石墨烯气凝胶的水热法制备及表征

摘要

以石墨为原料,高锰酸钾为氧化剂,通过超声制备具有不同片径的氧化石墨烯,采用一步水热还原制备石墨烯水凝胶,将石墨烯水凝胶进行冷冻干燥制备石墨烯气凝胶.分别采用 X-射线衍射、拉曼光谱、扫描电镜、透射电镜对石墨烯气凝胶的结构、形貌进行了表征.结果表明,通过水热法还原氧化石墨烯可得到具有丰富多孔结构的石墨烯气凝胶.%The graphite oxide was prepared from graphite by using potassium permanganate as oxidizing agent.Graphene hydrogels was subsequently prepared by one-step hydrothermal synthesis with ultrasonic graphite oxide.Graphene aerogels were obtained from the resultant graphene hydrogel by freeze drying technique.The structure and morphology of the graphene aerogels were characterized by X-ray diffraction,Raman spectroscopy,scanning electron microscope and transmission electron microscope.The results show that the porous graphene aerogels can be obtained by hydrothermal reduction of graphene oxide.