关键词:  超增溶, 自组装, 纳米, N i - A l 2O3, 体相, 表面活性剂, 分散性

Abstract: Using the SuperSolubilization Nanometer SelfAssembly method, bulk  N i - A l 2O3 catalyst is prepared with nickelnitratehexahydrate as the precursor and urea as precipitation agent, the mixture of the surfactantgather isobutylene maleic acid triethanolamine esters and petroleum hydrocarbon150SN as template agent. The  N i - A l 2O3  catalysts were characterized by TEM and TPR, and reaction mechanism of precipitation was studied. The results indicate that nanosized  N i - A l 2O3  bulk catalyst has a crystalline form with not only spherical shape，but also nanorod and nanometer silk, etc. Particles prepared by this method have good dispersion and uniform size, and narrow diameter distribution is observed between 10～50 nm. The N i - A l 2O3  reduced by hydrogen also has a crystalline form, and nanostructure of reduced  N i - A l 2O3  is more orderly than before. Particles size after reduction is still in the nanoparticles scope. TPR results show that there are two reduction peak appeared in the structure of nanometer bulk  N i - A l 2O3  catalyst,and the lowtemperature peak is NiO，high temperature reduction peak attributes to spinel structure which produced by the interaction of nickel and aluminum oxide.

Key words: Supersolubilization, Selfassembly, Nanometer, NiAl2O3, Bulk, Surfactant, Dispersion