Synthesis and application of chainlike MFI type zeolites
Chainlike MFI type zeolites were formed by the condensation of uniformly sized crystals along the b-axis direction through surface hydroxyl groups,which not only maintianed traditional zeolites'unique three-dimensional pore structure,acid resistance,hydrothermal stability,and high catalytic activity,but also showed higher shape selectivity,endowing them with unique properties in many fields such as adsorption,separation and catalysis.This paper systematically presented the current research development on the synthesis of chainlike MFI type zeolites and their application,focusing on the two synthesis methods of conventional hydrothermal and microwave-assisted hydrothermal synthesis.In addition,it analyzed the formation mechanism of chainlike MFI type zeolites in depth,elaborated on the various factors inducing the condensation of Si—OH groups,and then concluded the excellent catalytic and adsorptive performance of chainlike MFI type zeolites.Finally,an outlook on the green synthesis and potential application about chainlike MFI type zeolites was given,and the analysis on the evolution of silicon coordination environment was proposed as an important direction for further exploring their synthesis mechanism,which would lay an essential theoretical foundation for expanding the application of chainlike MFI type zeolites in the future.
chainlike morphologyMFI type zeolitessynthesiscatalysis
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