▎ 摘　　要

NOVELTY - Preparing graphene photocatalyst comprises: (S1) adding graphene oxide into water and dispersing to obtain graphene oxide dispersion liquid; (S2) adding sodium anthraquinone-2-sulfonate into the obtained graphene oxide dispersion liquid to obtain a composite solution; (S3) heating the obtained composite solution to obtain hydrogel; and (S4) washing and freeze-drying the obtained hydrogel to obtain the graphene photocatalyst. USE - The method is useful for preparing graphene photocatalyst, which is used: in wastewater treatment; and for removing micropollutants in wastewater containing chloride ions under illumination conditions (all claimed). ADVANTAGE - The method: provides graphene photocatalyst, which efficiently degrade and remove micropollutants in wastewater, has large specific surface area and pore size, can enrich micropollutants in water, has fast electron transfer rate and good sunlight absorption performance, is beneficial to improving the photocatalytic degradation performance of pollutants, and also has a very good purification effect on micropollutants in high-salinity water; and is simple, easy to recycle and reuse, and convenient for large-scale production and application. DETAILED DESCRIPTION - An INDEPENDENT CLAIM is also included for the graphene photocatalyst prepared by the preparation method.