Ex situ nucleation and growth study of the pure silica HPM-1 zeolite

Autor(es)

Vinaches, Paloma ^{[1, 2]} ; Meneau, Florian ^[1] ; Pergher, Sibele B. C. ^[2]

Afiliação do(s) autor(es)

^[1] Brazilian Ctr Res Energy & Mat CNPEM, Brazilian Synchrotron Light Lab LNLS, BR-13083970 Campinas, SP - Brazil

^[2] Univ Fed Rio Grande Norte UFRN, Lab Peneiras Mol LABPEMOL, Campus Lagoa Nova, BR-59078970 Natal, RN - Brazil

• Tipo de documento: Artigo Científico
• Fonte: Microporous and Mesoporous Materials; v. 315, FEB 2021.
• Citações Web of Science: 0

Resumo

In this manuscript, we reveal some insights into the nucleation and growth mechanism of pure silica zeolite HPM-1. This chiral material has attracted interest from academic and industrial researchers due to its potential for application in asymmetric catalysis and the separation of racemic products. We investigate four samples synthesized with different crystallization times and characterize them by X-ray diffraction, infrared spectroscopy, electron microscopy and small-angle X-ray scattering (SAXS). We propose a four-step synthesis mechanism based on the different populations of nanoparticles and the porous surface intermediate that is observed. We demonstrate that this synthesis follows a nonclassical mechanism of zeolitic nucleation and growth. (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: 14/25964-5 - Dos monômeros às nanopartículas: investigação in situ da formação de nanopartículas de ouro em tempo real por técnicas síncrotron e de microscopia
• Beneficiário: Florian Edouard Pierre Meneau
• Modalidade de apoio: Auxílio à Pesquisa - Jovens Pesquisadores