Abstract: In the way of supersolubilization selfassembled, bulk catalyst N i - A l ₂O₃  is prepared with the carrier A l ₂O₃  and nickel. N i - A l ₂O₃  catalyst was characterized by SEM and TGDTG, and nano selfassemlbe mechanisms were also discussed. The SEM results show that supersolubilization selfassembled method can construct bulk catalyst N i - A l ₂O₃  which has a uniform particle, narrow distribution particle diameter, large specific surface area and pore volume. And after reduction, primary particle and secondary particle are also nanoparticle, porous channel between particles is 50~200 nm which is formed in the process of primary and secondary nanoscale selfassembly.TGDTG results with air and nitrogen atmosphere show that the temperture in the nitrogen atmosphere lags behind that in the air atmosphere. This is because that hydrocarbons templates burn in advance and loss weight in the presence of oxygen. Actual value of weight loss rate is much higher than theoretical value on account of that templates was not made full used.

Key words: Supersolubilization,    ,  Selfassembly,    ,  Nanometer,    ,  Characterization,   ,  Mechanism

摘要： 采用超增溶纳米自组装方法, 以廉价耐高温材料 A l ₂O₃  为载体和价格低、 活性高的Ⅷ族过渡镍制备 N i - A l ₂O₃  体相催化剂。通过S EM 和TG - DTG对制备的体相催化剂 N i - A l ₂O₃ 进行了表征, 并对纳米自组装机理进行了分析。S EM 表征结果显示, 超增溶自组装可以架构出粒子均匀、 粒径分布窄、 比表面积和孔容大的体相催化剂, 且还原后的一次颗粒和二次粒子还是纳米粒子, 粒子间的孔道在5 0~2 0 0n m 内, 这主要是在一次和二次超增溶自组装过程中形成的。空气和氮气两种不同热重气氛的TG - DTG数据显示, 氮气气氛中的温度比空气气氛要滞后, 这是因为在空气中含有氧气使样品中的烃类模板剂提前燃烧失重所致; 失重率的实际值远远高于理论值, 可能是模板剂没有被充分利用所造成。

关键词: 超增溶,    ,  自组装,    ,  , 纳米,    ,  , 表征,    ,  机理