Please use this identifier to cite or link to this item: http://hdl.handle.net/10397/28145
Title: The attachment of Fe3O4 nanoparticles to graphene oxide by covalent bonding
Authors: He, F
Fan, J
Ma, D
Zhang, L
Leung, CW 
Chan, HL 
Issue Date: 2010
Publisher: Pergamon Press
Source: Carbon, 2010, v. 48, no. 11, p. 3139-3144 How to cite?
Journal: Carbon 
Abstract: Hybrids of graphene oxide (GO) nanosheets and surface-modified Fe 3O4 nanoparticles (NPs) were fabricated by a two-step process. First, Fe3O4 was modified by tetraethyl orthosilicate and (3-aminopropyl) triethoxysilane to introduce amino groups on its surface. Second, the amino groups of Fe3O4 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 3O4 hybrid. The attachment of Fe3O4 NPs on the GO nanosheet surface was confirmed by transmission electron microscopy and Fourier-transform infrared spectroscopy. The adsorption capacity of GO-Fe3O4 for methylene blue and neutral red cationic dyes was as high as 190.14 and 140.79 mg/g, respectively. The GO-Fe 3O4 hybrids could be reduced to form graphene-Fe 3O4 hybrids by using NaBH4 as reducing agent and be used to prepare magnetic GO films.
URI: http://hdl.handle.net/10397/28145
ISSN: 0008-6223
EISSN: 1873-3891
DOI: 10.1016/j.carbon.2010.04.052
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