, whereas, 2θ≈ 31.58^O were exhibited for Cobaltous concentration 10% and beyond range. Henceforth, the study reflects that a crystalline phase change occurred with Cobaltous concentration 10% and above i.e. FCC to pyramidal. The calculated grain size as  calculated by Debye Scherer formulation were 36.35nm, 40.61nm, 34.88nm and 30.61nm for NiO pure ,5% Co/NiO ,10%Co/NiO & 20% Co/NiO nano particulates respectively. The IR absorption peaks at about 451cm^-1& 575 cm^-1were assigned to O-Ni-O &O-Co-O lattice vibration. The FESEM spectra reflects that 2D truncated disk-like shape with an average diameter and grain size of around 50 nm and thickness of a few nanometers.