3D ptychography characterization of hierarchical ZSM-5 crystals: visualizing pore architecture at the single-crystal level
Palavras-chave:
ZSM-5, hierarchical zeolites, ptycography, ethanol upgrading, 3D imagingResumo
Hierarchical zeolites offer improved catalytic performance due to enhanced accessibility and reduced diffusion limitations. Here, we synthesized ZSM-5 particles with controlled size and morphology, aiming at their application in ethanol valorization reactions. The main novelty of this study is the use of 3D X-ray ptychography to investigate the internal porosity of individual zeolite crystals. Ptychographic reconstructions revealed unprecedented structural information, such as pore connectivity and heterogeneity within crystals, not accessible by conventional techniques. Electron density distributions enabled segmentation of the pore and zeolite domains, providing a quantitative porosity mapping. These results demonstrate the potential of coherent imaging techniques for guiding the design of zeolites with improved performance in biomass conversion reactions.
Referências
1. B. M. Weckhuysen; et al. Chem. Soc. Rev. 2015, 44, 7022–7024.
2. W. Cha; et al. Nat. Mater. 2013, 12, 729–734.
3. J. Kang; et al. Nat. Commun. 2020, 11, 5901.
4. S. Mitchell; et al. Nat. Commun. 2015, 6, 8633.
5. V. Favre-Nicolin; et al. J. Appl. Crystallogr. 2020, 53, 1404–1413.
6. W. Cha; et al. New J. Phys. 2010, 12, 035022.
7. A. Levitan; et al. “CDTools 0.2.0 (Python package)” 2024, https://github.com/cdtools-developers/cdtools.
8. K. Wakonig; et al. J. Appl. Crystallogr. 2020, 53, 574–586.
