Issue 15, 2016

High shear-induced exfoliation of graphite into high quality graphene by Taylor–Couette flow

Abstract

The development of an industrially scalable method to produce large quantities of high quality graphene is essential for its practical application in electronics, composite materials, and energy storage devices. Here, we report a method for bulk preparation of few-layer graphene by shear exfoliation of graphite in liquids. We showed that high shear mixing of graphite and solvent in the Taylor vortex flow regime resulted in an efficient exfoliation of graphite into few-layer graphene with a high yield. According to Raman spectroscopy and X-ray photoelectron spectroscopy, the exfoliated graphene flakes were found to exhibited a low oxidation degree and a low content of defects. Optimization of Taylor flow processing parameters based on computational fluid dynamics (CFD) studies further improved the efficiency of graphite exfoliation, thereby achieving an overall yield of up to ∼5%. The described Taylor flow-based shear exfoliation of graphite may have great potential to produce high quality graphene on an industrially accessible scale.

Graphical abstract: High shear-induced exfoliation of graphite into high quality graphene by Taylor–Couette flow

Associated articles

Supplementary files

Article information

Article type
Paper
Submitted
24 Oct 2015
Accepted
20 Jan 2016
First published
25 Jan 2016

RSC Adv., 2016,6, 12003-12008

High shear-induced exfoliation of graphite into high quality graphene by Taylor–Couette flow

T. S. Tran, S. J. Park, S. S. Yoo, T. Lee and T. Kim, RSC Adv., 2016, 6, 12003 DOI: 10.1039/C5RA22273G

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