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Title: Self-seeded growth of very large open-structured zeolite nanosheet assemblies with extraordinary micropore accessibility

Abstract

Zeolite nanosheets (ZNs) offer improved micropore accessibilities and transport properties for enhanced molecular catalysis and separations. However, practical application of the ZN materials is hampered by the lack of efficient synthesis methods. Here, in this work, a ZN self-seeded method is demonstrated for single-step reproduction of flower-like assemblies of very large MFI ZN plates. The ZN plates are ~60 nm-thick stacks of 4-nm-thick single-crystal sheets. The ZN flower growth involves terrace nucleation on the seed surfaces and subsequent ZN epitaxial growth in [010] orientation directed by a diquaternary agent. The open architecture of the assemblies prevented collapse and agglomeration of ZNs during thermal activation that effectively preserved the interconnected intra-sheet and inter-sheet micropore system. Thus, the ZN assemblies exhibited markedly enhanced molecular adsorption capacity and transport diffusivity for the probing xylene molecules as compared to the conventional crystals. The ZN assembly and its harvestable very large-sized ZNs have the potential for developing high-performance ZN adsorbents, catalysts, and molecular-sieve membranes.

Authors:
ORCiD logo [1];  [1];  [1];  [2];  [2]; ORCiD logo [1]
  1. Univ. of Cincinnati, OH (United States)
  2. Cleveland State Univ., Cleveland, OH (United States)
Publication Date:
Research Org.:
Bettergy Corp., Peekskill, NY (United States)
Sponsoring Org.:
USDOE Office of Science (SC); National Science Foundation (NSF)
OSTI Identifier:
1977449
Alternate Identifier(s):
OSTI ID: 1861140
Grant/Contract Number:  
SC0020011; 1935205
Resource Type:
Accepted Manuscript
Journal Name:
Microporous and Mesoporous Materials
Additional Journal Information:
Journal Volume: 336; Journal ID: ISSN 1387-1811
Publisher:
Elsevier
Country of Publication:
United States
Language:
English
Subject:
36 MATERIALS SCIENCE; Zeolite nanosheet; Assembly; Self-seeding; Adsorption; Transport

Citation Formats

Cao, Zishu, Iskhakova, Landysh, Sun, Xinhui, Anjikar, Ninad D., Yang, Shaowei, and Dong, Junhang. Self-seeded growth of very large open-structured zeolite nanosheet assemblies with extraordinary micropore accessibility. United States: N. p., 2022. Web. doi:10.1016/j.micromeso.2022.111854.
Cao, Zishu, Iskhakova, Landysh, Sun, Xinhui, Anjikar, Ninad D., Yang, Shaowei, & Dong, Junhang. Self-seeded growth of very large open-structured zeolite nanosheet assemblies with extraordinary micropore accessibility. United States. https://doi.org/10.1016/j.micromeso.2022.111854
Cao, Zishu, Iskhakova, Landysh, Sun, Xinhui, Anjikar, Ninad D., Yang, Shaowei, and Dong, Junhang. Thu . "Self-seeded growth of very large open-structured zeolite nanosheet assemblies with extraordinary micropore accessibility". United States. https://doi.org/10.1016/j.micromeso.2022.111854. https://www.osti.gov/servlets/purl/1977449.
@article{osti_1977449,
title = {Self-seeded growth of very large open-structured zeolite nanosheet assemblies with extraordinary micropore accessibility},
author = {Cao, Zishu and Iskhakova, Landysh and Sun, Xinhui and Anjikar, Ninad D. and Yang, Shaowei and Dong, Junhang},
abstractNote = {Zeolite nanosheets (ZNs) offer improved micropore accessibilities and transport properties for enhanced molecular catalysis and separations. However, practical application of the ZN materials is hampered by the lack of efficient synthesis methods. Here, in this work, a ZN self-seeded method is demonstrated for single-step reproduction of flower-like assemblies of very large MFI ZN plates. The ZN plates are ~60 nm-thick stacks of 4-nm-thick single-crystal sheets. The ZN flower growth involves terrace nucleation on the seed surfaces and subsequent ZN epitaxial growth in [010] orientation directed by a diquaternary agent. The open architecture of the assemblies prevented collapse and agglomeration of ZNs during thermal activation that effectively preserved the interconnected intra-sheet and inter-sheet micropore system. Thus, the ZN assemblies exhibited markedly enhanced molecular adsorption capacity and transport diffusivity for the probing xylene molecules as compared to the conventional crystals. The ZN assembly and its harvestable very large-sized ZNs have the potential for developing high-performance ZN adsorbents, catalysts, and molecular-sieve membranes.},
doi = {10.1016/j.micromeso.2022.111854},
journal = {Microporous and Mesoporous Materials},
number = ,
volume = 336,
place = {United States},
year = {Thu Mar 31 00:00:00 EDT 2022},
month = {Thu Mar 31 00:00:00 EDT 2022}
}

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