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

By Wen Qian, Rui Hao, Yanglong Hou, Yuan Tian, Chengmin Shen, Hongjun Gao, Xuelei Liang. 2009

222 citations recorded by the source corpus.

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.

Subfields: Electrical and Electronic Engineering, Materials Chemistry

View Paper: https://www.semanticscholar.org/paper/8e9dffbf0257bd7cbb243855913203c6f552d4f8

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In Electrical and Electronic Engineering

In Materials Chemistry

Citations in the corpus

Production and processing of graphene and related materials (2020, methodology): “In a typical LPE experiment, the bulk crystal is immersed into a liquid and subjected to sonication [113, 157-160], shear mixing [161, 162], microfluidization [163], ball milling [164] or similar [165, 166].”
Ink-based 3D printing technologies for graphene-based materials: a review (2019, methodology): “[123] produced graphene via a solvothermal-assisted exfoliation in the presence of acetonitrile (Fig.”
Efficient and large-scale synthesis of few-layered graphene using an arc-discharge method and conductivity studies of the resulting films (2010, methodology): “Recently, new methods have been employed to prepare graphene sheets with one, two or more layers, such as arc-discharge techniques [18–20], chemical vapor deposition [21–23], microwave irradiation [24], solvothermal-assisted exfoliation [25] and bottom-up methods [26].”