pISSN: 1976-4251
eISSN: 2233-4998
About the Journal
Editorial Committee
Information for Authors
Associated Editors
Editorial Office
Current Issues
Article In Press
Search for Archives
Subject   Keyword   Abstract   Author  

CARBONLETT, vol. 25, no. 1, pp.50-54, 2018

DOI: http://dx.doi.org/ DOI:10.5714/CL.2018.25.050

Combination of ultrasonic assisted liquid phase exfoliation process and oxidation-deoxidation method to prepare largesized graphene

Lei Qi, Ruibin Guo, Zunli Mo, Qijun Wu

Affiliation: Northwest Normal University

Abstract: Large-size graphene samples are successfully prepared by combining ultrosonic assisted liquid phase exfoliation process with oxidation-deoxidation method. Different from previous works, we used an ultrasound-treated expanded graphite as the raw material and prepared the graphene via a facile oxidation-reduction reaction. Results of X-ray diffraction and Raman spectroscopy confirm the crystal structure of the as-prepared graphene. Scanning electron microscopy images show that this kind of graphene has a large size (with a diameter over 100 μm), larger than the graphene from graphite powder and flake graphite prepared through single oxidation-deoxidation method. Transmission electron microscopy results also reveal the thin layers of the prepared graphene (number of layers ≤3). Furthermore, the importance of preprocessing the raw materials is also proven. Therefore, this method is an attractive way for preparing graphene with large size.

Keyword: graphene, large size