▎ 摘　　要

NOVELTY - Preparing zinc oxide-titanium dioxide-loaded magnetic graphene oxide/chitosan composite material, by (a) adding chitosan powder to glacial acetic acid to form a chitosan solution, and adding graphene oxide to water, dispersing, adding a graphene oxide dispersion to the chitosan solution, and curing to obtain chitosan/graphene oxide suspension, (b) dissolving ferric ammonium sulfate and ammonium ferrous sulfate in water, adding aqueous ammonia, adding the suspension, washing with water and ethanol, and grinding, (c) adding zinc acetate to ethanol solution, adding triethanolamine, stirring to obtain zinc oxide sol, adding tetrabutyl titanate to ethanol, adding acetic acid, stirring, adding hydrochloric acid to obtain titanium dioxide sol, dripping the zinc oxide sol to titanium dioxide sol, reacting to obtain the zinc oxide-titanium dioxide sol, and calcining to obtain zinc oxide-titanium dioxide powder, and (d) adding the product of step (b) and step (c) to ethanol, and dispersing. USE - The method is useful for preparing zinc oxide-titanium dioxide-loaded magnetic graphene oxide/chitosan composite material used in sewage treatment (claimed). ADVANTAGE - The prepared composite material has excellent adsorption performance, and effectively removes heavy metals and organic pollutants in the sewage. DETAILED DESCRIPTION - Method for preparing zinc oxide-titanium dioxide-loaded magnetic graphene oxide/chitosan composite material, involves (a) adding chitosan powder to glacial acetic acid to form a chitosan solution, adding graphene oxide to ultrapure water, ultrasonically dispersing to form a graphene oxide dispersion, while stirring, slowly adding the graphene oxide dispersion to the chitosan solution, continuously stirring for 1-2 hours, and curing for 10-12 hours to obtain chitosan/graphene oxide suspension, (b) dissolving ferric ammonium sulfate dodecahydrate and hexahydrate ammonium ferrous sulfate in ultrapure water under the protection of nitrogen, quickly adding aqueous ammonia, slowly adding the chitosan/graphene oxide suspension, stirring at 85 degrees C under a rotation speed of 300 rpm, cooling to room temperature, washing several times with ultrapure water and absolute ethanol, vacuum drying, grinding, and placing in a desiccator, (c) adding weighed zinc acetate to ethanol solution, magnetically stirring, adding triethanolamine, stirring for 30 minutes to obtain zinc oxide sol, adding tetrabutyl titanate to ethanol, stirring for 1-2 hours, adding acetic acid, stirring the mixed solution for 1-2 hours, adding hydrochloric acid to obtain titanium dioxide sol, dripping the zinc oxide sol to titanium dioxide sol, reacting for 1-2 hours to obtain the zinc oxide-titanium dioxide sol, drying, and calcining the zinc oxide-titanium dioxide dry gel to obtain zinc oxide-titanium dioxide powder, and (d) adding the product of step (b) and product of step (c) to ethanol, ultrasonically dispersing for 1-2 hours, mixing, hydrothermally reacting, and drying to obtain the composite material.