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

서지정보

ㆍ발행기관 : 한국탄소학회 ㆍ수록지정보 : Carbon letters / 25권
ㆍ저자명 : Lei Qi, Ruibin Guo, Zunli Mo, Qijun Wu

목차

Abstract
1. Introduction
2. Experimental
2.1. Materials
2.2. Preparation of ultrasound-treated expandedgraphite
2.3. Preparation of GO
2.4. Preparation of large-sized graphene
2.5. Characterization
3. Results and Discussion
4. Conclusions
Conflict of Interest
Acknowledgements
References

영어 초록

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.

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