Monitoring the dynamics of nanozeolite formation by combined in situ coherent small angle X-ray scattering techniques

IF 5.2 2区化学 Q1 CHEMISTRY, APPLIED Catalysis Today Pub Date : 2024-08-21 DOI:10.1016/j.cattod.2024.114992

Paulo R.A.F. Garcia , Paloma Vinaches , João-Paulo Zerba , Tiago A. Kalile , Amélie Rochet , Sibele B. Pergher , Florian Meneau

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Abstract

Understanding the dynamics of zeolite formation is key to synthesising high-quality zeolitic materials with controllable properties, in order to develop more efficient and performant materials. X-ray photon correlation spectroscopy (XPCS) using coherent X-rays offers new possibilities for in situ observation of nano to micron-scale fluctuation dynamics during crystal growth. An in situ cell, which is capable of collecting time-resolved coherent X-ray scattering data under hydrothermal conditions has been developed and used to study, by in situ XPCS combined with small and wide angle X-ray scattering, zeolite formation and dynamics. Analysis of the results using two-time correlations enables to accurately identify the successive growth and crystallisation steps, revealing the dissolution process of the LTA topology during the SOD growth. This approach opens a powerful new avenue for studying the dynamics of nanomaterials formation, phase transitions and growth processes under in situ conditions that will enable profound insights into the nanoscale synthesis mechanisms.

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利用原位相干小角 X 射线散射组合技术监测纳米沸石的形成动态

了解沸石形成的动力学是合成具有可控特性的高质量沸石材料的关键，从而开发出更高效、更高性能的材料。使用相干 X 射线的 X 射线光子相关光谱（XPCS）为现场观察晶体生长过程中纳米到微米尺度的波动动态提供了新的可能性。我们开发了一种能够在水热条件下收集时间分辨相干 X 射线散射数据的原位单元，并通过原位 XPCS 结合小角和广角 X 射线散射来研究沸石的形成和动力学。利用双时间相关性对结果进行分析，可准确识别连续的生长和结晶步骤，揭示 SOD 生长过程中 LTA 拓扑的溶解过程。这种方法为研究原位条件下纳米材料的形成、相变和生长过程的动力学开辟了一条强大的新途径，有助于深入了解纳米级合成机制。

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来源期刊

Catalysis Today 化学-工程：化工

CiteScore

11.50

自引率

3.80%

发文量

573

审稿时长

2.9 months

期刊介绍： Catalysis Today focuses on the rapid publication of original invited papers devoted to currently important topics in catalysis and related subjects. The journal only publishes special issues (Proposing a Catalysis Today Special Issue), each of which is supervised by Guest Editors who recruit individual papers and oversee the peer review process. Catalysis Today offers researchers in the field of catalysis in-depth overviews of topical issues. Both fundamental and applied aspects of catalysis are covered. Subjects such as catalysis of immobilized organometallic and biocatalytic systems are welcome. Subjects related to catalysis such as experimental techniques, adsorption, process technology, synthesis, in situ characterization, computational, theoretical modeling, imaging and others are included if there is a clear relationship to catalysis.