Synthesis and characterization of magnetic graphene oxide nanocomposites
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2018
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CONGRESSO BRASILEIRO DE ENGENHARIA E CIÊNCIA DOS MATERIAIS, 23.
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Resumo
Graphene oxide (GO) is a unique material that can be described as a single
monomolecular layer of graphite containing various oxygen functionalities such as
epoxide, carbonyl, carboxyl and hydroxyl groups. Chemical modifications at the
surface of the graphene oxide through the incorporation of magnetite can provide
magnetic properties to these nanomaterials. This work aims to synthesize and
characterize graphene oxide/magnetite (GO/M) nanocomposites, evaluating the
different proportions of incorporated magnetite. The synthesis of graphene
oxide/magnetite nanocomposites was performed by co-precipitation of iron salts on the
graphene oxide (GO) particles in alkaline medium. The characterization of the
nanocomposites was performed by thermogravimetric analysis (TGA), infrared
spectroscopy (FTIR), X-ray diffraction (XRD), nanoparticle tracking analysis (NTA) and
scanning electron microscopy (SEM). The thermogravimetric results showed the
incorporation of approximately 20, 50, 70 and 80% of magnetite to the graphene oxide.
Regarding the hydrodynamic size, for the magnetite, mode values of 31.3 ± 1.3 nm
were determined, whereas for the GO/M, the mode values of size ranged from 72.8 to
194 nm. The results of XRD and FTIR showed the respective characteristic diffraction
and absorption peaks only for graphene oxide, magnetite and GO/M(20%). It was not
observed characteristic peaks for the other samples of graphene oxide that have
higher loads of magnetite incorporated.
Como referenciar
TOMINAGA, F.K.; SAKATA, S.K.; SOARES, J.J.S.; JACOVONE, R.M.S. Synthesis and characterization of magnetic graphene oxide nanocomposites. In: CONGRESSO BRASILEIRO DE ENGENHARIA E CIÊNCIA DOS MATERIAIS, 23., 04-08 de novembro, 2018, Foz do Iguaçu, PR. Resumo... p. 4680-4680. Disponível em: http://repositorio.ipen.br/handle/123456789/29553. Acesso em: 30 Dec 2025.
Esta referência é gerada automaticamente de acordo com as normas do estilo IPEN/SP (ABNT NBR 6023) e recomenda-se uma verificação final e ajustes caso necessário.