▎ 摘　　要

NOVELTY - Preparing nickel-containing graphene-yttrium vanadate photocatalyst, comprises (i) mixing uniformly graphene oxide and deionized water in a mass ratio of 1:3-5, and subjecting to ultrasonic treatment to obtain graphene oxide dispersion liquid, (ii) based on molar ratio of 1:1:1, adding sodium humate and hydrazine hydrate into graphene oxide dispersion liquid, and stirring uniformly to obtain a mixed solution, (iii) transferring the mixed solution into a hydrothermal reaction kettle, reacting for 30-60 minutes, then filtering and washing to obtain graphene, (iv) dissolving the graphene and nickel nitrate in a molar ratio of 1-3:1 in ethanol, adding yttrium nitrate and ammonium metavanadate, adjusting mixed system pH to alkaline, then stirring, and (v) transferring mixture obtained in step (iv) into a hydrothermal kettle and carry out hydrothermal reaction, and centrifuging obtained product, washing, drying, mixing with magnetic powder in a mass ratio of 1:0.05-0.1, and laser welding. USE - The nickel-containing graphene-yttrium vanadate photocatalyst is useful for producing hydrogen gas (claimed). ADVANTAGE - The photocatalyst: has large surface area and more active center, high efficiency, excellent stability, long cycle life and improved photocatalytic hydrogen production effect. DETAILED DESCRIPTION - An INDEPENDENT CLAIM is also included for nickel-containing graphene-yttrium vanadate photocatalyst obtained by above mentioned method.