▎ 摘　　要

NOVELTY - Preparing a mesoporous nitrogen-doped graphene-loaded molybdenum disulfide by laser irradiation involves: (1) putting graphene oxide into absolute ethanol, ultrasonically crushing and evenly dispersing into a suspension, pouring into a reaction kettle, and irradiating under constant magnetic stirring to obtain graphene oxide; (2) centrifuging the laser irradiated graphene oxide, washing and dispersing the precipitate in deionized water for freeze-drying; (3) dispersing freeze-dried and laser irradiated graphene oxide and ammonium tetrathiomolybdate in N,N-dimethylformamide, then adding urea, carrying out ultrasonic dispersion, adding hydrazine hydrate, and continuously carrying out ultrasonic treatment to get a mixed solution; (4) pouring the mixed solution into the reaction kettle, and reacting to obtain a reaction product; and (5) centrifuging the obtained product, washing with deionized water and then freeze-drying with a freeze dryer. USE - The method is useful for preparing a mesoporous nitrogen-doped graphene-loaded molybdenum disulfide, by laser irradiation, which is useful for electrocatalytic hydrogen production (claimed). ADVANTAGE - The method is simple, safe, ingenious in design, environmentally-friendly and cost-effective. DETAILED DESCRIPTION - Preparing a mesoporous nitrogen-doped graphene-loaded molybdenum disulfide by laser irradiation involves: (1) putting graphene oxide into absolute ethanol, ultrasonically crushing and evenly dispersing into a 0.25-0.4 g/l suspension, pouring the suspension into a reaction kettle, and irradiating with nanosecond parallel pulse laser for 20-30 minutes under constant magnetic stirring to obtain graphene oxide; (2) centrifuging the laser irradiated graphene oxide obtained in step (1), washing with deionized water and dispersing the precipitate in deionized water for freeze-drying; (3) dispersing 0.5-1 g/l freeze-dried and laser irradiated graphene oxide obtained in step (2) and ammonium tetrathiomolybdate in a mass ratio of 1:1-1:8 in N,N-dimethylformamide, then adding urea, where the mass ratio of urea to graphene oxide after laser irradiation is 20:1-70:1, carrying out ultrasonic dispersion until the mixture is homogeneous, adding hydrazine hydrate, where the concentration of ammonium tetrathiomolybdate in hydrazine hydrate is 100-200 g/l and continuously carrying out ultrasonic treatment for 10-20 minutes to get a mixed solution; (4) pouring the mixed solution obtained in step (3) into the reaction kettle, and reacting at 180-200 degrees C for 12-16 hours to obtain a reaction product; and (5) centrifuging the product obtained in step (4), washing with deionized water and then freeze-drying with a freeze dryer. An INDEPENDENT CLAIM is included for use of the mesoporous nitrogen-doped graphene-loaded molybdenum disulfide for electrocatalytic hydrogen production.