▎ 摘　　要

NOVELTY - A graphene oxide-titania-activated carbon three-dimensional composite material is obtained by uniformly and densely attaching graphene oxide-titania composite material on the surface of an activated carbon filter or a carbon fiber web. USE - Graphene oxide-titania-activated carbon three-dimensional composite material for use as photocatalytic material and for preparing air purification device (all claimed). ADVANTAGE - The graphene oxide-titania-activated carbon three-dimensional composite material gas has excellent adsorption performance and photocatalytic degradation performance on formaldehyde, and removes 1.0 mg/m3 formaldehyde at removal rate of up to 82.5-95.6% within 10 hours. DETAILED DESCRIPTION - An INDEPENDENT CLAIM is included for preparation of graphene oxide-titania-activated carbon three-dimensional composite material, which involves (1) ultrasonically dispersing graphene oxide in mixed solvent of deionized water and alcohol to obtain graphene oxide dispersion, adding mixed crystal type nano-titanium dioxide to graphene oxide dispersion, ultrasonically dispersing for every 1-2 hours, obtaining dispersed mixture, placing the resulting mixture in a hydrothermal reactor, carrying out hydrothermal reaction to obtain graphene oxide-titanium dioxide composite suspension, (2) immersing activated carbon filter or carbon fiber mesh in obtained graphene oxide-titanium dioxide composite suspension, ultrasonically processing, removing, drying to obtain final product.