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

Author(s)

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

Affiliation

^[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

• Document type: Journal article
• Source: Microporous and Mesoporous Materials; v. 315, FEB 2021.
• Web of Science Citations: 0

Abstract

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)

• 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 type: Scholarships in Brazil - Post-Doctorate
• FAPESP's process: 14/25964-5 - From the monomers to the nanoparticles: in situ real time investigation of gold nanoparticles formation by synchrotron and microscopy techniques
• Grantee: Florian Edouard Pierre Meneau
• Support type: Research Grants - Young Investigators Grants