日本ゼオライト学会　刊行物 Publication of Japan Zeolite Association

γ-Alumina is one of the most important catalyst supports utilized in industrial fields such as industrial processes and exhaust gas purification. The synthesis of mesoporous alumina has been reported using amphipathic organic molecules, but the kind of mesoporous alumina is few and for example there is no series of mesoporous alumina with the pore size controlled on demand. We focused on a synthetic method of mesoporous powders through the evaporation-induced self-assembly process and then investigated that of mesoporous alumina powders by using the spray-drying process. We have so far succeeded in synthesizing several powder samples of mesoporous alumina with different pore sizes by changing the molecular structure of polymeric amphiphilic organic molecules. Thus, we also found that alumina frameworks can be fully crystallized not only to its γ-phase but also to α-phase to some extent while maintaining the porosity, which can be understood by considering the surface curvature of alumina frameworks that was defined by the pore diameter.