Synthesis of Superparamagnetic Graphene-Iron Oxide Nanocomposites by Electrochemical Exfoliation Method

Sperparamagnetic graphene-iron oxide nanocomposites (G-IONPs) can be used for many technological applications, such as solar cells, batteries, touch panels and supercapacitors. In this work, we applied electrochemical exfoliation method as a simple, one step [1] and economic technique to fabricate G-IONPs. The fabricated G-IONPs were characterized by X-ray diffraction (XRD), Fourier Transform Infrared Spectroscopy (FTIR), 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 nanocomposites due to the existence of maghemite (Fe2O3) and graphite picks. Also from VSM and hysteresis curve, it was found that the specific saturation magnetization, Ms of the sample, is 57.3emu.gr - 1 with superparamagnetic properties. The results of XRD and VSM indicate that the size of ferromagnetic particles reduced to critical size to form into superparamagnetic [2].