▎ 摘　　要

NOVELTY - Preparing molybdenum disulfide/graphene two-dimensional material hetero junction visible light catalyst, comprises e.g. (i) taking silicon dioxide/silicon as the substrate and slice, sequentially placing in acetone and isopropanol solution for ultrasonic cleaning, and blow drying, (ii) cleaning the substrate copper foil with acetone and placing in the tube furnace, adding mixture of argon and hydrogen, heating, stop introducing the protective gas, changing methane, reacting, taking out the copper foil by cooling to obtain single-layer uniform graphene, (iii) taking polymethyl methacrylate for spin coating on the surface of single layer of uniform graphene to obtain thick protective layer, heating and curing, and cleaning the surface of the sample with isopropanol, (iv) electroplating molybdenum foil, and (v) placing the electroplated molybdenum foil on the surface of the silicon dioxide/graphene substrate, and placing in the high temperature zone of the tube furnace. USE - The method is useful for preparing molybdenum disulfide/graphene two-dimensional material hetero junction visible light catalyst. ADVANTAGE - The method: utilizes graphene, which has excellent electrical conductivity and can accelerate the transmission of electrons on the surface of molybdenum disulfide. Hetero junction can improve the separation efficiency of electrons and holes at the interface, which will improve the photoelectric catalytic efficiency of composite materials. DETAILED DESCRIPTION - Preparing molybdenum disulfide/graphene two-dimensional material hetero junction visible light catalyst, comprises (i) taking silicon dioxide/silicon as the substrate and slice, sequentially placing in acetone and isopropanol solution for ultrasonic cleaning for 10-30 minutes, and then blow drying with high-purity argon, (ii) cleaning the substrate copper foil with acetone and placing in the tube furnace, adding mixture of argon and hydrogen at 1:3-1:10, heating at 1000-1350 degrees C, maintaining constant temperature for 20-40 minutes, then stop introducing the protective gas, changing to 20-50 sccm of methane, reacting for 30-60 minutes, finishing the reaction, taking out the copper foil by cooling to obtain single-layer uniform graphene, (iii) taking polymethyl methacrylate (PMMA) for spin coating on the surface of single layer of uniform graphene to obtain thick protective layer, then heating and curing the PMMA on the uniform graphene surface of single layer, then bombarding the back of the copper foil by oxygen ion to remove the redundant graphene and permeating the redundant PMMA due to spin coating process, then floating the copper foil on the liquid surface of the etching solution to etch the copper substrate, separating the graphene from the copper substrate, removing the etched graphene from the solution using glass slide, placing in deionized water for repeated cleaning 2-3 times, then picking up the graphene using the silica substrate, drying vertically, slowly losing the moisture between the graphene and the substrate using gravity, heating the substrate after controlling the moisture to dry, removing the residual moisture between the substrate and graphene, strengthening the bond between the graphene and the substrate, removing the PMMA on the graphene surface using good organic solvent e.g. acetone or dichloromethane, and cleaning the surface of the sample with isopropanol to obtain silicon dioxide/graphene substrate, (iv) cutting the molybdenum foil into slices, sequentially ultrasonic cleaning in acetone and isopropanol, placing in the prepared electrolyte, adopting electrochemical workstation and constant potential mode, taking molybdenum foil as working electrode, mercury oxide as reference electrode, platinum sheet as counter electrode, and electroplating molybdenum foil, and (v) placing the electroplated molybdenum foil on the surface of the silicon dioxide/graphene substrate, then placing in the high temperature zone of the tube furnace, adding 20-150 sccm argon gas, setting the temperature at 750-850 degrees C, placing the sulfur powder in the low temperature zone, setting the temperature at 150-250 degrees C, and maintaining the reaction temperature for 5-20 minutes to form large-area single-layer molybdenum disulfide on the surface of single-layer graphene to obtain final product. An INDEPENDENT CLAIM is also included for molybdenum disulfide/graphene two-dimensional material hetero junction visible light catalyst, obtained by above mentioned method.