(163bb) Synthesis of Periodic Mesoporous Materials from Various Zeolites

Microporous and mesoporous materials abstracted great amount of interests due to their inherent pore structure and surface properties. Zeolite and Periodic mesoporous silica are the representative examples of the microporous and mesoporous materials respectively. Both of the materials have many advantageous properties but also limitations. For example, zeolite is well known for its regular microporosity and acid sites in the crystalline framework, but the micro sized pores lead limitations sometimes in the diffusional point of view. Mesoporous silica material has quite accessible meso scale pores but the lack of strong functionality and hydrothermal stability can be a problem that should be solved. In the present work, very novel synthetic strategy involving bottom up and top down approach is suggested. Various zeolites are used as a starting material for the preparation of zeolite nano building unit solution. Various zeolites such as beta, mordenite, Y, USY and ZSM-5 are dissolved under basic condition and used for the synthesis of mesostructured materials such as MCM-41or SBA-15. Various instruments such as IR, TPD, SEM and TEM are used for the characterization.