An improved technique for the exfoliation of graphene nanosheets and utilization of their nanocomposites as fuel cell electrodes

Official URL: http://dx.doi.org/10.4028/www.scientific.net/KEM.543.9

Graphene nanosheets (GNS) were separated from graphite by an improved, safer and mild method including the steps of oxidation, thermal expansion, ultrasonic treatment and chemical reduction. Graphene nanosheets (GNS) were exfoliated by following two ways. 1st way, the longest exfoliation technique, contained these steps: graphite oxidation, ultrasonic treatment, thermal exfoliation, ultrasonic treatment and chemical reduction. 2nd way, the shortest exfoliation technique, included graphite oxidation, ultrasonic treatment and chemical reduction. Both the reaction procedures with thermal expansion and without thermal expansion led to the formation of GNS.