Synthesis of Magnetic Graphene-Fe3O4 Nanocomposite by Electrochemical Exfoliation Method

Superparamagnetic few-layer graphene nanocomposite (FLG-NC) can be used for many technological applications. In this work, we applied electrochemical exfoliation method as a simple, one step and economical technique to fabricate FLG-NC. The fabricated superparamagnetic FLG-NC were characterized by X-ray diffraction (XRD), Fourier transform infrared (FTIR) spectroscopy, scanning electron microscopy (SEM), field emission scanning electron microscope (FESEM), energy dispersive spectroscopy (EDS) and vibrating sample magnetometer (VSM). Analysis of XRD pattern shows the formation of graphene iron oxide nanocomposite due to the existence of magnetite (Fe3O4) and graphite picks. The SEM image show that the number of layers in nanocomposite is between 3 and 10. According to the results of SEM and XRD, the nanocomposite is FLG-Fe3O4. Hysteresis curve of the sample and size of ferromagnetic particles reduced to a critical size to represents superparamagnetic properties with saturation magnetization MS=57.3 emu. g-1. The results are useful for preparation of large magnetic moment superparamagnetic nanocomposite.