Graphene (dispersion)

Graphene (dispersion)

Characteristics of Graphene(dispersion):
Size of Graphene flakes: < 3 µm
Thickness: <10 graphene layers
Concentration: 0,1 mg/ml
Solvent and concentration can be changed on request
Type: reduced graphene oxide (prepared by reduction of graphene oxide)

Cost: 0,5 l - RUB 600. (EUR 9)

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Graphene - is a fine-dispersed dark gray powder. Basically, at the micro- and nanoscale, the powder consists of flakes with one to ten graphene layers. Under ultrasound in nonpolar and hydrophobic solvents (predominantly), as well as solvents with affinity for graphene structure, it forms fairly stable dispersions (N-methylpyrrolidone, dimethylformamide, dimethylsulphoxide, chloroform, heptane, as well as isopropanol and etc.). In polar hydrophilic solvents, the dispersions produced by ultrasound are unstable (water, acetone, ethyl alcohol). Store the powder at room temperature in a closed weighing cup.

Brief scheme for graphene production

SEM image of graphene powder

Elemental analysis of graphene, CHN-analysis:
С 91,0±1,0%, H 1,5±0,5%, O 6,0±1,0%
(a significant part of oxygen correspond to surface-adsorbed water; also possible presence of trace amounts of sulfur, less than 0.02%)

XRD- analysis of graphite, graphene oxide and reduced graphene oxide

Review XPS- spectra of graphene oxide (GO - blue) and reduced graphene oxide (RGO-black)