▎ 摘　　要

NOVELTY - Preparation of a magnetically drivable graphene aerogel composite material involves: 1) mixing iron oxide (Fe3O4) nano particles, bismuth salt, citric acid and deionized water to form a mixed slurry; 2) dropwise adding a hexadecyl trimethyl ammonium bromide solution into the mixed slurry, followed by stirring to form a precursor; 3) drying the precursor to form iron oxide (Fe3O4)/bisdmuth oxybromide (BiOBr); 4) mixing Fe3O4, BiOBr with lysine, graphene oxide and deionized water, followed by performing hydrothermal reaction. USE - The method is used for preparing magnetically drivable graphene aerogel composite used for photocatalytic degradation of inorganic and/or organic pollutant wastewater solutions (claimed). ADVANTAGE - The magnetically driven graphene aerogel composite material prepared is capable of degrading potassium dichromate to 99.8 % within 30 minutes, and is then recycled directly, by the use of a magnet. In the composite material, Fe3O4/BiOBr is evenly embedded between the graphene sheets, to enhance the photocatalytic activity of the composite material. DETAILED DESCRIPTION - An INDEPENDENT CLAIM is included for magnetically drivable graphene aerogel composite material comprising Fe3O4 nanoparticles, BiOBr and graphene. The Fe3O4 nanoparticles are embedded between BiOBr sheets to form Fe3O4/BiOBr heterojunctions anchored between graphene networks.