An Investigation of the Behavior of Completely Siliceous Zeolite ZSM-5 under High External Pressures

Fu, Yueqiao; Song, Yang; Huang, Yining

doi:10.1021/jp205107u

Cited by 20 publications

(19 citation statements)

References 56 publications

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“…The similar structure flexibility to its anhydrous analogue in non-penetrating PTM indicates that the hydrated AlPO 4 -17 becomes more compressible as the pressure increased and that, as in the dehydrated phase, exhibits an elastic instability. Such behavior is the opposite to the structural changes as a function of pressure observed in other zeolites, which exhibit pressure-induced stiffening of the structure [22,23,24]. As evidenced by the evolution of the relative volume with pressure, there are at least four pressure ranges with different compressibility values before completely amorphization, and from which the three first, up to 3.2 GPa, seems to present pressure-induced softening, which decreases as the pressure increases.…”

Section: Discussionmentioning

confidence: 90%

Effect of H2O on the Pressure-Induced Amorphization of Hydrated AlPO4-17

et al. 2019

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The incorporation of guest species in zeolites has been found to strongly modify their mechanical behavior and their stability with respect to amorphization at high pressure (HP). Here we report the strong effect of H2O on the pressure-induced amorphization (PIA) in hydrated AlPO4-17. The material was investigated in-situ at HP by synchrotron X-ray powder diffraction in diamond anvil cells by using non- and penetrating pressure transmitting media (PTM), respectively, silicone oil and H2O. Surprisingly, in non-penetrating PTM, its structural response to pressure was similar to its anhydrous phase at lower pressures up to ~1.4 GPa, when the amorphization was observed to start. Compression of the structure of AlPO4-17 is reduced by an order of magnitude when the material is compressed in H2O, in which amorphization begins in a similar pressure range as in non-penetrating PTM. The complete and irreversible amorphization was observed at ~9.0 and ~18.7 GPa, respectively, in non- and penetrating PTM. The present results show that the insertion of guest species can be used to strongly modify the stability of microporous material with respect to PIA, by up to an order of magnitude.

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Section: Discussionmentioning

confidence: 90%

Effect of H2O on the Pressure-Induced Amorphization of Hydrated AlPO4-17

et al. 2019

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“…The solvent molecules occluded in the channels of as-made framework are believed to play ak ey role in restoring the structure and crystallinity of the framework when the pressure was released. Previouss tudies on as-made ZSM-5 [21] under high pressure showedt hat the interaction between the template molecules and zeolite framework preserves the local structures associated with the originalt opology at high pressure and, on releasing the pressure, the template redirects the silicate speciest op artially reform the initial topology.F or the as-made framework of MIL-68(In), the DMF solvent molecules may play as imilarr ole to that of template molecules in ZSM-5.F or the activated framework, the weakening and soft behavior of OH modes is associated with the formationo fh ydrogen bonds between the adjacent In-O octahedra in the framework. The OH modes are not recoveredo nc omplete decompression, as the empty framework is partially modified duringc ompression.T he existence of solvent molecules is thus clearlyp ivotal to the reversibility of the framework.…”

Section: Discussionmentioning

confidence: 98%

“…The solvent molecules occluded in the channels of as‐made framework are believed to play a key role in restoring the structure and crystallinity of the framework when the pressure was released. Previous studies on as‐made ZSM‐521 under high pressure showed that the interaction between the template molecules and zeolite framework preserves the local structures associated with the original topology at high pressure and, on releasing the pressure, the template redirects the silicate species to partially reform the initial topology. For the as‐made framework of MIL‐68(In), the DMF solvent molecules may play a similar role to that of template molecules in ZSM‐5.…”

Section: Discussionmentioning

confidence: 99%

“…Chem. Eur.J.2015, 21,[18739][18740][18741][18742][18743][18744][18745][18746][18747][18748] www.chemeurj.org and the framework. The appearance of this mode strongly suggests host-guest interaction at the specific site of the organic linker.M olecular mechanics simulations providedm ore detailed information (see below).…”

Section: Ir Spectra Of Activated Mil-68(in) Loaded With Co 2 On Comprmentioning

confidence: 99%

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Probing the Structural Stability of and Enhanced CO₂ Storage in MOF MIL‐68(In) under High Pressures by FTIR Spectroscopy

Lin

et al. 2015

Chemistry A European J

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The unique structural topology of metal-organic framework (MOF) MIL-68, featuring two types of channels with distinct pore sizes, makes it a promising candidate for application in gas storage and separation. In this study, the behavior of as-made and activated MIL-68(In) was investigated in a diamond-anvil cell under high pressure by in situ IR spectroscopy. The framework exhibits high stability under compression up to 9 GPa, whereas the bridging OH groups appear to be very sensitive to compression. Pressure-induced structural modifications were found to be completely reversible for as-made MIL-68(In) but irreversible for the activated framework. Moreover, the addition of Nujol as pressure-transmitting medium makes the framework more resilient to pressure. Finally, when loaded with CO2, the framework exhibited interesting differential binding affinities with CO2 in the hexagonal and triangular pores at different pressures. The pressure-enhanced CO2 storage behavior and the guest-host interaction mechanism between CO2 and the MOF framework were explored with the aid of Monte Carlo simulations. These studies demonstrated great potential for MIL-68(In) in gas-storage applications that require extreme loading pressures.

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“…The importance of the incorporated molecules on PIA is also discussed by Fu et al (2012), who studied the PIA process of as-made (with template molecules occluded in the zeolite) and calcined Si-pure ZSM-5 by in situ Raman spectroscopy and X-ray diffraction, without PTM. These authors demonstrated that, although both phases undergo PIA, their amorphization threshold pressures are different.…”

Section: Pressure-induced Amorphizationmentioning

confidence: 99%

High-pressure-induced structural changes, amorphization and molecule penetration in MFI microporous materials: a review

Vezzalini

Arletti

Quartieri

2014

Acta Crystallogr Sect B

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Author(s) of this paper may load this reprint on their own web site or institutional repository provided that this cover page is retained. Republication of this article or its storage in electronic databases other than as specified above is not permitted without prior permission in writing from the IUCr.For further information see http://journals.iucr.org/services/authorrights.html Acta Crystallographica Section B: Structural Science, Crystal Engineering and Materials publishes scientific articles related to the structural science of compounds and materials in the widest sense. Knowledge of the arrangements of atoms, including their temporal variations and dependencies on temperature and pressure, is often the key to understanding physical and chemical phenomena and is crucial for the design of new materials and supramolecular devices. Acta Crystallographica B is the forum for the publication of such contributions. Scientific developments based on experimental studies as well as those based on theoretical approaches, including crystal-structure prediction, structureproperty relations and the use of databases of crystal structures, are published.

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An Investigation of the Behavior of Completely Siliceous Zeolite ZSM-5 under High External Pressures

Cited by 20 publications

References 56 publications

Effect of H2O on the Pressure-Induced Amorphization of Hydrated AlPO4-17

Effect of H2O on the Pressure-Induced Amorphization of Hydrated AlPO4-17

Probing the Structural Stability of and Enhanced CO₂ Storage in MOF MIL‐68(In) under High Pressures by FTIR Spectroscopy

High-pressure-induced structural changes, amorphization and molecule penetration in MFI microporous materials: a review

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An Investigation of the Behavior of Completely Siliceous Zeolite ZSM-5 under High External Pressures

Cited by 20 publications

References 56 publications

Effect of H2O on the Pressure-Induced Amorphization of Hydrated AlPO4-17

Effect of H2O on the Pressure-Induced Amorphization of Hydrated AlPO4-17

Probing the Structural Stability of and Enhanced CO2 Storage in MOF MIL‐68(In) under High Pressures by FTIR Spectroscopy

High-pressure-induced structural changes, amorphization and molecule penetration in MFI microporous materials: a review

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Probing the Structural Stability of and Enhanced CO₂ Storage in MOF MIL‐68(In) under High Pressures by FTIR Spectroscopy