介观结构沸石形成的纳米级研究 FAU 和 LTL

IF 4.8 3区材料科学 Q1 CHEMISTRY, APPLIED Microporous and Mesoporous Materials Pub Date : 2024-10-05 DOI:10.1016/j.micromeso.2024.113363

Vladimir Zholobenko , Martin Hollamby , Aqeel Al-Ani , Oleg I. Lebedev , Andrew J. Smith , Tim Snow

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引用次数: 0

摘要

纳米结构材料可作为潜在的催化剂，用于从生物质衍生分子中生产平台化学品和可再生生物燃料。我们利用时间分辨原位同步辐射光散射和扫描电镜分析法（SAXS）和原位同步辐射光散射和扫描电镜分析法（WAXS）研究了通过表面活性剂辅助串联酸碱合成后处理形成分层介微孔沸石 LTL 和 FAU 的过程，从而对介结构处理的机理有了新的认识。根据 TEM 和原位同步辐射测量的结果，提出了 LTL 沸石晶体核壳结构的形成模型。利用傅立叶变换红外光谱、核磁共振和氮吸附进行的补充评估，以及对介观结构沸石进行的反应研究表明，由于活性位点的可及性增加，传输限制减少，这些材料具有提高催化性能的潜力。

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A nanoscale investigation of the formation of mesostructured zeolites FAU and LTL

Nanostructured materials can be utilised as potential catalysts for the production of platform chemicals and renewable biofuels from biomass derived molecules. The formation of hierarchical meso-microporous zeolites LTL and FAU via the surfactant assisted tandem acid-base post-synthesis treatment has been investigated by time-resolved in situ synchrotron SAXS and WAXS, providing a new insight into the mechanism of the mesostructuring treatment. Based on the results of TEM and in situ synchrotron measurements, a model for the formation of the core-shell structure of LTL zeolite crystals is proposed. Complementary evaluation using FTIR, NMR and nitrogen adsorption, in conjunction with reaction studies on mesostructured zeolites, demonstrated a potential for enhanced catalytic performance of these materials owing to the increased accessibility of the active sites and reduced transport limitations.

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来源期刊

Microporous and Mesoporous Materials 化学-材料科学：综合

CiteScore

10.70

自引率

5.80%

发文量

649

审稿时长

26 days

期刊介绍： Microporous and Mesoporous Materials covers novel and significant aspects of porous solids classified as either microporous (pore size up to 2 nm) or mesoporous (pore size 2 to 50 nm). The porosity should have a specific impact on the material properties or application. Typical examples are zeolites and zeolite-like materials, pillared materials, clathrasils and clathrates, carbon molecular sieves, ordered mesoporous materials, organic/inorganic porous hybrid materials, or porous metal oxides. Both natural and synthetic porous materials are within the scope of the journal. Topics which are particularly of interest include: All aspects of natural microporous and mesoporous solids The synthesis of crystalline or amorphous porous materials The physico-chemical characterization of microporous and mesoporous solids, especially spectroscopic and microscopic The modification of microporous and mesoporous solids, for example by ion exchange or solid-state reactions All topics related to diffusion of mobile species in the pores of microporous and mesoporous materials Adsorption (and other separation techniques) using microporous or mesoporous adsorbents Catalysis by microporous and mesoporous materials Host/guest interactions Theoretical chemistry and modelling of host/guest interactions All topics related to the application of microporous and mesoporous materials in industrial catalysis, separation technology, environmental protection, electrochemistry, membranes, sensors, optical devices, etc.