| Article ID | Journal | Published Year | Pages | File Type |
|---|---|---|---|---|
| 1647367 | Materials Letters | 2012 | 4 Pages |
Graphene sheets were prepared from the raw graphite by 67–70% HNO3 oxidation under refluxing at 140 °C for 4 h, followed by the treatment with KOH powder in an automatic mortar at room temperature for 1 h and subjecting to the 1-methyl-2-pyrrolidinone (NMP) solution for exfoliation. The obtained graphene sheets were characterized by transmission electron microscopy (TEM), scanning electron microscopy (SEM), Raman spectroscopy, atom force microscopy (AFM) and X-ray photoelectron spectroscopy (XPS). The KOH in the process was found to play a key role in the preparation of the graphene sheets and can be regarded as a reducing agent.
► A facile method for preparation of graphene sheets was developed. ► The KOH was found to play a key role in preparation of graphene sheets. ► The KOH in the process can be regarded as a reducing agent.
