▎ 摘　　要

NOVELTY - Method for preparing sandwich nanostructure composite adsorbent involves (a) adding hollow porous organic polymer microspheres to deionized water, and ultrasonically dispersing uniformly to obtain an aqueous solution of hollow porous organic polymer microspheres, and (b) dripping the graphene oxide aqueous solution to the hollow porous organic polymer microsphere aqueous solution, dispersing uniformly by ultrasonic, adding aqueous ammonia and hydrazine hydrate solution, heating, washing the reaction product and drying to obtain the product. USE - The method is useful for preparing sandwich nanostructure composite adsorbent, which is useful in industrial wastewater applications (all claimed). ADVANTAGE - The adsorbent has consistent adsorption performance, prevents irreversible agglomeration of graphene, helps to form three-dimensional open structure, facilitates penetration of dyes, and improves adsorption performance.