▎ 摘　　要

NOVELTY - Preparation of graphene oxide-based composite aerogel catalyst involves mixing a sodium alginate solution with a graphene oxide suspension, ultrasonically-processing to obtain a graphene oxide/sodium alginate mixed solution, slowly-injecting the graphene oxide/sodium alginate mixture into a calcium chloride solution for gelation and aging, and washing with water to obtain a sodium alginate-graphene oxide hydrogel, pretreating the hydrogel in an aqueous alcohol solution containing tetrabutylammonium chloride, placing in silver nitrate aqueous solution for soaking, washing with water and freeze-drying. USE - Preparation of graphene oxide-based composite aerogel catalyst for catalyzing and degrading organic pollutants in sewage (all claimed). ADVANTAGE - The catalyst uses the crosslinking of sodium alginate to form a three-dimensional network aerogel structure, and graphene oxide as a substrate to stably load in the three-dimensional network structure, is convenient for recycling and can be used for high-efficiency degradation of organic pollutant in sewage. The sodium alginate gel and the active component silver/silver chloride nanoparticles have a strong binding force with the graphene oxide substrate, which can effectively prevent the active component peeling from the substrate during the degradation process. The rich pore structure and wrinkled shape on the surface of composite aerogel can accelerate the transfer of electrons in the catalyst and promote the generation of active free radicals, and improve the catalytic degradation performance of aerogel.