▎ 摘　　要

NOVELTY - An environmentally-friendly high-efficiency composite photocatalyst, comprises 25-32 pts. wt., preferably 28 pts. wt. activated carbon, 5-10 pts. wt., preferably 7.5 pts. wt. silica, 15-20 pts. wt., preferably 18 pts. wt. titanium dioxide, 10-14 pts. wt., preferably 12 pts. wt. graphene, 3-6 pts. wt., preferably 4.5 pts. wt. thinner and 8-12 pts. wt., preferably 10 pts. wt. absolute ethanol. USE - Environmentally-friendly high-efficiency composite photocatalyst is used for decomposing pollutants. ADVANTAGE - The photocatalyst uses simple and easy to obtain materials, can be prepared by a simple and easy method, and has excellent adsorption efficiency. DETAILED DESCRIPTION - An INDEPENDENT CLAIM is included for preparation method of the composite photocatalyst, which involves mixing graphene, acidic mixing reagent and potassium permanganate, heating at 80 degrees C and stirring for 1 hour in a water bath to obtain a black mixed liquid, adding deionized water, 30% hydrogen peroxide solution and hydrochloric acid solution to the black mixed solution, mixing and stirring to obtain a yellow-brown solution, washing yellow-brown solution with deionized water and centrifugal dispersion, vacuum-drying for 3 hours under constant temperature conditions to obtain graphene oxide, mixing and dispersing titanium dioxide and graphene oxide in ethanol by ultrasonic treatment, irradiating with UV light for 5-6 hours and performing reduction treatment to obtain graphene-titanium dioxide composite nanomaterial, pouring silica into the reaction kettle, adding sodium hydroxide solution and heating at 80-100 degrees C to obtain a sodium silicate binder, adding activated carbon to sodium silicate binder, stirring uniformly, adding absolute ethanol to mix and stirring for 15-20 minutes to obtain an activated carbon mixture, drying activated carbon mixture at a temperature above 160 degrees C for 2 hours to obtain a dry silicon-carbon mixed material, mixing and stirring uniformly graphene-titanium dioxide nanocomposite material and silicon-carbon mixed material, packaging in non-woven fabric, and storing.