Facile and fast synthesis of highly active Lewis acid MWW zeolite from pure silica ITQ-1,Inorganic Chemistry Frontiers

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Facile and fast synthesis of highly active Lewis acid MWW zeolite from pure silica ITQ-1
Inorganic Chemistry Frontiers ( IF 6.1 ) Pub Date : 2022-05-24 , DOI: 10.1039/d2qi00611a
Tianlong Wang ₁ , Wei Huang ₁ , He Han ₂ , Jiaxing Zhang ₂ , Huifang Wu ₁ , Xin Yan ₁ , Yuanjuan Jiang ₁ , Lu Fang ₁ , Bochun Zhang ₁ , Xinwen Guo ₂ , Limin Ren ₁

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A facile hydrothermal etching–healing strategy is proposed to fabricate a Sn-MWW zeolite based on a pure silica ITQ-1 precursor, which avoids using any supporting agents and additives, such as B³⁺ and Na⁺. Thus, post-synthetic acid treatments for the removal of such additives to ensure catalytic performance are not required, which is a great improvement to the conventional Sn-MWW synthetic route. Moreover, low organic structure-directing agent (SDA) consumption and rapid growth make this approach practically attractive. The growth mechanism study reveals the crucial etching and healing dual functional role of the SDA, which leads to successful Sn introduction. The obtained Sn-MWW exhibits excellent glucose isomerization catalytic performance owing to the “clean” (without the side effect of additives) and well-defined Sn sites.

中文翻译：

从纯二氧化硅 ITQ-1 简便快速合成高活性路易斯酸 MWW 沸石

提出了一种简便的水热蚀刻修复策略，以制备基于纯二氧化硅 ITQ-1 前体的 Sn-MWW 沸石，避免使用任何支持剂和添加剂，如 B ³⁺和 Na ⁺. 因此，不需要用于去除这些添加剂以确保催化性能的合成后酸处理，这对传统的 Sn-MWW 合成路线是一个很大的改进。此外，低有机结构导向剂 (SDA) 消耗和快速增长使这种方法具有实际吸引力。生长机制研究揭示了 SDA 的关键蚀刻和愈合双重功能作用，这导致了 Sn 的成功引入。由于“清洁”（没有添加剂的副作用）和明确的 Sn 位点，所获得的 Sn-MWW 表现出优异的葡萄糖异构化催化性能。

更新日期：2022-05-24

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