二维MFI分子筛的合成方法及优化合成条件的研究进展

Research Progress on Synthesis Methods and Optimization of Synthesis Conditions of Two-Dimensional MFI Molecular Sieves

与三维块状MFI沸石相比,二维MFI沸石具有更大的表面积、更短的扩散距离和更灵活的结构,不同取向的MFI沸石分子筛膜具有不同的分离效果,在催化方面具有更大的优势。在二维MFI沸石的合成中,具有亲水和疏水基团的双功能模板起着重要作用。不同基团和不同链长的模板剂对合成的二维沸石的形貌和催化性能有重要影响。本文基于近年来二维MFI沸石的研究现状,介绍了层状MFI沸石的合成方法以及如何降低合成模板剂的成本和优化纳米片合成时间进行了讨论,并展望了未来的发展机遇和挑战。

Compared with three-dimensional bulk MFI zeolite, two-dimensional MFI zeo-lite has larger surface area, shorter diffusion distance and more flexible structure. Different orientations of MFI zeolite molecular sieve membranes have different separation effects and have greater advantages in catalysis. In the synthesis of two-dimensional MFI zeolite, bifunctional templates with hydrophilic and hydrophobic groups play an important role. Template agents with different groups and different chain lengths have important effects on the morphology and catalytic performance of the synthesized two-dimensional zeolite. Based on the research status of two-dimensional MFI zeo-lite in recent years, this paper introduces the synthesis method of layered MFI zeolite, discusses how to reduce the cost of template synthesis and optimize the synthesis time of nanosheets, and looks forward to the future development opportunities and challenges.