Facile synthesis of bifunctional Sn–B-self-pillared MFI zeolite nanosheets as highly selective catalyst for sucrose conversion to fructose
Facile synthesis of bifunctional Sn–B-self-pillared MFI zeolite nanosheets as highly selective catalyst for sucrose conversion to fructose
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DOI：
10.1016/j.micromeso.2022.112068
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发表时间：
2022-06
影响因子：
5.2
通讯作者：
Huifang Wu;Wei Huang;Jiaxing Zhang;Teng Du;Jincong Wang;Zichen Xu;Ruikai Xu;C. Meng;
中科院分区：
文献类型：
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作者：
Huifang Wu;Wei Huang;Jiaxing Zhang;Teng Du;Jincong Wang;Zichen Xu;Ruikai Xu;C. Meng;
在此，设计了一种双功能自柱MFI纳米片沸石（Sn-B-SPP）来实现蔗糖向果糖的高选择性转化，这对于自然界丰富的蔗糖的利用具有重要意义。这种含 Sn 和 B 的 SPP 沸石是通过基于 B-SPP 的简便固态离子交换方法制备的，克服了直接成核的困难。 Sn-B-SPP具有超薄共生纳米片材料的结构优势，例如高外表面积、极短的扩散长度和高度暴露的活性位点，有利于大块基底的转化。同时，协同的路易斯酸度和弱布朗斯台德酸度对于蔗糖在酒精中的转化至关重要，水解后4小时内果糖收率达到77.0%，远远超过其微孔类似物和传统分级Sn-B-MFI的性能。
Herein, a bifunctional self-pillared MFI nanosheets zeolite (Sn-B-SPP) is designed to achieve the highly selective conversion of sucrose to fructose, which is significant for utilization of the nature abundant sucrose. This Sn- and B-containing SPP zeolite was prepared through a facile solid-state ion exchange approach based on a B-SPP, which overcomes the difficulty of direct nucleation. Sn-B-SPP possesses the structural advantages of ultra-thin intergrown nanosheets materials such as high external surface area, extremely short diffusion length and highly exposed active sites, which are conducive for the conversion of bulky substrates. Meanwhile, the concerted Lewis acidity and weak Brønsted acidity are essential for the sucrose conversion in alcohol, achieving a 77.0% fructose yield in 4 h after hydrolysis, far surpassing the performance of its microporous analogue and conventional hierarchical Sn–B-MFI.