期刊
ULTRASONICS SONOCHEMISTRY
卷 58, 期 -, 页码 -出版社
ELSEVIER
DOI: 10.1016/j.ultsonch.2019.104630
关键词
Graphene; Ultrasound; Exfoliation
资金
- Open Research Fund of Zhengzhou Normal University
- China Postdoctoral Science Foundation
- Jiangsu Planned Projects for Postdoctoral Research Funds
Graphene is a two-dimensional material with unique structure and excellent properties. After first being successfully prepared in 2004, it rapidly became a research hotspot in the fields of materials, chemistry, physics, and engineering. Currently, there are many methods for preparing graphene, such as ball milling method, chemical oxidation-reduction, chemical vapor deposition, and liquid-phase exfoliation. Among these methods, liquid-phase exfoliation is the most important preparation method. In this paper, ultrasound-assisted liquid-phase exfoliation is systematically studied. The output power and frequency of the ultrasonic crusher used in the experiment are 100 W and 20 kHz, respectively. Results show that ultrasonic waves can affect the size and thickness distribution of graphene sheets; ultrasound-assisted deoxycholic acid sodium aqueous solution has a good exfoliation effect. In addition, the effects of the 3 liquid-phase systems on preparing graphene are studied, including organic solvent system, aqueous surfactant system, and ionic liquids system; the improvement efforts for ultrasound-assisted liquid-phase exfoliation method are discussed including the exploration of new solvents and optimization of exfoliation process. The application of auxiliary agent-assisted liquid-phase exfoliation method is also discussed.
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