【摘要】 采用溶胶凝胶法，制备了氧化铝负载的铜基超细粒子催化剂；用ＴＧ－ＤＴＡ、ＸＲＤ、ＢＥＴ以及ＴＥＭ等技术手段，对催化剂的物相结构、表面孔结构、粒子形貌以及催化性能等进行了研究．结果表明，利用溶胶凝胶法，可以直接制备出高比表面积、低堆积密度的纤维状纳米级负载型Ｃｕ／Ａｌ２Ｏ３超细粒子；活性组分以远低于纳米级的微晶粒子簇状态，均匀地分散在纳米级氧化铝载体表面上，而且在低于５００℃的温度范围内，具有较高的稳定性，晶粒未聚集长大，在十二醇胺化反应中表现出较高的催化活性．更多还原

【Abstract】 Crystalline phase, surface, pore structure and crystallography of alumina supported copper ultrafine particle catalysts prepared by modified sol gel method were studied by TG DTA, BET, XRD and TEM techniques respectively. The results show that this catalyst has high surface area and very low density, the particles are in the shape of fiber, and the size of active component is much smaller than nanoscale, and is highly dispersed on the nanoscaled alumina supports as a state of copper oxide microcrystalline. Below 500℃, the ultrafine catalyst is very stable which posseses the possibility to be used in the reaction at high temperature.更多还原