Graphene oxide is made of a single-layer graphene sheet having covalent bonds to oxygen functional groups on base planes and edges of the sheet. The edges consist of carboxyl, phenol, lactone, quinone, and carbonyl groups, while the basal plane has hydroxyl and epoxy groups. They have easy sentences with various properties, including electrical resistance, high thermal insulation properties. Exhibit high solubility and possibility for surface functionalization; therefore are used in nanocomposite materials. GO membranes are useful in water treatment applications and are also effective fillers for polymer nanocomposites.