Abstract: Graphene is a two-dimensional material with unique structure and excellent properties. Since it was successfully prepared for the first time in 2004, graphene has become a hot point of many fields such as materials, chemistry, physics and engineering. Presently, several preparation methods of graphene have been reported, including chemical oxidation-reduction, chemical vapor deposition(CVD) and liquid-phase exfoliation(LPE), etc. Among them, LPE is an important way to realize industrialization. This review article mainly summarizes the recent researches about the LPE with ultrasonic. The effect of ultrasonic is simply explained and the LPE through pure solvents or binary solvents, and the LPE with additives are summarized. Furthermore, the mechanisms of different ways are discussed. Finally, several methods to improve the exfoliation efficiency are proposed and the way of choosing new solvents or additives is pointed out, aiming at providing references for developing more effective exfoliation systems or new methods to prepare high quality graphene more effectively.
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2017, Vol. 31 
