Synthesis and Characterization of Cobalt and Nickel Doped in Barium Hexaferrite Nanoparticles for Photocatalysis

Abstract

The exceptionally unique magnetic and electric properties of ferrites have always been of strong interest leading to their extensive commercial use. Barium hexaferrite, is one of the materials being used in microwave, electronic and magnetic devices. In present research study, cobalt and nickel substitution is performed in a series of Ba1-2x Nix Cox Fe12O19 (x= 0, 0.1, 0.175, 0.25). Synthesis was performed using sol gel method and aqueous solutions of nitrates were used to prepare pure and doped barium hexaferrite nanoparticles. Calcination of the prepared samples was performed at 950 oC for 5 hours. The samples were characterized using Xray Diffraction, Fourier Transform Inferred Spectroscopy Vibrating Sample Magnetometer Scanning Electron Microscopy & UV Vis. Impedance analyzer was used to analyze the dielectric properties. Magnetic properties of the samples were studied using Vibrating Sample Magnetometer. XRD analysis confirms the hexagonal crystal structure of prepared Ba1-2x Nix Cox Fe12O19. Crystallite size was calculated using Debye Scherer formula. Vibrating band positions were studied using FTIR. Dielectric studies revealed an increase in dielectric constant with the increasing dopant concentration. Similarly, with increasing x value, the dielectric loss value was also increased. Magnetic properties of the prepared samples showed an increase in magnetic saturation. A decrease in magnetic coercivity has been observed with increasing dopant concentration. The prepared samples showed an enhancement in dielectric and magnetic properties proving to be an efficient candidate for many magnetic and electrical applications. UV-Vis confirms the Photodegradation in the presence of Methyl-Blue the degradation process observed under the sunlight for 0-120mins at the rate of 30mins per sample concentration wise Ba1-2x Nix Cox Fe12O19 (x= 0, 0.25).