| Graphene has attracted a large number of attention of the academic society because of its excellent physical and chemical properties since its was fund in 2004. Nevertheless, graphene has its limitation in practical application so that functionalization of graphene is desirable. As one of traditional magnetic material, Fe3O4 possess excellent properties such as abundant, inexpensive, nontoxic. Combining graphene and Fe3O4 make the composites possess the advantage of these materials. The as-prepared nanocomposite was used as an adsorbent to remove dye from wastewater. The graphene-Fe3O4 nanocomposite shows excellent ability to extract organic pollutants and can be easily manipulated in a magnetic field for separation.In this article, a facile and fast one-pot method was developed to synthesize a magnetic graphene- Fe3O4 nanocomposite at low reaction temperature. The synthesized nanocomposite was characterized by X-ray diffraction, transmission electron microscopy, Fourier transform infrared spectroscopy, X-ray photoelectron spectroscopy, vibrating sample magnetometer. The Fe3O4 nanoparticles with average sizes of 24 nm were formed uniformly on graphene sheets. The saturation magnetization of the nanocomposite is 50.7emu/g. Furthermore, the influence of graphene nanosheets decorated with tunable magnetic nanoparticles on adsorption efficiency was investigated. The result indicated the less Fe3O4 nanoparticles decorated on the graphene sheets, the higher the adsorption efficiency of adsorbent had. Moreover adsorption kinetics and isotherm were investigated adsorption mechanism.Finally, we synthesized graphene- Fe3O4 nanocomposite with various morphologies and structures by adjustting dosage, adding subsequence and synthetize temperature. The results demonstrate the integration of individual graphene- Fe3O4 two dimensional sheets into monoliths with three dimensional macroporous architectures will imporove the efficiency on wastewater remediation. |
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