Template-Free Synthesis of Highly b-Oriented MFI-Type Zeolite Thin Films by Seeded Secondary Growth

Fateme Banihashemi; Amr F.M. Ibrahim; Ali Akbar Babaluo; Jerry Lin

doi:10.1002/anie.201814248

Template-Free Synthesis of Highly b-Oriented MFI-Type Zeolite Thin Films by Seeded Secondary Growth

Fateme Banihashemi, Amr F.M. Ibrahim, Ali Akbar Babaluo, Jerry Lin

Research output: Contribution to journal › Article › peer-review

40 Scopus citations

Abstract

Highly b-oriented, closely packed, MFI zeolite films are prepared on seeded stainless-steel plates using organic template-free, secondary growth solutions, containing aluminum sulfate as a crystallization agent. The number of a-oriented twin crystals is significantly reduced, and even eliminated, simply by restricting the pH value of the secondary growth solution to the narrow range of 11.1–11.3. Values of pH can be adjusted through the controlled addition of (NH ₄ ) ₂ SO ₄ or H ₂ SO ₄ to secondary growth solutions of the composition (1 SiO ₂ :0.57 NaOH:137.5 H ₂ O:0.0050 (Al ₂ (SO ₄ ) ₃ ⋅18 H ₂ O)) or by simply decreasing the molar composition of NaOH with no extra additives.

Original language	English (US)
Pages (from-to)	2519-2523
Number of pages	5
Journal	Angewandte Chemie - International Edition
Volume	58
Issue number	8
DOIs	https://doi.org/10.1002/anie.201814248
State	Published - Feb 18 2019

Keywords

MFI zeolite
b-oriented
pH effect
secondary growth
template-free

ASJC Scopus subject areas

Catalysis
General Chemistry

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10.1002/anie.201814248

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title = "Template-Free Synthesis of Highly b-Oriented MFI-Type Zeolite Thin Films by Seeded Secondary Growth",

abstract = " Highly b-oriented, closely packed, MFI zeolite films are prepared on seeded stainless-steel plates using organic template-free, secondary growth solutions, containing aluminum sulfate as a crystallization agent. The number of a-oriented twin crystals is significantly reduced, and even eliminated, simply by restricting the pH value of the secondary growth solution to the narrow range of 11.1–11.3. Values of pH can be adjusted through the controlled addition of (NH 4 ) 2 SO 4 or H 2 SO 4 to secondary growth solutions of the composition (1 SiO 2 :0.57 NaOH:137.5 H 2 O:0.0050 (Al 2 (SO 4 ) 3 ⋅18 H 2 O)) or by simply decreasing the molar composition of NaOH with no extra additives.",

keywords = "MFI zeolite, b-oriented, pH effect, secondary growth, template-free",

author = "Fateme Banihashemi and Ibrahim, {Amr F.M.} and Babaluo, {Ali Akbar} and Jerry Lin",

note = "Funding Information: J.Y.S.L. is grateful for the support of Department of Energy (DE-FE0026435) on MFI zeolite membrane research. Publisher Copyright: {\textcopyright} 2019 Wiley-VCH Verlag GmbH & Co. KGaA, Weinheim",

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AU - Babaluo, Ali Akbar

AU - Lin, Jerry

N1 - Funding Information: J.Y.S.L. is grateful for the support of Department of Energy (DE-FE0026435) on MFI zeolite membrane research. Publisher Copyright: © 2019 Wiley-VCH Verlag GmbH & Co. KGaA, Weinheim

PY - 2019/2/18

Y1 - 2019/2/18

N2 - Highly b-oriented, closely packed, MFI zeolite films are prepared on seeded stainless-steel plates using organic template-free, secondary growth solutions, containing aluminum sulfate as a crystallization agent. The number of a-oriented twin crystals is significantly reduced, and even eliminated, simply by restricting the pH value of the secondary growth solution to the narrow range of 11.1–11.3. Values of pH can be adjusted through the controlled addition of (NH 4 ) 2 SO 4 or H 2 SO 4 to secondary growth solutions of the composition (1 SiO 2 :0.57 NaOH:137.5 H 2 O:0.0050 (Al 2 (SO 4 ) 3 ⋅18 H 2 O)) or by simply decreasing the molar composition of NaOH with no extra additives.

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KW - MFI zeolite

KW - b-oriented

KW - pH effect

KW - secondary growth

KW - template-free

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Template-Free Synthesis of Highly b-Oriented MFI-Type Zeolite Thin Films by Seeded Secondary Growth

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Keywords

ASJC Scopus subject areas

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