High-efficiency exfoliation of large-area mono-layer graphene oxide with controlled dimension.

Citation data:

Scientific reports, ISSN: 2045-2322, Vol: 7, Issue: 1, Page: 16414

Publication Year:
2017
Captures 29
Readers 29
Citations 1
Citation Indexes 1
Repository URL:
http://scholarworks.unist.ac.kr/handle/201301/23118
PMID:
29180740
DOI:
10.1038/s41598-017-16649-y
Author(s):
Park, Won Kyu; Yoon, Yeojoon; Song, Young Hyun; Choi, Su Yeon; Kim, Seungdu; Do, Youngjin; Lee, Junghyun; Park, Hyesung; Yoon, Dae Ho; Yang, Woo Seok
Publisher(s):
Springer Nature; NATURE PUBLISHING GROUP
Tags:
Multidisciplinary
article description
In this work, we introduce a novel and facile method of exfoliating large-area, single-layer graphene oxide using a shearing stress. The shearing stress reactor consists of two concentric cylinders, where the inner cylinder rotates at controlled speed while the outer cylinder is kept stationary. We found that the formation of Taylor vortex flow with shearing stress can effectively exfoliate the graphite oxide, resulting in large-area single- or few-layer graphene oxide (GO) platelets with high yields (>90%) within 60 min of reaction time. Moreover, the lateral size of exfoliated GO sheets was readily tunable by simply controlling the rotational speed of the reactor and reaction time. Our approach for high-efficiency exfoliation of GO with controlled dimension may find its utility in numerous industrial applications including energy storage, conducting composite, electronic device, and supporting frameworks of catalyst.