▎ 摘　　要

NOVELTY - Preparing Z-type heterojunction aerogel photocatalytic material, comprises (i) using titania and grafted-carbon nitride as the main body of the photocatalytic material, and graphene oxide (GO) as high-speed channel of photo-generated electrons to construct the Z-type heterojunction; (ii) preparing GO brown-black powder by the modified Hummers method, and grafted-carbon nitride light yellow powder with a light and fluffy structure by the urea thermal polymerization method; (iii) mixing GO and g-C3N4 powder, adding deionized water, ultrasonically peeing to obtain uniform dispersion solution A; (iii) dissolving butyl titanate and 0.5 ml acetic acid in 5 ml ethanol, and controlling the amount of butyl titanate based on the mass-volume ratio of GO and butyl titanate to obtain solution B; (iv) adding solution B into solution A dropwise, continuing to stir to obtain a uniform mixed solution, pouring it into a mold and aging to obtain a hydrogel; and (v) precooling at -80 degrees C and freeze-drying. USE - The Z-type heterojunction aerogel photocatalytic material is useful in treatment of unsymmetrical dimethylhydrazine wastewater (claimed). ADVANTAGE - The method combines g-C3N4 with titania to improve the utilization of visible light, thus improving photocatalytic activity, has good adsorption performance, rich catalytic active sites, high photocatalytic efficiency, stable performance, easy recycling and environmental friendliness. DETAILED DESCRIPTION - Preparing Z-type heterojunction aerogel photocatalytic material, comprises (i) using titania and grafted-carbon nitride as the main body of the photocatalytic material, and GO as the high-speed channel of photo-generated electrons to construct the Z-type heterojunction; (ii) preparing GO brown-black powder by the modified Hummers method, and grafted-carbon nitride light yellow powder with a light and fluffy structure by the urea thermal polymerization method; (iii) according to the mass ratio of GO and grafted-carbon nitride of 1:4-9:1, mixing GO and g-C3N4 powder, adding deionized water, where the ratio of powder to water is 1-3 mg/ml, ultrasonically peeing to obtain uniform dispersion solution A; (iii) dissolving butyl titanate and 0.5 ml acetic acid in 5 ml ethanol, and controlling the amount of butyl titanate based on the mass-volume ratio of GO and butyl titanate to obtain solution B, where the ratio is 10-80 mg/ml; (iv) adding solution B into solution A dropwise, continuing to stir for 1-5 hours to obtain a uniform mixed solution, pouring it into a mold and aging for 12-36 hours to obtain a hydrogel; and (v) precooling at -80 degrees C and freeze-drying for 48 hours.