Synthesis and Study of Temperature Effect on the spectroscopic properties of The Nickel Ferrites by Glycine-Nitrate Auto-Combustion

Abstract

The spinel Ni-ferrite with different synthesizing temperature was synthesized by the glycine-nitrate auto-combustion process. X-ray diffraction, field emission-scanning electron microscopy, Fourier transform-infrared spectroscopy and Photoluminescence analysis were used to characterize structural, morphological and optical properties of the as-synthesized samples. The XRD results revealed that the as-synthesized samples possess a cubic spinel structure and the lattice constant decreases from 8.3435 Å to 8.3321Å when the synthesis temperature rises from 50˚C to 100˚C. Further, Increasing the synthesis temperature led to increase the crystallite size from 25 nm to 32 nm. FE-SEM images show that the nanoparticles have agglomerated. FTIR spectra supported the formation of the Ni-ferrite structure and show that the absorption band of a particular bond is shifted to the higher frequency with a rise in temperature. Photoluminescence (PL)  spectrum consists of emission peaks at 350 nm (3.54 eV), 680 nm (1.82 eV), 770 nm (1.61 eV), and 820 nm (1.51 eV). The PL peaks were shifted to shorter wavelengths with an increase in the emission intensity when increasing the temperature of synthesis