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                                                       Sonochemical Synthesis Route of Cobalt Ferrite Particles
                                                            Cho Cho Thet, Thu Thu Hlaing, Aye Aye Hlaing, Takaomi Kobayashi
                            Universities’ Research Centre, University of Yangon, University Avenue Road, Yangon, Myanmar
                                                                                              [email protected]
ABSTRACT
Cobalt ferrite (CoFe2O4) particles depending on pH (9, 10, 11) of the synthesis solution were synthesized by high frequency ultrasound method. The formation of spinel ferrite structure for each pH of as-synthesized samples was studied by varying the three different post annealing temperatures (600, 700 and 800 ⁰C). The optimum pH value and post annealing temperatures were systematically investigated by Fourier-Transform Infrared (FTIR) analysis. While the compound identification of spinel ferrite was characterized by UV-vis and FTIR spectroscopy, the crystal structure was studied by X-ray Diffraction (XRD). Elemental analysis and surface morphology of ferrites were characterized by Wavelength Dispersive Energy Fluorescence (WDXRF) and Scanning Electron Microscopy (SEM). XRD study confirmed that the final product was single phase spinel ferrite of CoFe2O4 particles. It was found out that complete spinel ferrite structure was obtained at pH-9 and annealing temperature 600 ⁰C for 4 h. From the observation of our work, sonochemical synthesis at particular pH and followed by post annealing favoured to achieve highly crystalline single crystal phase of cobalt spinel ferrite particles.
Keywords – sonochemical, CoFe2O4, spinel structure, FTIR, pH