Abstract: Several strategies have been established for the synthesis of magnetic nanoparticles with tunable sizes, morphologies and magnetic properties. Most of these reports are based on synthesis of magnetic nanoparticles that involve use of environmentally vicious organic solvents and high temperature conditions. We present a facile, rapid, low temperature approach to synthesize crystalline Fe3O4 superstructures with high magnetic properties via a microwave-assisted sonochemical method and studied the effects of gum arabic (GA) as crystal growth modifier in the evolution of Fe3O4 morphology. We observed that the tansmission electron microscopy (TEM) investigations for GA as crystal growth modifier resulted in primary nanocrystal of cubic like morphologies. The as-synthesized Fe3O4 exhibit superparamagnetic properties with high saturation magnetization, 78.03 emu/g and have no residual magnetism. The Brunauer–Emmett–Teller (BET) analysis showed single point surface area of 84.9098 m²/g, BET surface area of 87.2872 m²/g and Langmuir Surface Area of 142.4986 m²/g. Magnetite nanoparticles with high saturation magnetization are required for enhanced MRI detection, cancer treatment (magnetic hyperthermia).
Authors: Stanley O. Omorogbe, Hilary I. Ifijen, Aireguamen I. Aigbodion, and Esther U. Ikhuoria
Keywords: Microwave-Assisted, superparamagnetic, Fe₃O₄, Gum arabic, Brunauer–Emmett–Teller