▎ 摘　　要

NOVELTY - Preparation of phenyl-modified magnetic graphene/mesoporous silica composite material comprises dispersing magnetic graphite and hexadecyl trimethyl ammonium bromide in deionized water, adding sodium hydroxide, ultrasonically dispersing, heating at 50-60 degrees C, stirring 30-60 minutes, adding with ethanol, mixture of tetraethyl orthosilicate and phenyl triethoxysilane, continuously stirring for 10-12 hours, magnetically separating, washing with deionized water, refluxing, removing template agent, vacuum freezing at - 55 to - 50 degrees C, and drying to obtain the product. USE - Method of preparation of phenyl-modified magnetic graphene/mesoporous silica composite material used as solid phase extracting agent in treatment of wastewater of pesticide (claimed). ADVANTAGE - The material has quick absorption speed, and good adsorption efficiency. DETAILED DESCRIPTION - Preparation of phenyl-modified magnetic graphene/mesoporous silica composite material comprises dispersing graphene oxide in ethanediol, ultrasonically peeling for 0.5-1 hours, adding iron chloride hexahydrate, ultrasonically dispersing, stirring at 30-40 degrees C for 2-3 hours, adding with sodium acetate and polyethylene glycol, continuously stirring for 0.5-1 hours, reacting at 180-200 degrees C for 20-24 hours in reaction kettle, washing with alcohol, vacuum drying, and obtaining magnetic graphite; and dispersing magnetic graphite and hexadecyl trimethyl ammonium bromide in deionized water, adding sodium hydroxide, ultrasonically dispersing, heating at 50-60 degrees C, stirring 30-60 minutes, adding with ethanol, mixture of tetraethyl orthosilicate and phenyl triethoxysilane, continuously stirring for 10-12 hours, magnetically separating, washing with deionized water, refluxing, removing template agent, vacuum freezing at - 55 to - 50 degrees C, and drying to obtain the product.