Synthesis and characterisation of a graphene oxide-gold nanohybrid for use as test material

Taiwo Hassan Akere; Aline M.Z. de Medeiros; Diego Stéfani T. Martinez; Bashiru Ibrahim; Hanene Ali-Boucetta; Eugenia Valsami-Jones

doi:10.3390/nano13010033

Synthesis and characterisation of a graphene oxide-gold nanohybrid for use as test material

Taiwo Hassan Akere, Aline M.Z. de Medeiros, Diego Stéfani T. Martinez, Bashiru Ibrahim, Hanene Ali-Boucetta^*, Eugenia Valsami-Jones^*

^*Corresponding author for this work

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Abstract

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.

Original language	English
Article number	33
Number of pages	16
Journal	Nanomaterials
Volume	13
Issue number	1
DOIs	https://doi.org/10.3390/nano13010033
Publication status	Published - 21 Dec 2022

Bibliographical note

Funding Information:
This research was funded by the Nigerian government through the Petroleum Technology Development Fund (PTDF) scholarships to T.H.A. and B.I. A.M.Z.d.M. and D.S.T.M. thank CAPES and FAPESP foundations for scholarships, respectively, for visiting research at the GEES/UoB. The authors are grateful to CNPEM/LNNano open facilities (AFM, XPS and Nanotox).

Publisher Copyright:
© 2022 by the authors.

Keywords

ecotoxicology
gold
graphene oxide
nanohybrid
nanoparticles
nanotoxicity
Article

ASJC Scopus subject areas

General Chemical Engineering
General Materials Science

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Cite this

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abstract = "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.",

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AU - Ali-Boucetta, Hanene

AU - Valsami-Jones, Eugenia

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N2 - 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.

AB - 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.

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Synthesis and characterisation of a graphene oxide-gold nanohybrid for use as test material

Abstract

Bibliographical note

Keywords

ASJC Scopus subject areas

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