Direct Assembly of Beta Zeolite Seeds into Mesoporous Nanomaterials: Structural Characterization and Catalytic Application

A large-area two-dimensional mesostructure with well-ordered mesochannels, especially for supported mesoporous silica thin films (MSTFs) with vertical mesochannels, have drawn lots of attention in potential applications. However, due to dissimilarity of two interfaces, micelle-templating method usually leads to parallel aligned channels on substrates. Herein we introduce an oil agent into synthetic solution for effectively tuning interfacial interaction between the substrate and solution. As a result, the oil agent here serves as two key roles: (i) one is to tune the orientation of mesochannels perpendicular to the substrate. (ii) The other is to controll the mesochannel sizes in the range of 4-6 nm. Thus, a series of pore-size controllable silica thin films can be obtained in the size of 1