氧化铜气凝胶的制备与结构表征

以CuSO₄·5H₂O为前驱体，聚丙烯酸为分散剂，采用溶胶 凝胶法制备出铜基复合气凝胶，该气凝胶经高温热处理后得到氧化铜气凝胶。通过场发射扫描电镜（FESEM）、高分辨透射电镜（HRTEM）、X射线衍射（XRD）以及N₂吸附对气凝胶的结构进行了表征。结果表明：铜基复合气凝胶是由大量球状颗粒堆积而成的；经不同温度热处理，气凝胶逐渐由三维网络状结构转变为致密结构。XRD谱表明，该材料为无定形态，随处理温度的升高，气凝胶的晶型不断变化，并最终变为氧化铜气凝胶。N₂吸附结果表明，经不同温度处理后，气凝胶样品具有较高的比表面积。

Synthesis and Characterization of Copper-Based Aerogel

Copper-based aerogel was prepared by sol-gel method using inorganic salt as precursor. The morphology of copper-based aerogels was evaluated by field-emission scanning electron microscope (FESEM) and high-resolution transmission electron microscopy (HRTEM). The results suggest that the aerogels are made up of three-dimensional porous structure. The X-ray diffraction (XRD) patterns show that the as prepared copper-based aerogel belongs to amorphous material. The calcination of the as prepared aerogels at different temperatures induces a phase change which results in the formation of a copper oxide aerogel. The N₂ adsorption/desorption shows that the copper-based aerogel has a high surface area.