Although numerous strategies have been developed to improve the diffusion and catalytic activity of MWW-type titanosilicate (Ti-MWW zeolite) in oxidation of bulky molecules, preparation of Ti-MWW zeolite with high external specific surface area (SSA) by a simple and efficient method is still highly required. Herein, a facile organosilane-based synthetic strategy was successfully developed to prepare thin Ti-MWW zeolite with a thickness of 15 ± 5 nm and an external SSA as high as about 210 m² g⁻¹. Moreover, based on the structural characterization, the synthesis mechanism of the thin Ti-MWW zeolite was discussed in detail. Importantly, due to more framework TiO₄ species and their better accessibility, the obtained thin MWW-type titanosilicate showed superior catalytic performance in epoxidation of bulky olefins than conventional Ti-MWW zeolite. It is believed that this facile organosilane-based synthetic strategy can be used in the development of other highly efficient layered zeolite catalysts.

中文翻译：

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一种基于有机硅烷的简便策略，可直接合成具有高催化氧化性能的MWW型钛硅酸盐†

尽管已开发出许多策略来改善MWW型钛硅酸盐（Ti-MWW沸石）在大分子氧化中的扩散和催化活性，但通过简单高效的方法制备具有高外部比表面积（SSA）的Ti-MWW沸石该方法仍然是非常需要的。本文中，成功地开发了一种基于有机硅烷的简便合成策略，以制备厚度为15±5 nm且外部SSA高达210 m ² g ^-1的薄Ti-MWW沸石。此外，基于结构表征，详细讨论了Ti-MWW分子筛的合成机理。重要的是，由于更多的骨架TiO ₄所获得的MWW型钛硅酸盐稀薄物种及其可及性更好，在大体积烯烃的环氧化中显示出比常规Ti-MWW沸石优越的催化性能。据信，这种基于有机硅烷的简便合成策略可用于开发其他高效的层状沸石催化剂。