Scalable production of large single-layered graphenes by microwave exfoliation 'in deionized water'

Authors
Kim, Hye-RimLee, Sung-HyunLee, Kun-Hong
Issue Date
2018-08
Publisher
PERGAMON-ELSEVIER SCIENCE LTD
Citation
CARBON, v.134, pp.431 - 438
Abstract
Single-layered graphenes with large sizes were produced by inserting solvent molecules between the graphene layers in graphite intercalation compounds (GICs) followed by direct microwave exfoliation 'in a solvent' to prevent re-aggregation. During the microwave exfoliation of GICs in deionized (DI) water, single-layered graphenes were produced, and their lateral sizes ranged from several micrometers to several tens of micrometers. The entire process time was less than 2 h, and toxic compounds were not used. In the case of microwave exfoliation in acetone or ethanol, graphenes with a thickness of 3-6nm were mainly produced rather than single-layered graphenes. In addition, when the produced graphenes were directly dispersed in DI water, the dispersed state was maintained for 2 days. This method is very advantageous for industrial scale-up. (C) 2018 Elsevier Ltd. All rights reserved.
Keywords
GRAPHITE; INTERCALATION; GRAPHITE; INTERCALATION
ISSN
0008-6223
URI
https://pubs.kist.re.kr/handle/201004/121120
DOI
10.1016/j.carbon.2018.04.014
Appears in Collections:
KIST Article > 2018
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