▎ 摘　　要

NOVELTY - Preparing quantum dots and fluorescent molecules doped graphene biosensor involves using the improved Hummers method to prepare graphene oxide/reduced graphene oxide, and preparing graphene oxide/reduced graphene oxide solution, cleaning and wiping the silicon dioxide flakes, removing organic matter on the surface, and coating the silicon dioxide flakes to prepare a layer of graphene oxide or graphene film as the dioxide Silicon composite graphene sensor matrix. The graphene quantum dots are prepared using graphene oxide/reduced graphene oxide, graphene quantum dots and fluorescent molecules are self-assembled into a composite film, and graphene oxide/reduced graphene oxide is used to prepare graphene quantum dots and graphene by solvothermal method quantum dots and fluorescent dyes are self-assembled in solution to obtain product. USE - Method for preparing quantum dots and fluorescent molecules doped graphene biosensor used for detecting trace viruses. ADVANTAGE - The method enables to prepare quantum dots and fluorescent molecules doped graphene biosensor reaches 10 PPb level (mass concentration) highest detection precision 3PPb molecular concentration.