Explosive Synthesis of High-Performance MgO/Graphene Nanocomposites for Efficient Solar Photocatalysis

Magnesium oxide (MgO)/graphene nanocomposites were prepared via an explosion method by using graphene oxide (GO) and Mg(OH)₂ as raw materials. Moreover, the simulated solar photocatalytic degradation performance of methylene blue (MB) was studied under different GO contents. The reduction of GO and the decomposition of Mg(OH)₂ occurred simultaneously during explosion. According to characterization analyses, MgO nanoparticles were loaded well onto the graphene nanosheets. Photocatalytic experiments showed that the surface of the MgO/graphene composites exhibited excellent photocatalytic performance. The MgO/graphene composites demonstrated the best photocatalytic activity at a high concentration (80 mg/L) of MB under simulated sunlight, and the degradation rate reached 99.6% after 45 min of illumination.