The pillared MWW (PMWW or MCM-36) and pillared MFI (PMFI) are two prominent representatives of meso-/microporous lamellar zeolites, which are made by pillaring of layered MCM-22(P) and multilamellar MFI precursors, respectively. They both consist of a 10-membered ring sinusoidal micropore channel within each zeolitic layer and mesopore voids created by pillars between two adjacent zeolitic layers. Although catalytic activities of PMWW and PMFI have been compared, identification of mesopore differences between these two pillared lamellar zeolites has not been attempted. In this work, we report the differences in mesopore characteristics between PMWW and PMFI zeolites probed by atomic layer deposition (ALD) of titania (ALD-TiO₂) species and a combination of structural, textural, composition and catalytic property analyses of the samples before and after ALD treatment, respectively. The results suggest PMFI has cylindrical mesopores with uniform sizes from pore entrance to main body, while PMWW has ink-bottle mesopores with the neck size much smaller than pore body. The communication between micropore and mesopore in PMFI is direct, but no communication exists in PMWW zeolites. The ALD-TiO₂ process considerably modified external surface composition of PMFI and PMWW zeolites, which consequently led to a new application of the pillared lamellar zeolite materials, i.e., photo-catalytically active meso-/microporous zeolites for environmental remedy reactions.

带柱状的MWW（PMWW或MCM-36）和带柱状的MFI（PMFI）是介孔/微孔层状沸石的两个主要代表，它们分别通过对层状MCM-22（P）和多层MFI前体进行柱化而制成。它们都由每个沸石层内的10元环正弦微孔通道和两个相邻沸石层之间的柱所产生的中孔空隙组成。尽管已比较了PMWW和PMFI的催化活性，但尚未尝试鉴定这两种柱状层状沸石之间的中孔差异。在这项工作中，我们报告了通过二氧化钛的原子层沉积（ALD）（ALD-TiO ₂）以及ALD处理前后样品的结构，结构，组成和催化特性分析的组合。结果表明，PMFI具有从孔入口到主体的均一尺寸的圆柱形中孔，而PMWW具有颈部尺寸远小于孔体的墨水瓶中孔。PMFI中微孔和中孔之间的通讯是直接的，但PMWW沸石中不存在通讯。ALD-TiO ₂工艺极大地改变了PMFI和PMWW沸石的外表面组成，从而导致了带柱状层状沸石材料的新应用，即用于环境修复反应的光催化活性介孔/微孔沸石。