The results of reduction of a composite based on graphene oxide with metal salts introduced into its structure are described. The composite is an extended dense film. Metal cations are bound to the surface of graphene oxide through oxygen functional groups. The material was further reduced chemically and thermally, and also treated in supercritical isopropanol. Processing under supercritical conditions leads to the reduction of graphene oxide, while metal salts are reduced to metal nanoparticles.