A facile liquid phase exfoliation method to prepare graphene sheets with different sizes expandable graphite

Journal Article · Sun Sep 01 00:00:00 EDT 2013 · Materials Research Bulletin

DOI:https://doi.org/10.1016/J.MATERRESBULL.2013.04.016· OSTI ID:22341740

Zhou, Keqing; Shi, Yongqian ^[1]; Jiang, Saihua ^[1]; Song, Lei ^[1]; Hu, Yuan ^[1]; Gui, Zhou ^[1]

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1. State Key Laboratory of Fire Science, University of Science and Technology of China, Hefei, Anhui 230026 (China)

Graphical abstract: - Highlights: • This study presented a novel method for the production of high-quality graphene sheets through the exfoliation of Li-intercalated EG with sonication. • The quality of the graphene sheets produced from different sizes EG was compared for the first time and the formation mechanism was discussed. • The graphene sheets obtained from the small size EG have less layers than the large size EG. - Abstract: In this work, graphene sheets suspension were synthesized directly from expandable graphite (EG) via an intercalation and exfoliation pathway using n-butyl lithium as the intercalating agent, water and N,N-dimethylformamide (DMF) as the exfoliating agent. The quality of the graphene sheets produced from different sizes EG was compared and the formation mechanism was discussed. The formation of the graphene sheets and its formation mechanism were confirmed by transmission electron microscopy (TEM), high-resolution TEM (HRTEM), selected area electron diffraction (SAED), Raman spectroscopy measurement, inductively coupled plasma atomic emission spectrometry (ICP-AES) and thermogravimetric analysis (TGA). The graphene sheets obtained from the small size EG have less layers than the large size EG.

• OSTI ID: 22341740
• Journal Information: Materials Research Bulletin, Vol. 48, Issue 9; Other Information: Copyright (c) 2013 Elsevier Science B.V., Amsterdam, The Netherlands, All rights reserved.; Country of input: International Atomic Energy Agency (IAEA); ISSN 0025-5408
• Country of Publication: United States
• Language: English

Related Subjects

36 MATERIALS SCIENCE
37 INORGANIC
ORGANIC
PHYSICAL AND ANALYTICAL CHEMISTRY
77 NANOSCIENCE AND NANOTECHNOLOGY
AUGER ELECTRON SPECTROSCOPY
CLATHRATES
ELECTRON DIFFRACTION
EMISSION SPECTROSCOPY
GRAPHENE
GRAPHITE
LAYERS
LIQUIDS
LITHIUM
NANOSTRUCTURES
RAMAN SPECTROSCOPY
THERMAL GRAVIMETRIC ANALYSIS
TRANSMISSION ELECTRON MICROSCOPY