▎ 摘　　要

NOVELTY - Preparing gold-magnetite/graphene/titanium dioxide photocatalyst comprises adding ferrous sulfate and ferric sulfate in deionized water, stirring and dissolving the mixture by nitrogen as protective gas, adding aqueous ammonia to obtain black precipitate, continuously stirring and ultrasonically vibrating the precipitate to obtain magnetite nano suspension, adding proper amount of chloroform solution in the suspension, mixing hydrogen tetrachloroaurate(III) hydrate, oleylamine and tertiary butyl amine borane, stirring the mixture to obtain gold-modified magnetite nanoparticles. USE - The method is useful for preparing gold-magnetite/graphene/titanium dioxide photocatalyst (claimed). DETAILED DESCRIPTION - Preparing gold-magnetite/titanium dioxide photocatalyst comprises adding ferrous sulfate and ferric sulfate in deionized water, stirring and dissolving the mixture by nitrogen as protective gas at 40-60 degrees C, adding aqueous ammonia to obtain black precipitate, continuously stirring and ultrasonically vibrating the precipitate to obtain magnetite nano suspension, adding proper amount of chloroform solution in the suspension, mixing hydrogen tetrachloroaurate(III) hydrate, oleylamine and tertiary butyl amine borane, stirring the mixture for 20 minutes to obtain gold-modified magnetite nanoparticles, preparing graphene/titanium mixed solution by sol-gel method, and adding hydrothermal gold-modified magnetite nanoparticles in the graphene/titanium mixed solution and then stirring.