石墨烯/碳复合气凝胶的制备及其吸附性能

Preparation and adsorption properties of graphene/C composite aerogels

碳气凝胶具有高比表面积、高导电性等优异的性能,将碳气凝胶与具有同样优异性能的石墨烯相结合,通过溶胶-凝胶法制备得到石墨烯/碳(G/C)复合气凝胶,进一步提高其吸附性能。研究结果表明,G/C复合气凝胶为三维多孔结构,具有较高的比表面积643 m^(2)/g、孔容积1.688 cm^(3)/g、平均孔径13.50 nm。对水中模拟污染物土霉素、布洛芬的吸附实验结果表明,G/C复合气凝胶表现出优异的药物污染物吸附去除率,对土霉素的吸附去除率最高达到90.78%,而对布洛芬的吸附去除率也可以达到50.11%。

Carbon aerogels possess excellent properties including high specific surface area and electrical conductivity.Graphene exhibited various advantages.Graphene/C(G/C)composite aerogels were prepared by the sol-gel method by combining carbon aerogels with graphene to further improve the adsorption performance.The results showed that G/C composite aerogel possesses a three-dimensional porous structure with a high specific surface area of 643 m^(2)/g,pore volume of 1.688 cm^(3)/g and the average pore size of 13.50 nm.G/C composite aerogels showed the excellent adsorption and removal performance of drug pollutants in wastewater using oxytetracycline and ibuprofen as simulated pollutants.The highest adsorption removal efficiency of oxytetracycline can reach 90.78%,and the adsorption removal efficiency of ibuprofen also can reach 50.11%.