Connectivity assessment in hierarchical zeolites by correlating nuclear magnetic resonance, electron microscopy/tomography and adsorption scanning
Medeiros-Costa IC, Wisser D, Catita L, Lesage A, Lefebvre V, Gay AS, Rouchon V, Laroche C, Pérez-Pellitero J, Coasne B (2024)
Publication Type: Journal article
Publication year: 2024
Journal
Book Volume: 315
Article Number: 128969
DOI: 10.1016/j.matchemphys.2024.128969
Abstract
Hierarchical zeolites presenting different pore domains have the potential to reduce problems associated with low diffusion in zeolites, thus holding great promise in a wide range of application fields. Nevertheless, efficient transfer between the different porous networks is required for the mesopores (2–50 nm) and macropores (>50 nm) to be effective in promoting the transit of molecules towards the micropores (<2 nm). In this work, the connectivity between the various pore domains in a class of hierarchical zeolites – denominated as nanoparticle aggregates – is investigated through 2D exchange spectroscopy (EXSY) 1H nuclear magnetic resonance (NMR) using paraxylene as a probe molecule. This approach allows to track whether the probe molecule visits distinct pore environments over time, providing unique insight into pore connectivity. The analysis of scanning curves through N2 adsorption/desorption cycles completes the characterization of pore connectivity. Furthermore, electron microscopy and tomography are used as visual techniques to confirm the arrangement of the mesoporous and macroporous networks generated by the nanoparticle aggregates.
Authors with CRIS profile
Involved external institutions
IFP Energies nouvelles
France (FR)
École normale supérieure de Lyon (ENS)
France (FR)
University of Grenoble Alpes (UGA) / Université de Grenoble
France (FR)
France (FR)
École normale supérieure de Lyon (ENS)
France (FR)
University of Grenoble Alpes (UGA) / Université de Grenoble
France (FR)
How to cite
APA:
Medeiros-Costa, I.C., Wisser, D., Catita, L., Lesage, A., Lefebvre, V., Gay, A.S.,... Coasne, B. (2024). Connectivity assessment in hierarchical zeolites by correlating nuclear magnetic resonance, electron microscopy/tomography and adsorption scanning. Materials Chemistry and Physics, 315. https://doi.org/10.1016/j.matchemphys.2024.128969
MLA:
Medeiros-Costa, Izabel C., et al. "Connectivity assessment in hierarchical zeolites by correlating nuclear magnetic resonance, electron microscopy/tomography and adsorption scanning." Materials Chemistry and Physics 315 (2024).
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