▎ 摘　　要

NOVELTY - Preparing sulfide-graphene composite photoelectrocatalyst involves dissolving graphene oxide in deionized water and performing ultrasonic dispersion to obtain graphene oxide dispersion. The soluble metal salt is dissolved in the prepared graphene oxide dispersion, then stirring uniformly to obtain mixture of graphene oxide-soluble metal salt, then taking the lower layer of precipitate, then washing for once, drying and grinding to obtain metal ion doped graphene oxide powder. The obatined metal ion doped graphene oxide powder is ultrasonically dispersing in deionized water, then added with sulfide precursor salt solution, stirred uniformly then mixed with thiourea to obtain reactant mixed solution. The obtained reactant mixed solution is transferred to a polytetrafluoroethylene kettle for sealing, and subjected to hydrothermal reaction at a temperature of 100-250 degrees C for 16 hours to obtain black precipitated product. USE - Method for preparing sulfide-graphene composite photoelectrocatalyst. ADVANTAGE - The method enables to prepare sulfide-graphene composite photoelectrocatalyst, which promotes uniformly dispersion of sulfide layer, inhibits stacked, and large specific surface area of graphene sheet, which provides more active sites and then effectively improves catalytic performance of composite material. DETAILED DESCRIPTION - The black precipitate is washed with water and ethanol for once and dried to obtain black solid powder, which is the desired product.