▎ 摘　　要

NOVELTY - Three-dimensional integrated photo-thermal conversion material is prepared by preparing foamed nickel graphene material by chemical vapor deposition (CVD) method on the pretreated foamed nickel substrate, and preparing the nickel-graphene- molybdenum oxide (Ni-G-MoO3-x) by hydrothermal method. The gas required for CVD is argon, 99.99% high-purity hydrogen and 99.99% high-purity methane. The performance parameters of the material are thickness of 0.5 mm, evaporation rate under one light intensity at 1.50 kg/m2 hour, efficiency of 95.8%, cycle stability of more than 36 hours, and hydrophilic and hydrophobic is superhydrophilic. USE - As three-dimensional integrated photo-thermal conversion material. ADVANTAGE - The photo-thermal conversion material combines graphene, molybdenum oxide and porous foamed nickel through CVD and oxidation processes to ensure that the material has a strong interface bonding force. After one step of water heating, the photo-thermal conversion material has super hydrophilicity, which can ensure the porous water absorption capacity of the material. Simultaneously after covering graphene on the surface of nickel foam, the photo-thermal conversion material protects the application of the overall material in the marine environment and increases the prolonged service life of the material. DETAILED DESCRIPTION - An INDEPENDENT CLAIM is included for a preparation method of the three-dimensional integrated photo-thermal conversion material, involving (a) pre-treatment of nickel foam by treating nickel foam with 3 mol/l dilute hydrochloric acid, acetone, absolute ethanol, and deionized water under ultrasonic treatment for 5 minutes, (b) CVD growth of graphene by firstly putting the foamed nickel into a tube furnace and heating it to 1035 degrees C at 10 degrees C/minute under a 300 sccm argon atmosphere, keeping the temperature of the nickel foam, annealing at 1035 degrees C and a mixed atmosphere of 50 sccm argon and 50 sccm hydrogen for 15 minutes, remaining the gas atmosphere in the tube furnace unchanged, and dropping the temperature to 1000 degrees C, after reaching the growth temperature of 1000 degrees C, introducing methane as a carbon source, changing the mixed gas in the tube furnace to 20 sccm hydrogen, 50 sccm argon and 100 sccm methane, maintaining the growth for 20 minutes, after completing growth, stopping the introduction of hydrogen and methane, slowly cooling to room temperature under 200 sccm argon atmosphere to obtain nickel-graphene (Ni-G) product, and (c) hydrothermal growth of molybdenum oxide by mixing 1 mmol molybdenum powder and 1.5 ml of hydrogen peroxide solution with a mass concentration of 30%, adding 28.5 ml of absolute ethanol, magnetically stirring the uniform mixed solution for 30 minutes, putting the prepared Ni-G sample and the mixed solution into a 50 ml reactor, keeping it in an oven at 160 degrees C for 8-12 hours, cooling to room temperature, taking out the obtained Ni-G-MoO3-x ( where x is 0-3), drying at room temperature for 24 hours, and after completing the hydrothermal treatment, testing the desalination performance and contact angle of the sample.