▎ 摘　　要

NOVELTY - Preparation method of magnetic heteropoly acid-graphene composite catalyst involves (a) mixing ferrous sulfate, sodium hydroxide, polyvinylpyrrolidone, urea and aqueous graphene solution, subjecting the mixture to hydrothermal reaction, filtering, washing and drying to obtain a magnetic carrier material, (b) mixing sodium tungstate, antimony trioxide and hydrochloric acid with water, carrying out condensation heating reaction, filtering, carrying out crystallization, washing drying to obtain sodium antimony tungstate, and (c) mixing sodium antimony tungstate, zinc acetate and water. USE - Method is useful for magnetic heteropoly acid-graphene composite catalyst (claimed). ADVANTAGE - The magnetic heteropoly acid-graphene composite catalyst has uniform morphology and large specific surface area. DETAILED DESCRIPTION - Preparation method of magnetic heteropoly acid-graphene composite catalyst involves (a) dissolving graphene oxide in water under ultrasonic condition to obtain aqueous graphene solution, mixing ferrous sulfate, sodium hydroxide, polyvinylpyrrolidone, urea and aqueous graphene solution, subjecting the mixture to hydrothermal reaction, filtering to obtain a solid phase, washing the solid phase and drying to obtain a magnetic carrier material, (b) mixing sodium tungstate, antimony trioxide and hydrochloric acid with water, carrying out condensation heating reaction under reflux condition, filtering to obtain a filtrate, carrying out crystallization, taking out solid phase, washing the solid phase and drying to obtain sodium antimony tungstate, (c) mixing sodium antimony tungstate, zinc acetate and water, carrying out condensation heating reaction under reflux condition, cooling to room temperature, filtering to obtain a liquid phase, mixing the liquid phase with an aqueous ammonium chloride solution, carrying out crystallization, taking out a solid phase, washing the solid phase and drying to obtain the heteropoly acid material, and (d) dissolving the magnetic carrier material in water under ultrasonic condition, adding cetyltrimethylammonium bromide and heteropoly acid material, stirring, carrying out hydrothermal reaction, filtering the product, washing the solid phase and freeze-drying to obtain magnetic heteropoly acid-graphene composite catalyst.