日本ゼオライト学会　刊行物 Publication of Japan Zeolite Association

Zeolites and zeotype microporous materials have conventionally been synthesized through hydrothermal treatment under batch operation, which suffers from disadvantages such as time-consuming and low-energy efficiency. Considering the wide applications of zeolites and zeotype materials, developing an efficient synthesis route is of high significance. The emergence of ultrafast synthesis on the order of minutes has offered an opportunity to pave the way for overcoming the drawbacks of long-time hydrothermal treatment. Continuous flow synthesis of zeolites has also been established, thanks to the ultrashort synthesis period. In this review, we summarize our recent progresses on the ultrafast syntheses of zeolites and zeotype materials, including aluminosilicate zeolite (SSZ-13), purely siliceous zeolite (silicalite-1) and aluminophosphate (AlPO₄–5). The method of ultrafast synthesis is deeply discussed on the basis of individual material. Thereafter, the continuous flow syntheses of AlPO₄–5 and SSZ-13 are described, through which we provide our concepts on how to develop a continuous flow synthesis. Ultrafast synthesis can also be combined with the bead milling technique, which creates an efficient way to tune the particle size of zeolites. This top-down method for ultrafast tuning of nanosized zeolites is then discussed.