▎ 摘　　要

NOVELTY - Microchip comprises graphene sheet structure and network structure that connects the graphene sheets, where the graphene sheet structure comprises at least two layers of graphene, the network structure is terminated by a graphene sheet structure in one end, and connected to another graphene layer structure adjacent to each other in other end, and an organic molecular material is interconnected between main portion of molecular chains. USE - The microchip is useful in sewage treatment, seawater desalination, and purification of drinking water. ADVANTAGE - The microchip has good stability, and high adsorption rate, and is suitable for heavy metal adsorption. DETAILED DESCRIPTION - An INDEPENDENT CLAIM is included for method for preparing the microchip which involves (a) peeling graphite to obtain graphene microchip, oxidizing microchip by Hummers method or modified Hummers method, dispersing oxidized graphene microchip in water, adding ethylenediamine, o-phenylenediamine, p-phenylenediamine, acrylamide, vinyl alcohol, and acrylic-coated bentonite to dispersed microchip, allowing mixture to react with chip at 80-11 degrees C for 6-12 hours, and magnetically stirring reaction product to obtain a mixed liquid, and (b) subjecting mixed liquid to vigorous stirring and centrifugal separation, filtering light fraction to obtain a solid which is a precursor, and subjecting precursor to a reduction reaction with hydrogen gas under an inert gas atmosphere.