Structure and Properties of Chemically-reduced Functionalized Graphene Oxide Platelets

doi:10.1016/j.jmst.2014.10.011

Abstract

Abstract: Green reduction of graphene oxide (GO) functionalized with 3-aminopropyltriethoxysilane and 1-ethyl-3-(3-dimethylaminopropyl) carbodiimide hydrochloride/N-hydroxysuccinimide was performed by using ascorbic acid and sodium bisulfite. The obtained materials were characterized by thermo-gravimetric analysis, transmission electron microscopy, X-ray diffraction, UV?Vis, Fourier transform infrared and Raman spectroscopy techniques. The results indicated a strong dependence of the materials properties such as deoxygenation degree, absorption peak shift, crystallite size and functionalization degree on the functionalization approach and reducing agent.

Key words: Covalent functionalization, Graphene oxide, Reduction, Ascorbic acid, Sodium bisulfite

A. Pruna, D. Pullini, D. Busquets. Structure and Properties of Chemically-reduced Functionalized Graphene Oxide Platelets[J]. J. Mater. Sci. Technol., 2015, 31(5): 458-462.

Figures/Tables 7

FTIR spectra of GO upon functionalization.

FTIR spectra of functionalized GO upon reduction with ascorbic acid.

XRD patterns of GO and functionalized GO upon reduction with ascorbic acid.

TGA plots for GO upon reduction with ascorbic acid and sodium bisulfite.

Comparison of absorption spectra of GO (a), f1GO (b) and f2GO (c) upon reduction with ascorbic acid (r1) and sodium bisulfite (r2).

Raman spectra of GO upon functionalization (a), graphene materials upon reduction with ascorbic acid (b) and sodium bisulfite (c) as depending on functionalization.

TEM images of r1f1GO (a), r1f2GO (b) and r2f2GO (c).

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