▎ 摘　　要

NOVELTY - Preparing three-dimensional graphene aerogel/silver bromide/silver catalyst comprises e.g. (i) placing graphene oxide solution in the container, dropwise adding sodium bisulfite solution under the condition of stirring, continuously stirring for 25-35 minutes, placing the obtained solution into the oven, reacting for 8-14 hours at 70-80 degrees C, then cooling to room temperature to obtain graphene hydrogel, and performing dialysis of graphene hydrogel by de-ionized water for 18-24 hours, and (ii) placing the graphene hydrogel in the cetyl trimethylammonium bromide solution, reacting for 6-6.5 hours at 60-65 degrees C, cooling the reaction system to room temperature, repeatedly washing cetyl trimethylammonium bromide modified graphene hydrogel by de-ionized water and ethanol until there is no obvious bubble. USE - The photo-catalyst is used for photocatalytic sterilization under radiation of visible light (claimed). ADVANTAGE - The photo-catalyst has high activity to kill Escherichia coli. The method has simple process, and mild reaction condition, can realize effectively recycling of material. DETAILED DESCRIPTION - Preparing three-dimensional graphene aerogel/silver bromide/silver catalyst comprises (i) placing graphene oxide solution in the container, dropwise adding sodium bisulfite solution under the condition of stirring, continuously stirring for 25-35 minutes, placing the obtained solution into the oven, reacting for 8-14 hours at 70-80 degrees C, then cooling to room temperature to obtain graphene hydrogel, and performing dialysis of graphene hydrogel by de-ionized water for 18-24 hours, and (ii) placing the graphene hydrogel in the cetyl trimethylammonium bromide solution, reacting for 6-6.5 hours at 60-65 degrees C, cooling the reaction system to room temperature, repeatedly washing cetyl trimethylammonium bromide modified graphene hydrogel by de-ionized water and ethanol until there is no obvious bubble, then placing the CTAB modified graphene hydrogel into silver nitrate solution, reacting at 23-27 degrees C for 12-24 hours, taking out, washing by water, freezing and drying to obtain the three-dimensional graphene aerogel/silver bromide/silver catalyst. An INDEPENDENT CLAIM is also included for three-dimensional graphene aerogel/silver bromide/silver catalyst.