▎ 摘　　要

NOVELTY - Preparing molybdenum-based single-atom high-entropy perovskite oxide desulfurization catalyst involves dispersing graphene oxide in ethylene glycol to obtain first solution, dissolving nitrate mixture of lanthanum, copper, cobalt, iron, manganese and nickel into the ethylene glycol solution to obtain the second solution, dropping the obtained first solution to obtained second solution, preparing high-entropy perovskite oxide carrier (HEPO) by stirring, refluxing, centrifuging, drying, high-temperature calcining, introducing the obtained HEPO into an aqueous solution containing molybdenum (Mo) ion, stirring fully, adsorbing, centrifuging, drying, performing secondary calcining under hydrothermal condition, performing ammonium chloride solution exchange, and calcining to obtain Mo-based single-atom high-entropy perovskite oxide desulfurization catalyst Mo/HEPO. USE - Method for preparing molybdenum-based single-atom high-entropy perovskite oxide desulfurization catalyst used for removing sulfur-containing compound of dibenzothiophene and its derivative in fuel oil (claimed). ADVANTAGE - The method has simple operation process and mild reaction condition, uses graphene oxide as template to prepare Mo-based high-entropy perovskite oxide single-atom catalyst with rich mesoporous structure, uses air as oxidant, realize ultra-deep oxidative desulfurization of oil product under the condition of low energy consumption, and realize the 'turning waste into treasure' of dibenzothiophene. DETAILED DESCRIPTION - An INDEPENDENT CLAIM is included for a Mo-based single-atom high-entropy perovskite oxide desulfurization catalyst, which is: a two-dimensional nano-sheet with abundant pore structure and defect sites, where the Mo single atom loading amount is 0.30 wt.%.