▎ 摘　　要

NOVELTY - Magnetic fluorescent composite material based on phenol formaldehyde resin comprises graphene oxide and iron oxide-phenol formaldehyde resin (PFR) nanoparticles. USE - Magnetic fluorescent composite material based on phenol formaldehyde resin. DETAILED DESCRIPTION - An INDEPENDENT CLAIM is included for preparation of magnetic fluorescent composite material based on phenol formaldehyde resin comprising using triethylene glycol as solvent and trivalent iron salt as iron source, heating in sodium hydroxide and acrylic resin at 210-230 degrees C for 1-2 hours to obtain iron oxide nanoparticles, mixing iron oxide nanoparticles with solution of hexamethylenetetramine and phenol, heating at 150-170 degrees C, reacting for 5-7 hours, washing, drying, grinding to obtain powdery core-shell iron oxide-PFR nanoparticles, adding sodium polystyrene sulfonate, polyethyleneimine and polystyrene sulfonate, introducing carboxyl functional groups to obtain carboxylated iron oxide-PFR nanoparticles, mixing 2-(N-morpholino) ethanesulfonic acid buffer, 1-(3-dimethylaminopropyl)-3-ethylcarbodiimide and hydroxysuccinimide, condensing terminal amidated polyethylene glycol to carboxylated iron oxide-PFR nanoparticles by amide bond surface to obtain terminal aminated polyethylene glycol modified iron oxide-PFR nanoparticles, preparing graphene oxide by Hummer method, converting graphene oxide to obtain carboxylated graphene oxide, adding 2-(N-morpholino) ethanesulfonic acid buffer in 1-(3-dimethylaminopropyl)-3-ethylcarbodiimide and hydroxysuccinimide and supporting terminal amidated polyethylene glycol modified iron oxide-PFR nanoparticles on the surface of carboxylated graphene oxide.