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以氯化钴为原料,聚丙烯酸(PAA)为模板剂制得了钴基复合气凝胶,通过场发射扫描电镜(FESEM)、高分辨透射电镜(HRTEM)、X射线衍射(XRD)、N2吸脱附以及红外谱图(FTIR)对气凝胶的结构进行了表征,结果表明:钴基复合气凝胶是由大量纳米级的球状颗粒堆积而成的,具有典型的三维网络结构,其骨架是由大量非晶态的碳层包覆的氧化钴胶体颗粒所组成的;气凝胶具有较高的比表面积为177 m2/g,孔径分布主要集中在4 nm左右,为介孔材料。通过退火处理后,钴基复合气凝胶中的有机物被完全氧化、分解,制备出了Co3O4气凝胶,其微观结构较为致密,具有立方的多晶结构,比表面积为54 m2/g,孔径分布主要集中在7 nm左右。
Cobalt-based composite aerogels were prepared by using cobalt chloride as raw material and polyacrylic acid (PAA) as template to prepare cobalt-based composite aerogels, which were characterized by field emission scanning electron microscopy (FESEM), high resolution transmission electron microscopy (HRTEM), X-ray diffraction Desorption and infrared spectroscopy (FTIR) were used to characterize the structure of the aerogels. The results show that the cobalt-based aerogels are composed of a large number of nano-sized spherical particles with a typical three-dimensional network structure, Is composed of a large number of amorphous carbon coated cobalt oxide colloidal particles; airgel has a high specific surface area of 177 m2 / g, the pore size distribution is mainly concentrated at about 4 nm, is a mesoporous material. After annealing, the organic compounds in the cobalt-based composite airgel were completely oxidized and decomposed to prepare a Co3O4 airgel with a relatively compact microstructure and a cubic polycrystalline structure with a specific surface area of 54 m2 / g and a pore size The distribution is mainly concentrated around 7 nm.