Preparation of graphene by the exfoliation of graphite by bronsted acids without oxidation. Graphite powder was mixed thoroughly with H 3 PO 4 with the concentration of 0.4- 0.5 g/ml. the solution was then drop- casted on a clean glass plate. The mixture was dried in air atmosphere at 120–140 °C. The drying temperature was chosen to be below the acid decomposition point but high enough to enable drying within a reasonable period of time. The reaction products were black powders. Exfoliation of the intercalated graphite/H3PO4 was performed by dispersion of ∼1 mg/ml in DMF. The suspension was then sonicated for 30 min at ambient temperature. The resulting solution was decanted to separate larger black particles. Drop casted on glass plate Air dry at 120– 140 °C Black powder Sonicated for 30 min in DMF Graphite powder H 3 PO 4 Mixed thoroughly Exfoliate d graphite Intercalated graphite/H PO
Preparation of graphene by the exfoliation of graphite by
bronsted acids without oxidation.Graphite powder was mixed
thoroughly with H3PO4 with the concentration of 0.4- 0.5 g/ml. the
solution was then drop-casted on a clean glass plate. The mixture
was dried in air atmosphere at 120140 C. The drying temperature was
chosen to be below the acid decomposition point but high enough to
enable drying within a reasonable period of time. The reaction
products were black powders. Exfoliation of the intercalated
graphite/H3PO4 was performed by dispersion of 1 mg/ml in DMF. The
suspension was then sonicated for 30 min at ambient temperature.
The resulting solution was decanted to separate larger black
particles.Drop casted on glass plateAir dry at 120140 CBlack
powderSonicated for 30 min in DMFGraphite powder H3PO4Mixed
thoroughly Exfoliated graphiteIntercalated graphite/H3PO4
Scheme. 1. Schematic for graphene preparation.Reference:Nina I.
Kovtyukhovaet al. Non-oxidative intercalation and exfoliation of
graphite by Brnsted acids Nature Chemistry6, pages 957-963,(2014)
doi:10.1038/nchem.2054.
