Improved Synthesis of Graphene Oxide

submitted by: mikewilliams
An improved method for the preparation of graphene oxide (GO) is described. Currently, Hummers’ method (KMnO4, NaNO3, H2SO4) is the most common method used for preparing graphene oxide. We have found that excluding the NaNO3, increasing the amount of KMnO4, and performing the reaction in a 9:1 mixture of H2SO4/H3PO4 improves the efficiency of the oxidation process. This improved method provides a greater amount of hydrophilic oxidized graphene material as compared to Hummers’ method or...
Authors: Lawrence Alemany, Alexander Slesarev, Zhengzong Sun, Alexander Sinitskii, Jacob Berlin, Dmitry Kosynkin, Daniela Marcano, James Tour, Wei Lu