SiO_2/M纳米复合材料的结构及催化性能

Structure and catalytic activity of SiO_2/M nanocomposite materials

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

SiO 2/M nanocomposite materials(M=Cu or Co)are prepared by sol gel process and supercritical drying.The microstructure of the nanocomposite,including partical size and pore size distribution is discussed.Their catalytic behavior were determined.The results indicate that SiO 2/M nanocomposite materials has high surface areas.Metal components Cu or Co are dispersed highly in the skeleton of SiO 2 aerogels.For CO-O 2 and CO-NO reactions,SiO 2/M nanocomposite materials showed high catalytic activities.