Scalable production of large single-layered graphenes by microwave exfoliation 'in deionized water'. (August 2018)

• Record Type: Journal Article
• Authors: Kim, Hye-Rim; Lee, Sung-Hyun; Lee, Kun-Hong
• Is Part Of: Carbon. Volume 134(2018)
• Page Start: 431
• Page End: 438
• Publication Date: 2018-08
• Subjects: Carbon -- Periodicals; Carbone -- Périodiques; Koolstof; Toepassingen; Electronic journals; 546.681
• DOI: 10.1016/j.carbon.2018.04.014
• Languages: English
• ISSNs: 0008-6223

Abstract

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 3–6 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. Graphical abstract: Image 1