Green Synthesis of Fe3O4 Nanoparticles and Survey their Magnetic Properties

Fe3O4 nanoparticles were synthesized via a modified coprecipitation green method under ultrasound irradiations, and were characterized with X-ray diffraction (XRD), vibrating sample magnetometer (VSM), FT-IR spectroscopy, scanning electron microscope (SEM), and transmission electron microscopy. The influences of temperatures, effect of alkali and ultrasound irradiations on the grain size and properties of Fe3O4 nanoparticles were investigated.