One-step solvothermal synthesis of an iron oxide-graphene magnetic hybrid material with high porosity

A graphene-based magnetic hybrid porous material was fabricated through a one-step solvothermal approach using graphene oxide and iron precursors, in which the reduction of the graphene oxide and the formation of the magnetic iron oxide nanoparticles proceeded simultaneously. Owing to the driving force of the chemisorption interaction, the graphene sheets and magnetic nanoparticles assembled into three-dimensional structures. The materials exhibit superparamagnetism (saturation magnetization: 0.1-20.3 emu g(-1)), and were characterized by X-ray diffraction, thermal gravimetric analysis, transmission electron microscopy, infrared spectra and Raman spectroscopy. Gas sorption analysis shows the as-prepared hybrid material has high porosity (BET specific surface area: 418-901 m(2) g(-1)), and the hydrogen uptake value ranges from 0.88 to 1.44 wt.%. (C) 2012 Elsevier Inc. All rights reserved.