Sodium citrate: A universal reducing agent for reduction / decoration of graphene oxide with au nanoparticles |
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Authors: | Zhe Zhang Huihui Chen Chunyan Xing Mingyi Guo Fugang Xu Xiaodan Wang Hermann J Gruber Bailin Zhang Jilin Tang |
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Affiliation: | (1) Center of Special Materials and Technology, Fudan University, Shanghai, 200433, China; |
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Abstract: | A facile method is proposed for the synthesis of reduced graphene oxide nanosheets (RGONS) and Au nanoparticle-reduced graphene
oxide nanosheet (Au-RGONS) hybrid materials, using graphene oxide (GO) as precursor and sodium citrate as reductant and stabilizer.
The resulting RGONS and Au-RGONS hybrid materials were characterized by UV-vis spectroscopy, X-ray photoelectron spectroscopy,
Fourier transform infrared spectroscopy, Raman spectroscopy, atomic force microscopy, transmission electron microscopy, and
X-ray diffraction. It was found that the RGONS and Au-RGONS hybrid materials formed stable colloidal dispersions through hydrogen
bonds between the residual oxygen-containing functionalities on the surface of RGONS and the hydroxyl/carboxyl groups of sodium
citrate. The electrochemical responses of RGONS and Au-RGONS hybrid material-modified glassy carbon electrodes (GCE) to three
kinds of biomolecules were investigated, and all of them showed a remarkable increase in electrochemical performance relative
to a bare GCE.
![MediaObjects/12274_2011_116_Fig1_HTML.gif](/content/667J311011131N42/MediaObjects/12274_2011_116_Fig1_HTML.gif) |
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Keywords: | Graphene nanosheets sodium citrate Au nanoparticles hybrid materials electrocatalysis |
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