▎ 摘　　要

NOVELTY - Preparation of molybdenum disulfide monolayer flake doped graphene composite film includes taking molybdenum disulfide as raw material for lithium ion plugging layer in molybdenum disulfide monolayer, preparing molybdenum disulfide monolayer dispersed in deionized water; carrying out Hummers method; vacuum drying; and using the obtained doped vulcanized molybdenum disulfide as oxidized graphene composite film set in hydroiodic solution and reducing, taking out, and cleaning to obtain doped monolayer of vulcanized molybdenum disulfide and graphene composite film. USE - Method for preparing molybdenum disulfide monolayer flake doped graphene composite film (claimed) used in the field of photocatalysis, electrocatalysis, hydrogen evolution catalysis, and supercapacitor. ADVANTAGE - The method is simple and easy for industrial production. DETAILED DESCRIPTION - Preparation of a single-layer molybdenum disulfide flake doped graphene composite film comprises: (A) taking molybdenum disulfide as raw material by lithium ion plugging layer in molybdenum disulfide monolayer, preparing molybdenum disulfide monolayer dispersed in deionized water by water bath ultrasonic cell crushing and peeling off to obtain a uniform dispersion of molybdenum disulfide monolayer, where a molybdenum disulfide monolayer dispersed in deionized water to a concentration of 0.01-1 mg/ml; (B) using graphite powder as raw material in Hummers method to prepare graphite oxide, dispersing graphite oxide in deionized water, sonicating to obtaining uniform oxidized graphene dispersion liquid, where the oxidized graphite alkene is dispersed in deionized water at a concentration of 0.01-10 mg/ml; (C) taking the obtained molybdenum disulfide monolayer dispersion liquid and oxidized graphene dispersion liquid at a volume ratio of 1:1-1:5, mixing, sonicating to obtain uniform mixture of molybdenum disulfide monolayer and oxidized graphene dispersion liquid, pumping the mixture from PTFE filter into thin film, and vacuum drying to obtain doped monolayer of two vulcanized molybdenum piece as oxidized graphene composite film; and (D) using the obtained doped second vulcanized molybdenum piece as oxidized graphene composite film set in hydroiodic solution and reducing for 2-24 hours, taking out, and cleaning to obtain doped monolayer of two vulcanized molybdenum piece and graphene composite film.