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

Autor(es)

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

• Tipo de documento: Artigo Científico
• Fonte: CATALYSIS TODAY; v. 443, p. 7-pg., 2024-08-21.

Resumo

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)

• Processo FAPESP: 17/23427-0 - Estudo de nucleação de zeólitas mediante medidas de espalhamento de raios-X a baixos ângulos e técnicas de imagem com raios-X coerente.
• Beneficiário: Paloma Vinaches Melguizo
• Modalidade de apoio: Bolsas no Brasil - Pós-Doutorado
• Processo FAPESP: 21/06876-1 - Imageamento de sistemas catalíticos em tempo real/correlações temporais da atívidade catalítica em materais nanoporosos
• Beneficiário: Florian Edouard Pierre Meneau
• Modalidade de apoio: Auxílio à Pesquisa - Jovens Pesquisadores - Fase 2
• Processo FAPESP: 17/23050-4 - Abordagem multimodal para caracterizar catalisadores em operação
• Beneficiário: Amélie Claire Rochet
• Modalidade de apoio: Auxílio à Pesquisa - Jovens Pesquisadores