Large Scale Production of Graphene Oxide

Sulphuric acid is used for the oxidation of graphite. The un-reacted acid is stored in a tank, so, there is no environmental concern. Graphene oxide is not toxic and hazardous for the environment.

Production yield = 80% Thickness = 1-1.8 nm Number of layers: Few layer (3-4 layers) Dispersible in water and most of the polar organic solvents Oxygen content = 25-28%

Graphene oxide is extensively used in energy storage devices, polymer composites, desalination of water, conducting ink, aqueous lubrication, nano-coolant, additive for phase change materials, etc. Problem being addressed: The cost of commercially available graphene oxide is very high (Rs. 35,000 for 0.2 g) and thus it is very difficult to use it in the aforesaid areas. Therefore, scaled-up production of graphene oxide at reasonable price without compromising the quality is a challenging task. The developed technology demonstrates the production of graphene oxide starting from natural flake graphite (200 g/batch) without pre-treatment.