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Three-dimensional Imaging and Analysis of the Internal Structure of SAPO-34 Zeolite Crystals

Bai, X; Chen, B; Yang, F; Liu, X; Silva-Nunes, D; Robinson, I; (2018) Three-dimensional Imaging and Analysis of the Internal Structure of SAPO-34 Zeolite Crystals. RSC Advances , 8 (59) pp. 33631-33636. 10.1039/C8RA05918G. Green open access

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Abstract

SAPO-34 is widely used as a catalyst for important industrial reactions, such as the methanol-to-olefin (MTO) reaction and selective catalytic reduction (SCR) of nitrogen oxides (NOx). The internal structure of SAPO-34 has a great influence on the catalytic performance. Two-dimensional (2D) images of the SAPO-34 particle surfaces from scanning electron microscopy (SEM) show clearly well-faceted cube morphologies, which suggest they should be quite uniform perfect crystals. However, Bragg coherent X-ray diffraction imaging (BCDI) of the SAPO-34 particles shows a rich internal structure existing within these crystals. In this work, we investigated the internal structure of a SAPO-34 zeolite by serial block-face scanning electron microscopy (SBFSEM). The internal structure observed in the backscattered electron (BSE) micrographs from SBFSEM and the energy dispersive spectroscopy (EDS) measurements is found to be consistent with the BCDI results. From the three-dimensional (3D) structural images of SAPO-34 crystals obtained by SBFSEM, the domains within the individual SAPO-34 were visualized and quantified.

Type: Article
Title: Three-dimensional Imaging and Analysis of the Internal Structure of SAPO-34 Zeolite Crystals
Open access status: An open access version is available from UCL Discovery
DOI: 10.1039/C8RA05918G
Publisher version: https://doi.org/10.1039/C8RA05918G
Language: English
Additional information: Open Access: This article is licensed under a Creative Commons Attribution 3.0 Unported Licence (https://creativecommons.org/licenses/by/3.0/)
UCL classification: UCL > Provost and Vice Provost Offices
UCL > Provost and Vice Provost Offices > UCL BEAMS
UCL > Provost and Vice Provost Offices > UCL BEAMS > Faculty of Maths and Physical Sciences
UCL > Provost and Vice Provost Offices > UCL BEAMS > Faculty of Maths and Physical Sciences > London Centre for Nanotechnology
URI: http://discovery.ucl.ac.uk/id/eprint/10060247
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