According to the market situation of 202 1, some graphene with low purity and poor quality costs tens of yuan each. And some high-purity graphene, the most expensive can buy more than 5000 yuan a gram.

Graphene, as a two-dimensional carbon nano-material, is currently priced in grams, and the price of graphene varies according to its purity.

redox process

Oxidation-reduction method is to use chemical reagents such as sulfuric acid and nitric acid and oxidants such as potassium permanganate and hydrogen peroxide to oxidize natural graphite, increase the spacing between graphite layers, and insert oxides between graphite layers to prepare graphite oxide.

Then, the reactant was washed with water, and the washed solid was dried at a low temperature to prepare graphite oxide powder. Graphene oxide was prepared by stripping graphite oxide powder by physical stripping and high temperature expansion.