超声波辅助二元溶剂剥离制备石墨烯<sup>*</sup>

doi:10.11896/j.issn.1005-023X.2017.09.009

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Abstract This paper reports two binary-solvent systems, i.e. dimethylformamide/n-butylalcohol system and dimethylformamide/ethanol system that facilitate higher concentration and improved stability of graphene dispersion. Hydrogen bond was introduced to explain the exfoliation mechanism and stabilizing mechanism. At the same time, it was found that Hansen solubility theory was not suitable for the chosen binary solvent systems. Furthermore, the topography and nanostructure of graphene were characterized by atomic force microscopy (AFM), transmission electron microscopy (TEM) and Raman spectroscopy. The absorbance coefficient of graphene dispersion was obtained by UV-Vis spectra. Finally, a graphene dispersion that predominantly containing single-layer graphene was obtained after 6 000 r/min centrifugation.

Key words： graphene ultrasonic binary solvents exfoliation

Published: 10 May 2017 Online: 2018-05-03

CLC number:

TQ127.1

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	QI Shuai
	HUANG Guoqiang

Cite this article:

QI Shuai,HUANG Guoqiang. Preparation of Graphene by Ultrasonic-assisted Exfoliation of Graphite in Binary Solvents[J]. Materials Reports, 2017, 31(9): 72-76.

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https://www.mater-rep.com/EN/10.11896/j.issn.1005-023X.2017.09.009 OR https://www.mater-rep.com/EN/Y2017/V31/I9/72

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