Nano Archive

Solvothermal-assisted exfoliation process to produce graphene with high yield and high quality

Qian, Wen and Hao, Rui and Hou, Yanglong and Tian, Yuan and Shen, Chengmin and Gao, Hongjun and Liang, Xuelei (2009) Solvothermal-assisted exfoliation process to produce graphene with high yield and high quality. Nano Research, 2 (9). pp. 706-712.

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Abstract

Monolayer and bilayer graphene sheets have been produced by a solvothermal-assisted exfoliation process in a highly polar organic solvent, acetonitrile, using expanded graphite (EG) as the starting material. It is proposed that the dipole-induced dipole interactions between graphene and acetonitrile facilitate the exfoliation and dispersion of graphene. The facile and effective solvothermal-assisted exfoliation process raises the low yield of graphene reported in previous syntheses to 10 wt%–12 wt%. By means of centrifugation at 2000 rpm for 90 min, monolayer and bilayer graphene were separated effectively without the need to add a stabilizer or modifier. Electron diffraction and Raman spectroscopy indicate that the resulting graphene sheets are high quality products without any significant structural defects.

Item Type:Article
Subjects:Material Science > Nanofabrication processes and tools
Material Science > Nanochemistry
Material Science > Nanostructured materials
ID Code:8801
Deposited By:CSMNT
Deposited On:26 Aug 2010 08:39
Last Modified:26 Aug 2010 08:39

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