Study of Reduced Graphene Oxide Preparation by Hummers’ Method and Related Characterization

Ning Cao,Yuan Zhang

doi:10.1155/2015/168125

Ning Cao, Yuan Zhang

Open Access

https://doi.org/10.1155/2015/168125

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Abstract

As a novel two-dimensional carbon material, graphene has fine potential applications in the fields of electron transfer agent and supercapacitor material for its excellent electronic and optical property. However, the challenge is to synthesize graphene in a bulk quantity. In this paper, graphite oxide was prepared from natural flake graphite by Hummers’ method through liquid oxidization, and the reduced graphene oxide was obtained by chemical reduction of graphene oxide using NH3·H2O aqueous solution and hydrazine hydrate. The raw material graphite, graphite oxide, and reduced graphene oxide were characterized by X-ray diffraction (XRD), attenuated total reflectance-infrared spectroscopy (ATR-IR), and field emission scanning electron microscope (SEM). The results indicated that the distance spacing of graphite oxide was longer than that of graphite and the crystal structure of graphite was changed. The flake graphite was oxidized to graphite oxide and lots of oxygen-containing groups were found in the graphite oxide. In the morphologies of samples, fold structure was found on both the surface and the edge of reduced graphene oxide.

Highlights

Graphene is a novel 2-dimensional material which was first separated from graphite by mechanical stripping method in 2004 [1]
The diffraction peak at about 2θ = 9.8∘ is very typical for graphite oxide (GO); no apparent diffraction peak could be found for reduced GO (rGO) in its X-ray diffraction (XRD) pattern
The characterization results indicate that the layer spacing of graphite oxide was longer than that of graphite

Summary

Introduction

Graphene is a novel 2-dimensional material which was first separated from graphite by mechanical stripping method in 2004 [1]. There are many ways to synthesize graphene [1, 8, 9], such as exfoliation and cleavage, chemical vapor deposition (CVD), thermal decomposition, and electrochemical reduction. Among these preparation methods, solution-based reduction of graphite oxide (GO) is attractive for its easy operation in recent years. Solution-based reduction of graphite oxide (GO) is attractive for its easy operation in recent years It includes three typical steps in this method. They are graphite oxidation, GO aqueous dispersion, and GO reduction. Hummers’ method was employed to prepare GO and reduced GO (rGO) was obtained with the aid of NH3⋅H2O aqueous and hydrazine hydrate

Graphene Preparation

Result and Discussion

Conclusion