▎ 摘　　要

NOVELTY - Preparing graphene composite aerogel sorbent comprises (1) calcining the mixed powder, washing and drying to obtain pre-powder, the ratio of pretreated powder with water is 1:10-1:15, ultrasonically dispersing to obtain pre-powder dispersion liquid, adding the powder pre-dispersion mixed with poly allyl amine hydrochloride according to the mass ratio of 8:1 to 10:1, and adding the pre-treated powder dispersion 0.2-0.5 times the mass of iron ion mixed solution, stirring and mixing to obtain the modified powder dispersion liquid, (2) adding oxidized graphene dispersion with modified dispersion powder mixed according to the mass ratio of 3:1-4:1, and adding oxidized graphene dispersion liquid 0.1-0.2 times of the mass of urea, stirring and reacting, filtering to obtain pre-graphene composite aerogel sorbent, (3) the ratio of pre-graphene composite aerogel sorbent with modified glucose mixed solution mixed according to mass ratio of 1:5-1:8. USE - The method is useful for preparing graphene composite aerogel sorbent. ADVANTAGE - The aerogel sorbent has good adsorption property and compressive property. DETAILED DESCRIPTION - Preparing graphene composite aerogel sorbent comprises (1) calcining the mixed powder, washing and drying to obtain pre-powder, the ratio of pretreated powder with water is 1:10-1:15, ultrasonically dispersing to obtain pre-powder dispersion liquid, adding the powder pre-dispersion mixed with poly allyl amine hydrochloride according to the mass ratio of 8:1 to 10:1, and adding the pre-treated powder dispersion 0.2-0.5 times the mass of iron ion mixed solution, stirring and mixing to obtain the modified powder dispersion liquid, (2) adding oxidized graphene dispersion with modified dispersion powder mixed according to the mass ratio of 3:1-4:1, and adding oxidized graphene dispersion liquid 0.1-0.2 times of the mass of urea, stirring and reacting, filtering to obtain pre-graphene composite aerogel sorbent, (3) the ratio of pre-graphene composite aerogel sorbent with modified glucose mixed solution mixed according to mass ratio of 1:5-1:8, and adding the pretreated graphene composite aerogel adsorbent 0.1-0.2 times the mass of amino silicon dioxide and pre-graphene composite aerogel adsorbent is 0.1-0.2 times the mass of sodium borohydride, stirring and reacting, filtering, drying, sintering at high temperature to obtain graphene composite aerogel sorbent blank, (4) the ratio of graphene composite aerogel sorbent material mixed with water is 1:10 to 1:12, and adjusting the pH value to 10.0-11.2, soaking, filtering and drying to obtain the graphene composite aerogel sorbent.