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

Author(s)

Garcia, Paulo R. A. F. ; Vinaches, Paloma ; Zerba, Joao-Paulo ; Kalile, Tiago A. ; Rochet, Amelie ; Pergher, Sibele B. ; Meneau, Florian

• 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