“…The final crystal morphology is governed by both the intrinsic nature of the zeolite topology and many synthetic parameters, such as chemical composition, solvent, additives, crystallization temperature, etc. To restrict the growth rate along the b-axis of MFI zeolite, many strategies, as illustrated in Scheme 1, have been developed including 1) the design of novel organic structuredirecting agents (OSDA) to prevent the stacking of extra pentasil layers, as a result, 1-2 pentasillayered MFI zeolite is synthesized [15,16]; 2) the use of fluoride anion promoting the plate-like crystal formation [17,18], and the b-thickness of MFI crystals reaches down to around 10 nm [19,20]; 3) the introduction of additive molecules to inhibit the growth along b-axis or promote the growth in other directions [21,22]; and 4) the variation of the synthetic conditions, for instance, gel composition, seeds, pH, and recrystallization, can also produce MFI crystal with short b-thickness [23][24][25]. A summary of developed methods regarding safety, cost, availability, and efficiency issues is presented.…”