A ferroferric oxide–reduced graphene oxide (Fe3O4–rGO) composite is prepared by a facile one-step solvothermal method in which the reduction process of graphene oxide (GO) into rGO was accompanied by the generation of Fe3O4 particles.
An unique rGO/CoNiSx/N–C nanocomposite has been successfully designed and synthesized by a simple one-step carbonization/sulfurization treatment of the rGO/Co–Ni precursor.