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利用三聚氰胺高温下缩聚产生的g-C3N4作为二维模板,同时利用其与对苯二甲醛发生席夫碱反应产生聚合物以及聚合物的碳化,制备了具有二维形貌的类石墨烯片层碳材料(GLCS),随后,将GLCS用KOH进行活化,得到了具有多孔结构的a-GLCS.对材料进行透射电镜(TEM)、扫描电镜(SEM)、X射线光电子能谱测试(XPS)、拉曼光谱(Raman)和比表面积分析(BET),并将材料用作超级电容器电极材料进行电化学测试.结果表明该方法能够制备得到二维片层碳材料,并且材料中掺杂有一定量的氮元素.GLCS经过KOH活化后,比表面积和电容性能都有了大幅提高,电流密度为1 A/g时GLCS和a-GLCS比容量分别为160和300 F/g.
Using g-C3N4 produced by polycondensation of melamine at high temperature as a two-dimensional template, a graphene sheet with a two-dimensional topography was prepared by using a Schiff base reaction with terephthalic acid to produce a polymer and carbonization of the polymer (GLCS), and then GLCS was activated by KOH to get a-GLCS with porous structure.The materials were characterized by transmission electron microscopy (TEM), scanning electron microscopy (SEM), X-ray photoelectron spectroscopy (XPS) Raman and BET, and the material was used as the electrode material of the supercapacitor for electrochemical test.The results show that the method can prepare a two-dimensional lamellar carbon material, and the material is doped with a certain amount of Nitrogen.The specific surface area and capacitance of GLCS have been greatly improved after KOH activation, and the specific capacities of GLCS and a-GLCS are 160 and 300 F / g respectively at a current density of 1 A / g.