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

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Author(s):
Garcia, Paulo R. A. F. ; Vinaches, Paloma ; Zerba, Joao-Paulo ; Kalile, Tiago A. ; Rochet, Amelie ; Pergher, Sibele B. ; Meneau, Florian
Total Authors: 7
Document type: Journal article
Source: CATALYSIS TODAY; v. 443, p. 7-pg., 2024-08-21.
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. (AU)

FAPESP's process: 17/23427-0 - Study of zeolites nucleation by Small-Angle X-ray Scattering and Coherent X-ray imaging techniques.
Grantee:Paloma Vinaches Melguizo
Support Opportunities: Scholarships in Brazil - Post-Doctoral
FAPESP's process: 21/06876-1 - Imaging working catalysts/catalytic correlations in nanoporous materials
Grantee:Florian Edouard Pierre Meneau
Support Opportunities: Research Grants - Young Investigators Grants - Phase 2
FAPESP's process: 17/23050-4 - Multi-modal approach probing noble-metal catalysts at work
Grantee:Amélie Claire Rochet
Support Opportunities: Research Grants - Young Investigators Grants