Controllable Reduction and Structural Characterizations of Graphene Oxides

doi:10.3969/j.issn.0251-0790.2012.09.005

Abstract

Abstract:

Graphene with different reduction degree was prepared by controling the reduction time. The structures and properties of graphene were characterized systematically by Fourier transform infrared spectroscopy(FTIR), UV-Vis spectroscopy, Raman spectroscopy, X-ray diffrations(XRD), thermo-gravimetric analysis(TGA) and electrical conductivity measurements. Moreover, transmission electron microscopy(TEM), scanning electron microscopy(SEM) and atomic force microscopy(AFM) were employed to compare the morphologies of graphene oxide with those of graphene. The results showed that with the increase of reduction time, the oxygen-containing groups were removed gradually and the absorption peak of ultraviolet displayed a gradual red-shift, besides, the ratio of the Raman intensities(I_D/I_G) of graphene increased markedly, and the thermal stability was improved significantly. The characterization of microstructures reveals that graphene consists of thicker layer structures and more crumples than those of graphene oxide.

Key words: Graphene, Graphene oxide, Reduction

CLC Number:

O613.71

TrendMD:

YANG Xu-Yu, WANG Xian-Bao, LI Jing, YANG Jia, WAN Li, WANG Jing-Chao. Controllable Reduction and Structural Characterizations of Graphene Oxides[J]. Chem. J. Chinese Universities, 2012, 33(09): 1902.

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