▎ 摘　　要

NOVELTY - Preparation of graphene-titania-clay composite material, involves preparing graphene oxide suspension, mixing concentrated hydrochloric acid, water and ammonium sulfate, stirring, dripping tetrabutyl titanate in mixed solution, stirring for 2-3 hours to obtain titanium dioxide suspension, carrying out hydrothermal reaction, injecting graphene oxide suspension, titanium dioxide suspension and attapulgite clay to hydrothermal reactor at 160-200 degrees C, reacting for 20-24 hours to obtain three-dimensional composite material. USE - Preparation of graphene-titania-clay composite material used in sewage treatment and harmful gas purification. ADVANTAGE - The method provides graphene-titania-clay composite material, which has high electrical conductivity, recyclability, specific surface area, adsorption capacity, photocatalytic effect and purification ability. The composite material can be prepared industrially on a large scale by simple method. The method is economical and easy to operate. DETAILED DESCRIPTION - Preparation of graphene-titania-clay composite material, involves (a) preparing graphene oxide suspension, (b) mixing concentrated hydrochloric acid, water and ammonium sulfate, stirring, dripping tetrabutyl titanate in mixed solution, stirring for 2-3 hours to obtain titanium dioxide suspension, (c) carrying out hydrothermal reaction, injecting graphene oxide suspension, titanium dioxide suspension and attapulgite clay to hydrothermal reactor at 160-200 degrees C, reacting for 20-24 hours to obtain three-dimensional composite material. The volume ratio of graphene oxide suspension, titanium dioxide suspension and clay are 3-5:20-25: 0.006-0.01.