The attachment of Fe3O4 nanoparticles to graphene oxide by covalent bonding

✍ Scribed by Fuan He; Jintu Fan; Dong Ma; Liming Zhang; Chiwah Leung; Helen Laiwa Chan

• Publisher: Elsevier Science
• Year: 2010
• Tongue: English
• Weight: 413 KB
• Volume: 48
• Category: Article
• ISSN: 0008-6223
• DOI: 10.1016/j.carbon.2010.04.052

✦ Synopsis

Hybrids of graphene oxide (GO) nanosheets and surface-modified Fe 3 O 4 nanoparticles (NPs) were fabricated by a two-step process. First, Fe 3 O 4 was modified by tetraethyl orthosilicate and (3-aminopropyl) triethoxysilane to introduce amino groups on its surface. Second, the amino groups of Fe 3 O 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 3 O 4 hybrid. The attachment of Fe 3 O 4 NPs on the GO nanosheet surface was confirmed by transmission electron microscopy and Fourier-transform infrared spectroscopy. The adsorption capacity of GO-Fe 3 O 4 for methylene blue and neutral red cationic dyes was as high as 190.14 and 140.79 mg/g, respectively. The GO-Fe 3 O 4 hybrids could be reduced to form graphene-Fe 3 O 4 hybrids by using NaBH 4 as reducing agent and be used to prepare magnetic GO films.