▎ 摘　　要

NOVELTY - Preparing graphene photocatalyst comprises (a) adding graphene oxide into water and dispersing to obtain a graphene oxide dispersion, (b) adding sodium anthraquinone-2-sulfonate into the graphene oxide dispersion to obtain a composite solution, (c) heating the composite solution to obtain a hydrogel, and (d) washing the hydrogel and freeze-drying the hydrogel. USE - The photocatalyst is useful for removing micro-pollutants in wastewater containing chloride ions under illumination conditions (claimed). ADVANTAGE - The photocatalyst has a large specific surface area and pore size, fast electron transfer rate and good sunlight absorption performance, very good purification effect on micro-pollutants in high salt water bodies, and removal rate of sulfadiazine can reach 99%. DETAILED DESCRIPTION - An INDEPENDENT CLAIM is also included for graphene photocatalyst prepared by the above-mentioned method.