▎ 摘　　要

NOVELTY - Graphene composite photocatalysis aerogel with multi-stage pore structure comprises graphene aerogel, nano titanium dioxide and activated carbon fiber. The nano titanium dioxide and activated carbon fiber are uniformly dispersed in the macroporous structure of the graphene aerogel. The multi-stage pore structure has layered three-dimensional structure with macro-, meso- and micro- pores multi-stage pore structure. USE - Used as graphene composite photocatalysis aerogel with multi-stage pore structure. ADVANTAGE - The method: combes the absorption effect of graphene aerogel and photocatalytic action of titanium dioxide, thus quickly degrading and absorbing contaminants on the graphene aerogel internal voids and surface by using nano phoyocatalytic action of nano titanium dioxide; ensures in-situ regeneration of graphene aerogel; prolongs graphene aerogel adsorbent saturation time and improves cleaning effect; can conveniently change the type and adding quantity of activated carbon fiber into the multi-stage pore structure of graphene composite aerogel; improves the broad application of different pollutants; is simple; carries out in situ chemical reduction without stirring in the self-assembly process; and has mild reaction conditions. DETAILED DESCRIPTION - An INDEPENDENT CLAIM is also included for preparation of the composite graphene photocatalytic aerogel comprising (a) adding graphene oxide into deionized water, ultrasonically dispersing for 1-4 hours until they are mixed uniformly to obtain 0.5-20 mg/ml graphene oxide dispersion liquid (b) adding activated carbon fiber into graphene oxide dispersion liquid in a mass ratio of (0.01-1):1, uniformly mixing to obtain mixed solution of graphene oxide and activated carbon fiber mixed solution and ultrasonic dispersing or mechanically stirring (c) adding nano titanium dioxide and the oxidized graphene into the mixed solution of graphene oxide and activated carbon fiber in a mass ratio of (1-10):1, ultrasonically dispersing or mechanically stirring until mixed uniformly to obtain mixed solution of graphene oxide, nano titanium dioxide and activated carbon fiber mixed solution (d) adding a reducing agent to the mixed solution, ultrasonically dispersing or mechanically stirring until uniformly mixed, placing in 80-120 degrees C water bath for 1-5 hours for in-situ self-assembling to obtain reduced graphene, nano titanium dioxide and composite photocatalytic activated carbon fiber three-dimensional hydrogel and (e) freeze-drying or supercritical drying the hydrogel to obtain aerogel product.