Graphene oxide (GO) nanocolloids-sheets with lateral dimension smaller than 100 nm-were synthesized by chemical exfoliation of graphite nanofibers, in which the graphene planes are coin-stacked along the length of the nanofibers. Since the upper size limit is predetermined by the diameter of the nanofiber precursor, the size distribution of the GO nanosheets is much more uniform than that of co...

Abstract Petroleum coke is a solid, carbonaceous by-product of oil refining and normally used for heating or as an anode in aluminum steel production. These applications contribute to carbon emissions, but here we show that petroleum has another potential avenue: precursor graphene This path presents environmentally economically sustainable use low-value industrial stream. Electrochemical exfol...