▎ 摘　　要

NOVELTY - Hollow reduced graphene oxide/magnesium silicate composite microspheres are obtained by preparing polystyrene microspheres, loading graphene oxide, grafting silica on the surface of the microspheres loaded with graphene oxide to obtain polystyrene-graphene oxide-silica, transferring the product to a PTFE-lined high-pressure reactor, hydrothermally reacting, converting silica into magnesium silicate, reducing graphene oxide to obtain polystyrene-reduced graphene oxide-magnesium silicate, and removing polystyrene microspheres using toluene. USE - Hollow reduced graphene oxide/magnesium silicate composite microspheres are used for adsorbing organic dyes e.g. methylene blue (claimed). ADVANTAGE - The composite microspheres have excellent adsorption capacity, large specific surface area, and low density, and are economical.