Graphene oxide (graphene oxide) is the oxide of graphene. It is generally represented by GO, and its color is brownish yellow. Common products on the market include powder, flake and solution. After being oxidized, the oxygen-containing functional groups on it increase and make the properties more active than graphene, and its properties can be improved through various reactions with oxygen-containing functional groups.
Graphene oxide flakes are the product of graphite powder after chemical oxidation and exfoliation. Graphene oxide is a single atomic layer that can be extended to tens of microns in lateral size at any time. Therefore, its structure crosses the typical scales of general chemistry and materials science. Graphene oxide can be regarded as an unconventional type of soft material, with the characteristics of polymers, colloids, films, and amphiphilic molecules. Graphene oxide has long been regarded as a hydrophilic substance because of its superior dispersibility in water. However, relevant experimental results show that graphene oxide is actually amphiphilic, showing hydrophilicity from the edge to the center of the graphene sheet To hydrophobic property distribution. Therefore, graphene oxide can exist at the interface like a surfactant, and reduce the energy between the interfaces. Its hydrophilicity is widely recognized.