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  • Synthesis of Fe nanoparticles@graphene composites for environmental applications.

Synthesis of Fe nanoparticles@graphene composites for environmental applications.

Journal of hazardous materials (2012-05-23)
Juan Guo, Ruiyu Wang, Weng Weei Tjiu, Jisheng Pan, Tianxi Liu
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.

MATERIALS
Product Number
Brand
Product Description

Sigma-Aldrich
Methyl Blue, for microscopy (Bot., Hist.), indicator (pH 9.4-14.0)
Sigma-Aldrich
Methyl Blue, certified by the Biological Stain Commission
Sigma-Aldrich
Methyl Blue, powder or crystals