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

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 BaFe₁₂O₁₉ is oily gel. It means that the BaFe₁₂O₁₉ oily gel can enter between the layers of expand graphite. When BaFe₁₂O₁₉ oily gel is self-combusted to form BaFe₁₂O₁₉ 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.