title: Synthesis of Fe nanoparticles@graphene composites for environmental applications.
abstract: Fe nanoparticles@graphene composites (FGC) are successfully synthesized by using graphene oxide (GO) as a supporting matrix. GO is first treated with Fe(3+) to form Fe(3+)@GO complexes. Then, by adding NaBH(4) solution, Fe(3+) and GO are simultaneously reduced in situ to Fe and graphene respectively, forming FGC hybrid composites. The structures, properties and applications of the hybrids thus obtained are investigated by X-ray diffraction, Raman spectroscopy, Fourier transformed infrared spectroscopy, X-ray photoelectron spectroscopy, transmission electron microscopy, energy-dispersive X-ray spectroscopy, thermogravimetric analysis and magnetization measurements. The hybrids are also evaluated for decolorization of methyl blue solution, a model dye in wastewater of dyeing industry. Compared with bare Fe particles, the high removal capacities of FGC are due to the increased adsorption sites in the hybrids, which are achieved by inhibiting the particle aggregation and reducing the size of Fe nanoparticles.
authors.affiliation: State Key Laboratory of Molecular Engineering of Polymers, Department of Macromolecular Science, Fudan University, Shanghai 200433, PR China.
authors.forename: Juan
authors.initials: J
authors.lastname: Guo
authors.forename: Ruiyu
authors.initials: R
authors.lastname: Wang
authors.forename: Weng Weei
authors.initials: WW
authors.lastname: Tjiu
authors.forename: Jisheng
authors.initials: J
authors.lastname: Pan
authors.forename: Tianxi
authors.initials: T
authors.lastname: Liu
mesh_terms: D001557:Benzenesulfonates / Q000737:chemistry; D004396:Coloring Agents / Q000737:chemistry; D006108:Graphite / Q000737:chemistry*; D007501:Iron / Q000737:chemistry*; D053768:Metal Nanoparticles / Q000737:chemistry* / Q000648:ultrastructure; D046529:Microscopy, Electron, Transmission; D056951:Photoelectron Spectroscopy; D017550:Spectroscopy, Fourier Transform Infrared; D013059:Spectrum Analysis, Raman; D014874:Water Pollutants, Chemical / Q000737:chemistry*; D018508:Water Purification / Q000379:methods; D014961:X-Ray Diffraction
chemical_list: D001557:Benzenesulfonates; D004396:Coloring Agents; D014874:Water Pollutants, Chemical; D006108:Graphite; C414357:Methyl Blue; D007501:Iron