Core–shell strain structure of zeolite microcrystals
Abstract
Zeolites are crystalline aluminosilicate minerals featuring a network of 0.3–1.5-nm-wide pores, used in industry as catalysts for hydrocarbon interconversion, ion exchangers, molecular sieves and adsorbents1. For improved applications, it is highly useful to study the distribution of internal local strains because they sensitively affect the rates of adsorption and diffusion of guest molecules within zeolites2, 3. Here, we report the observation of an unusual triangular deformation field distribution in ZSM-5 zeolites by coherent X-ray diffraction imaging4, showing the presence of a strain within the crystal arising from the heterogeneous core–shell structure, which is supported by finite element model calculation and confirmed by fluorescence measurement. The shell is composed of H-ZSM-5 with intrinsic negative thermal expansion5 whereas the core exhibits a different thermal expansion behaviour due to the presence of organic template residues, which usually remain when the starting materials are insufficiently calcined. Engineering such strain effects could have a major impact on the design of future catalysts.
- Authors:
- Publication Date:
- Research Org.:
- Argonne National Lab. (ANL), Argonne, IL (United States)
- Sponsoring Org.:
- USDOE Office of Science (SC), Basic Energy Sciences (BES) (SC-22)
- OSTI Identifier:
- 1379207
- Report Number(s):
- ANL/XSD/JA-76581
Journal ID: ISSN 1476-1122; 76581
- DOE Contract Number:
- AC02-06CH11357
- Resource Type:
- Journal Article
- Journal Name:
- Nature Materials
- Additional Journal Information:
- Journal Volume: 12; Journal Issue: 8; Journal ID: ISSN 1476-1122
- Publisher:
- Nature Publishing Group
- Country of Publication:
- United States
- Language:
- English
- Subject:
- 36 MATERIALS SCIENCE
Citation Formats
Cha, Wonsuk, Jeong, Nak Cheon, Song, Sanghoon, Park, Hyun-jun, Thanh Pham, Tung Cao, Harder, Ross, Lim, Bobae, Xiong, Gang, Ahn, Docheon, McNulty, Ian, Kim, Jungho, Yoon, Kyung Byung, Robinson, Ian K., and Kim, Hyunjung. Core–shell strain structure of zeolite microcrystals. United States: N. p., 2013.
Web. doi:10.1038/nmat3698.
Cha, Wonsuk, Jeong, Nak Cheon, Song, Sanghoon, Park, Hyun-jun, Thanh Pham, Tung Cao, Harder, Ross, Lim, Bobae, Xiong, Gang, Ahn, Docheon, McNulty, Ian, Kim, Jungho, Yoon, Kyung Byung, Robinson, Ian K., & Kim, Hyunjung. Core–shell strain structure of zeolite microcrystals. United States. doi:10.1038/nmat3698.
Cha, Wonsuk, Jeong, Nak Cheon, Song, Sanghoon, Park, Hyun-jun, Thanh Pham, Tung Cao, Harder, Ross, Lim, Bobae, Xiong, Gang, Ahn, Docheon, McNulty, Ian, Kim, Jungho, Yoon, Kyung Byung, Robinson, Ian K., and Kim, Hyunjung. Sun .
"Core–shell strain structure of zeolite microcrystals". United States. doi:10.1038/nmat3698.
@article{osti_1379207,
title = {Core–shell strain structure of zeolite microcrystals},
author = {Cha, Wonsuk and Jeong, Nak Cheon and Song, Sanghoon and Park, Hyun-jun and Thanh Pham, Tung Cao and Harder, Ross and Lim, Bobae and Xiong, Gang and Ahn, Docheon and McNulty, Ian and Kim, Jungho and Yoon, Kyung Byung and Robinson, Ian K. and Kim, Hyunjung},
abstractNote = {Zeolites are crystalline aluminosilicate minerals featuring a network of 0.3–1.5-nm-wide pores, used in industry as catalysts for hydrocarbon interconversion, ion exchangers, molecular sieves and adsorbents1. For improved applications, it is highly useful to study the distribution of internal local strains because they sensitively affect the rates of adsorption and diffusion of guest molecules within zeolites2, 3. Here, we report the observation of an unusual triangular deformation field distribution in ZSM-5 zeolites by coherent X-ray diffraction imaging4, showing the presence of a strain within the crystal arising from the heterogeneous core–shell structure, which is supported by finite element model calculation and confirmed by fluorescence measurement. The shell is composed of H-ZSM-5 with intrinsic negative thermal expansion5 whereas the core exhibits a different thermal expansion behaviour due to the presence of organic template residues, which usually remain when the starting materials are insufficiently calcined. Engineering such strain effects could have a major impact on the design of future catalysts.},
doi = {10.1038/nmat3698},
journal = {Nature Materials},
issn = {1476-1122},
number = 8,
volume = 12,
place = {United States},
year = {2013},
month = {7}
}
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