Antibacterial activity of graphene oxide/silver nanocomposite synthesized by sustainable process
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2018
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WORKSHOP ON ENVIRONMENTAL NANOTECHNOLOGY, 3rd
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Graphene oxide/silver nanocomposite has excellent antimicrobial properties [1]. The traditional methods of
incorporation of metal in graphene oxide usually require toxic reagents or with long periods of reaction and in
high temperature [2]. The objective of this study is to develop an innovative and sustainable method of
incorporating silver into graphene oxide by electron beam. This methodology does not involve toxic reagents or
residues and it is carried out in a short reaction time at room temperature. Dispersed graphene oxide was mixed
with silver in the complex form in water- isopropanol solution. The mix was submitted to a dose of radiation
varying between 150 and 400 KGy. The nanocomposite GO/Ag characterization was performed by
thermogravimetry analysis (TGA), X-ray diffraction (XDR), scanning transmission electron microscope coupled
to the energy dispersive X-ray spectrometry (TEM/EDS). The antibacterial activity of GO/Ag was observed
against Gram negative, Escherichia coli by plate count method. The viable cells of GO and GO-Ag was determined
by plating the inoculum after 4h of exposure to different concentrations of the nanomaterials (10, 50, 100, 200
and 500 μg/mL). The results showed that for 500 μg/mL of GO, inactivation cells were ca of 5,4 %, while for GOAg,
the concentration to inactivate all cell were 5 times lower (100 μg/mL). The silver nanoparticles size range
from 20 to 50 nm. This work showed that GO/Ag nanocomposites that were widely studied by their antibacterial
properties can be produce by ionizing radiation. This is a sustainable method that does not require toxic reagents
and does not generate hazardous wastes. The short reaction time of some minutes and the ambient temperature
also make the process attractive.
Como referenciar
JACOVONE, R.M.S.; SOARES, J.J.S.; SOUSA, T.S.; RODRIGUES, D.F.; SILVA, F.R.O.; GARCIA, R.H.L.; VICENTE, E.J.; SAKATA, S.K. Antibacterial activity of graphene oxide/silver nanocomposite synthesized by sustainable process. In: WORKSHOP ON ENVIRONMENTAL NANOTECHNOLOGY, 3rd, October 5-8, 2018, Sorocaba, SP. Abstract... p. 85-85. Disponível em: http://repositorio.ipen.br/handle/123456789/30124. Acesso em: 15 Mar 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.