▎ 摘　　要

NOVELTY - The method for improving performance of three-dimensional graphene-based composite photocatalytic material, involves (1) mixing 15 ml of 2 mg/mL graphene oxide solution and 2 mL of 60 mg/mL sodium bisulfite solution, transferring to beakers of different diameters, hydrothermally reacting at 70 degrees C for 12 hours to obtain three-dimensional graphene materials with different surface area/volume ratios, (2) immersing three-dimensional graphene material obtained in step (1) in deionized water, washing off excess sodium bisulfite, adding 20 mL of 0.075 mg/mL aqueous solution of eosin, transferring to 25 mL hydrothermal reactor and heating at 120 degrees C for 12 hours to obtain composite, (3) soaking composite in deionized water and washing off unloaded eosin. USE - Method for improving performance of three-dimensional graphene-based composite photocatalytic material used for selective hydrogenation of p-nitroaniline to corresponding aromatic amine-based compound under visible light in aqueous phase and photocatalytic reduction of visible light to remove hexavalent chromium from pollutants (all claimed). ADVANTAGE - The method enables improving performance of three-dimensional graphene-based composite photocatalytic material ensuring excellent photocatalytic effect by simple, environmentally-friendly and easy process.