From amorphous to crystalline: Transformation of silica membranes into silicalite-1 (MFI) zeolite layers

Pelin Karakiliç, Ryo Toyoda, Freek Kapteijn, Arian Nijmeijer, Louis Winnubst

Research output: Contribution to journalArticleAcademicpeer-review

Abstract

The transformation of microporous, amorphous silica membranes into b-oriented silicalite-1 (MFI) zeolite layers via in-situ crystallisation was investigated. The effect of synthesis parameters, such as the type and concentration of the silica precursor, crystallisation time and temperature, on the morphology of silicalite-1 (MFI) zeolite layers was studied. By optimizing these parameters, silicalite-1 zeolite layers were formed from the already-deposited silica layers, which promotes the crystallisation from the surface in the preferred b-orientation. The use of a monomeric silica precursor, which has slower hydrolysis kinetics than a colloidal one, resulted in the formation of zeolite crystals via heterogeneous nucleation on the surface and suppressed the formation of crystal nuclei in the liquid media via homogeneous nucleation, which then would further deposit onto the surface in a random orientation. Lastly, by optimizing the crystallisation time and temperature of the synthesis, thickness, coverage and orientation of silicalite-1 zeolite layers were controlled.
LanguageEnglish
Pages52-61
JournalMicroporous and mesoporous materials
Volume276
DOIs
Publication statusPublished - 1 Mar 2019

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Zeolites
Silicon Dioxide
Crystallization
Silica
silicon dioxide
Crystalline materials
membranes
Membranes
crystallization
Crystal orientation
Nucleation
Crystals
nucleation
Hydrolysis
synthesis
Deposits
crystals
hydrolysis
Temperature
Kinetics

Cite this

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title = "From amorphous to crystalline: Transformation of silica membranes into silicalite-1 (MFI) zeolite layers",
abstract = "The transformation of microporous, amorphous silica membranes into b-oriented silicalite-1 (MFI) zeolite layers via in-situ crystallisation was investigated. The effect of synthesis parameters, such as the type and concentration of the silica precursor, crystallisation time and temperature, on the morphology of silicalite-1 (MFI) zeolite layers was studied. By optimizing these parameters, silicalite-1 zeolite layers were formed from the already-deposited silica layers, which promotes the crystallisation from the surface in the preferred b-orientation. The use of a monomeric silica precursor, which has slower hydrolysis kinetics than a colloidal one, resulted in the formation of zeolite crystals via heterogeneous nucleation on the surface and suppressed the formation of crystal nuclei in the liquid media via homogeneous nucleation, which then would further deposit onto the surface in a random orientation. Lastly, by optimizing the crystallisation time and temperature of the synthesis, thickness, coverage and orientation of silicalite-1 zeolite layers were controlled.",
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language = "English",
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journal = "Microporous and mesoporous materials",
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From amorphous to crystalline : Transformation of silica membranes into silicalite-1 (MFI) zeolite layers. / Karakiliç, Pelin ; Toyoda, Ryo; Kapteijn, Freek; Nijmeijer, Arian; Winnubst, Louis.

In: Microporous and mesoporous materials, Vol. 276, 01.03.2019, p. 52-61.

Research output: Contribution to journalArticleAcademicpeer-review

TY - JOUR

T1 - From amorphous to crystalline

T2 - Microporous and mesoporous materials

AU - Karakiliç, Pelin

AU - Toyoda, Ryo

AU - Kapteijn, Freek

AU - Nijmeijer, Arian

AU - Winnubst, Louis

PY - 2019/3/1

Y1 - 2019/3/1

N2 - The transformation of microporous, amorphous silica membranes into b-oriented silicalite-1 (MFI) zeolite layers via in-situ crystallisation was investigated. The effect of synthesis parameters, such as the type and concentration of the silica precursor, crystallisation time and temperature, on the morphology of silicalite-1 (MFI) zeolite layers was studied. By optimizing these parameters, silicalite-1 zeolite layers were formed from the already-deposited silica layers, which promotes the crystallisation from the surface in the preferred b-orientation. The use of a monomeric silica precursor, which has slower hydrolysis kinetics than a colloidal one, resulted in the formation of zeolite crystals via heterogeneous nucleation on the surface and suppressed the formation of crystal nuclei in the liquid media via homogeneous nucleation, which then would further deposit onto the surface in a random orientation. Lastly, by optimizing the crystallisation time and temperature of the synthesis, thickness, coverage and orientation of silicalite-1 zeolite layers were controlled.

AB - The transformation of microporous, amorphous silica membranes into b-oriented silicalite-1 (MFI) zeolite layers via in-situ crystallisation was investigated. The effect of synthesis parameters, such as the type and concentration of the silica precursor, crystallisation time and temperature, on the morphology of silicalite-1 (MFI) zeolite layers was studied. By optimizing these parameters, silicalite-1 zeolite layers were formed from the already-deposited silica layers, which promotes the crystallisation from the surface in the preferred b-orientation. The use of a monomeric silica precursor, which has slower hydrolysis kinetics than a colloidal one, resulted in the formation of zeolite crystals via heterogeneous nucleation on the surface and suppressed the formation of crystal nuclei in the liquid media via homogeneous nucleation, which then would further deposit onto the surface in a random orientation. Lastly, by optimizing the crystallisation time and temperature of the synthesis, thickness, coverage and orientation of silicalite-1 zeolite layers were controlled.

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