Synthesis and Characterisation of a Graphene Oxide-Gold Nanohybrid for Use as Test Material

This paper reports the synthesis and characterization of a graphene oxide-gold nanohybrid (GO-Au) and evaluates its suitability as a test material, e.g., in nano(eco)toxicological studies. In this study, we synthesised graphene oxide (GO) and used it as a substrate for the growth of nano-Au decorati...

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Bibliographic Details
Published in:Nanomaterials (Basel, Switzerland) Switzerland), 2022-12, Vol.13 (1), p.33
Main Authors: Akere, Taiwo Hassan, de Medeiros, Aline M Z, Martinez, Diego Stéfani T, Ibrahim, Bashiru, Ali-Boucetta, Hanene, Valsami-Jones, Eugenia
Format: Article
Language:English
Subjects:
Acids
Analysis
Carbon
Chemical reduction
Chemical synthesis
ecotoxicology
Fourier transform infrared spectroscopy
Gold
Graphene
graphene oxide
Hydrogen peroxide
Identification and classification
Medical equipment
Methods
nanohybrid
Nanomaterials
Nanoparticles
Nanotechnology
nanotoxicity
Oxides
Potassium
Properties
Raman spectroscopy
Sodium citrate
Spectrum analysis
Structure
Substrates
Toxicity testing
X ray photoelectron spectroscopy
X-ray spectroscopy
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Summary:This paper reports the synthesis and characterization of a graphene oxide-gold nanohybrid (GO-Au) and evaluates its suitability as a test material, e.g., in nano(eco)toxicological studies. In this study, we synthesised graphene oxide (GO) and used it as a substrate for the growth of nano-Au decorations, via the chemical reduction of gold (III) using sodium citrate. The GO-Au nanohybrid synthesis was successful, producing AuNPs (~17.09 ± 4.6 nm) that were homogenously distributed on the GO sheets. They exhibited reproducible characteristics when characterised using UV-Vis, TGA, TEM, FTIR, AFM, XPS and Raman spectroscopy. The nanohybrid also showed good stability in different environmental media and its physicochemical characteristics did not deteriorate over a period of months. The amount of Au in each of the GO-Au nanohybrid samples was highly comparable, suggesting a potential for use as chemical label. The outcome of this research represents a crucial step forward in the development of a standard protocol for the synthesis of GO-Au nanohybrids. It also paves the way towards a better understanding of the nanotoxicity of GO-Au nanohybrid in biological and environmental systems.
ISSN:2079-4991
2079-4991
DOI:10.3390/nano13010033