Emerging molecular sieve regulation strategy for the adsorption and catalysis: Silicon hydroxyl engineering

As a widely used aluminosilicate material, molecular sieves are modified to enhance performance according to the requirements of different practical working conditions. One of the main functional groups, the silicon hydroxyl group, is crucial to the unique chemical characteristics and adsorption capacity of molecular sieves, because of silicon hydroxyl group has inherent hydrogen bonding, which can give molecular sieves more adsorption and catalytic sites. Moreover, silicon hydroxyl groups are crucial for regulating the performance of molecular sieves and operate as a channel for the insertion of extra active compounds. Various regulating tactics include grafting ionic liquids and organic molecules, are utilized to create silicon hydroxyl nests to either directly or indirectly anchor active metals, and forming silicon hydroxyl groups to engage in adsorption and catalysis. The classification methods and characterization techniques of silicon hydroxyl groups have been summarized, and the introduction methods and applications in regulating the performance of molecular sieves have been reviewed. The key factors that need attention in regulating silicon hydroxyl groups have been analyzed. Finally, the development trend for the performance and application of silicon hydroxyl groups controlled molecular sieves in the future was discussed.