采用溶胶 -凝胶法和超临界干燥法制备了SiO2 /M (Cu ,Co)纳米复合材料 ,对其结构、形貌进行了TEM和比表面分析 ,并研究了SiO2 /M纳米复合材料的催化性能。结果表明 ,制得的SiO2 /M纳米复合材料保留了SiO2 气凝胶的纳米网络和高比表面积 ,金属组份Cu与Co均匀地分散在纳米级SiO2 气凝胶骨架中 ,对CO的氧化反应以及CO -NO反应均表现出高的催化活性 SiO2 / M (Cu, Co) nanocomposites were prepared by sol-gel method and supercritical drying method. The structure and morphology of the composites were analyzed by TEM and specific surface area. The catalytic properties of SiO2 / M nanocomposites performance. The results show that the prepared SiO2 / M nano-composite retains the nano-network and high specific surface area of ​​the SiO2 airgel, the metal components Cu and Co are uniformly dispersed in the nano-SiO2 airgel skeleton, and the oxidation reaction of CO As well as the CO -NO reaction showed high catalytic activity