Photocatalyst/SiO2 composite aerogel material and preparation method thereof

The invention relates to a photocatalyst/SiO2 composite aerogel material and a preparation method thereof, and belongs to the technical field of adsorptive/photocatalytic materials. The preparation method of the photocatalyst/SiO2 composite aerogel material comprises the following steps: gel preparation: soaking bacterial cellulose-containing SiO2 gel in a catalyst precursor sol or solution to obtain a photocatalyst/SiO2 composite gel; performing aging treatment on the obtained photocatalyst/SiO2 composite gel by an alkyl organic solvent, wherein the alkyl organic solvent is a hexamethyldisiloxane, alcohol (such as ethyl alcohol or isopropyl alcohol) or alkane (such as normal hexane or heptane) organic solvent; and carrying out surface modification and normal-pressure drying to obtain the photocatalyst/SiO2 composite aerogel material, wherein the prepared photocatalyst/SiO2 composite aerogel adopts a mesoporous structure, the pore diameter is 8-25 nm, the specific surface area is 200-800 m /g and the pore volume is 0.7-3.5 cm /g.