Facile synthesis of graphene nanosheets via barium ferrite assisted intercalation and secondary expansion of graphite

Abstract In this work, we proposed a new method to prepare graphene nanosheets. Expand graphite has large sheet spacing and oil absorption, and the self-combustion precursor of BaFe 12 O 19 is oily gel. It means that the BaFe 12 O 19 oily gel can enter between the layers of expand graphite. When BaFe 12 O 19 oily gel is self-combusted to form BaFe 12 O 19 particles, it has a significant increase in volume. Expand graphite will occur secondary expansion and be peeled into graphene nanosheets. We characterized it by several ways and this is a time-saving, convenient, and low-cost method.