Scalable production of large single-layered graphenes by microwave exfoliation 'in deionized water'
- Scalable production of large single-layered graphenes by microwave exfoliation 'in deionized water'
- 이성현; Hye-Rim Kim; Kun-Hong Lee
- Issue Date
- VOL 134-438
- 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– 6  nm 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.
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