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The attachment of Fe sub(3)O sub(4) nanoparticles to graphene oxide by covalent bonding
Ist Teil von
Carbon (New York), 2010-09, Vol.48 (11), p.3139-3144
Erscheinungsjahr
2010
Link zum Volltext
Quelle
Elsevier ScienceDirect Journals Complete
Beschreibungen/Notizen
Hybrids of graphene oxide (GO) nanosheets and surface-modified Fe sub(3)O sub(4) nanoparticles (NPs) were fabricated by a two-step process. First, Fe sub(3)O sub(4) was modified by tetraethyl orthosilicate and (3-aminopropyl) triethoxysilane to introduce amino groups on its surface. Second, the amino groups of Fe sub(3)O sub(4) were reacted with the carboxylic groups of GO with the aid of 1-ethyl-3-(3-dimethyaminopropyl)carbodiimide and N-hydroxysuccinnimide to form a GO-Fe sub(3)O sub(4) hybrid. The attachment of Fe sub(3)O sub(4) NPs on the GO nanosheet surface was confirmed by transmission electron microscopy and Fourier-transform infrared spectroscopy. The adsorption capacity of GO-Fe sub(3)O sub(4) for methylene blue and neutral red cationic dyes was as high as 190.14 and 140.79 mg/g, respectively. The GO-Fe sub(3)O sub(4) hybrids could be reduced to form graphene-Fe sub(3)O sub(4) hybrids by using NaBH sub(4) as reducing agent and be used to prepare magnetic GO films.