泡沫结构多级孔ZSM-5分子筛的制备与表征

以商用聚氨酯泡沫为硬模板，采用原位水热法，在100℃下晶化48 h，在聚氨酯泡沫骨架表面形成厚度为1 μ m且致密、连续的分子筛膜，经高温焙烧去除聚氨酯泡沫硬模板和合成分子筛所用的有机模板剂后，获得了可自支撑的泡沫结构多级孔ZSM-5分子筛。XRD、SEM和N₂吸附-脱附表征证实，该多级孔分子筛完全复制了聚氨酯泡沫的三维网络骨架结构，因而具有大孔-介孔-微孔复合孔道结构。采用微波法，在相同实验条件下仅需反应8 h，即可获得泡沫结构的ZSM-5分子筛。该泡沫结构多级孔分子筛在吸附、分离以及催化领域具有潜在的应用价值。

Preparation and Characterization of Hierarchical ZSM-5 Foam

Commercial polyurethane foam was used as hard template for the synthesis of hierarchical ZSM-5 foam in the in-situ hydrothermal method at 100℃ for 48 h. Self supported ZSM-5 monolithic foam with average thickness around 1 μm was finally obtained after removing polyurethane foam and structural direct agent by calcination process. In accordance with XRD，SEM and N₂ adsorption-desorption results, the self-supported ZSM-5 foam perfectly replicated the three-dimensional network of the polyurethane foam and formed a hierarchical pore system. The self-supported ZSM-5 foam could be prepared at 100℃ for 8 h by using microwave method. The self-supported ZSM-5 monolithic foam could be used in the field of adsorption, separation and catalysis.