Surfactant-mediated and wet-impregnation approaches for modification of ZIF-8 nanocrystals: Mixed matrix membranes for CO2/CH4 separation

Asadi, Erfan; Ghadimi, Ali; Hosseini, Seyed Saeid; Sadatnia, Behrouz; Rostamizadeh, Mohammad; Nadeali, Atefeh

doi:10.1016/j.micromeso.2021.111539

Cited by 12 publications

(7 citation statements)

References 93 publications

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“…The guests compounds can be adsorbed onto the external surface of ZIF crystals and then penetrate into the pores. The connection between guest compounds and the ZIF framework is impacted due to variables such as surface chemical composition, pore dimensions, and guest-host connections [39]. The impregnation method enhances the productivity of ZIF for different uses.…”

Section: Impregnation Compositionmentioning

confidence: 99%

A Mini Overview of Post Synthetic Modification of Synthesized Zeolitic Imidazolate Frameworks

Kristi Priya Choudhury,

Neogi,

Tahzib Ibrahim Protik

et al. 2023

Proceedings of International Exchange and Innovation Conference on Engineering &Amp; Sciences (IEICES)

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The inorganic metal node and organic linker may be chemically transformed to optimize metal-organic frameworks (MOFs) for various uses. The term zeolitic imidazolate framework (ZIF) refers to MOFs that are topologically isomorphic with zeolites. These can be synthesized in several ways such as hydrothermal, sol gel, solvothermal etc. After the fabrication these can be modified with post synthetic modification (PSM) processes. The idea for PSM was developed in this century. PSM is a procedure that may be used to modify MOFs while still preserving the structural integrity of the framework. PSM makes it possible to functionalize both the metallic and organic components of MOFs. PSM acts as a technique for phase separation, increasing catalytic activity, increased surface area for surface reactions, and improvement of other properties. The purpose of this article is to give a mini overview of the various PSM approaches used for ZIF modification.

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Section: Impregnation Compositionmentioning

confidence: 99%

A Mini Overview of Post Synthetic Modification of Synthesized Zeolitic Imidazolate Frameworks

Kristi Priya Choudhury,

Neogi,

Tahzib Ibrahim Protik

et al. 2023

Proceedings of International Exchange and Innovation Conference on Engineering &Amp; Sciences (IEICES)

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“…THAM has a slightly higher p K a (8.07) than that of 2-mIm (7.86) and 1-mIm (7.06), and we reckon it will be a great comparison between THAM and 1-mIm on ZIF-8 formation since the p K a of 2-mIm is in between these two compounds. CTAB is a cationic surfactant that has been used to study its effect on the shape of ZIF-8. ,, Pan et al reported that CTAB preferentially adsorbs on the [100] facets of ZIF-8 in aqueous synthesis conditions . On a follow-up work, Pan’s lab generated a morphological map of ZIF-8 based on CTAB concentrations in aqueous conditions .…”

Section: Introductionmentioning

confidence: 99%

“…CTAB is a cationic surfactant that has been used to study its effect on the shape of ZIF-8. 32 , 36 , 39 Pan et al reported that CTAB preferentially adsorbs on the [100] facets of ZIF-8 in aqueous synthesis conditions. 33 On a follow-up work, Pan’s lab generated a morphological map of ZIF-8 based on CTAB concentrations in aqueous conditions.…”

Section: Introductionmentioning

confidence: 99%

Zeta Potential and Size Analysis of Zeolitic Imidazolate Framework-8 Nanocrystals Prepared by Surfactant-Assisted Synthesis

Jongert,

Slowinski,

Dao

et al. 2024

Langmuir

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The crystal nucleation and growth mechanism of monodispersed metal−organic framework nanoparticles were studied using time-resolved light dynamic, electrokinetic, and powder X-ray diffraction methods. We confirmed that zeolitic imidazolate framework-8 (ZIF-8) nanocrystals follow a nonclassical crystal growth pathway, where a fast nucleation occurs with dense liquid clusters or nanocrystals forming spontaneously when two precursors are mixed. We also explored the zeta potential and solvodynamic size changes of ZIF-8 prepared by a surfactantassisted synthesis. Three modulators, including 1-methylimidazole (1-mIm), tris(hydroxymethyl)aminomethane (THAM), and (1hexadecyl)trimethylammonium bromide (CTAB), were studied. We found that 1-mIm dramatically increases the rate of nucleation of ZIF-8. With an increasing amount of 1-mIm, which functions as a coordination modulator, the size increases, and the zeta potential of ZIF-8 decreases. Whereas THAM, as both a coordination and a deprotonation modulator, increases the size and zeta potential of ZIF-8 simultaneously, CTAB, as a long alkyl cationic surfactant, mainly adsorbs on the surface of ZIF-8, and the zeta potential of the formed ZIF-8 is controlled by the amount of CTAB in solution compared with its critical micelle concentration. Overall, we reveal that the modulator type and concentration can be used to control the size and zeta potential of the dispersed ZIF-8 nanocrystals in a colloid system. The experiments also enable identification of the nucleation and crystal growth processes of ZIF-8. The findings will be applicable to other nanocrystals in colloid systems, which are used for heterogeneous catalysis and guest molecular loadings.

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“…Among the mentioned materials, MOFs are a desirable and new generation of materials that have caught the attention of many scientists in the last two decades. MOFs have very large specific areas, high porosity, adjustable chemical capabilities, and they provide a brilliant future in this area. − According to their unique properties, MOFs have been developed and applied on different scales and applications, such as CO 2 capture from CO 2 /H 2 , CO 2 /N 2 , and natural gas purification (CO 2 /CH 4 ) . MOF materials in gas adsorption and separation are still under development.…”

Section: Introductionmentioning

confidence: 99%

“…16−21 According to their unique properties, MOFs have been developed and applied on different scales and applications, such as CO 2 capture from CO 2 /H 2 , 22 CO 2 /N 2 , 23 and natural gas purification (CO 2 /CH 4 ). 24 MOF materials in gas adsorption and separation are still under development. In a recent report, a zinc-based MOF called CALF-20 was presented with high adsorption and selectivity for CO 2 : 25 the space-time yield of precipitation for the new MOF is outstandingly much more than those for zeolites.…”

Section: Introductionmentioning

confidence: 99%

Recent Advances in Adsorption and Separation of Methane and Carbon Dioxide Greenhouse Gases Using Metal–Organic Framework-Based Composites

Roohollahi

Zeinalzadeh

Kazemian

2022

Ind. Eng. Chem. Res.

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The development of materials and methods efficient for carbon capturing, methane storage, and selective separation of CO 2 and CH 4 from gas mixtures is a crucial approach to addressing the problems of these two greenhouse gases. In this regard, metal organic framework (MOF)-based composite materials are recognized as a promising class of materials, which could combine the advantages of MOFs and the other constituents to reduce their current drawbacks in the adsorption/separation systems. In this context, a series of MOF composites recently developed for CO 2 and CH 4 adsorption and their selective separation from gas mixtures are presented and discussed: MOF/carbon-based materials, MOF/Si-based composites, MOF mixed-matrix membranes, MOF/MOF, and MOF/metal oxide structures. Here, with an emphasis on the most recent signs of progress, we hope to shed a light on the MOF composites and assist future research to promote the performance of current composites and develop new MOF hybrid structures considering the proposed challenges.

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Surfactant-mediated and wet-impregnation approaches for modification of ZIF-8 nanocrystals: Mixed matrix membranes for CO2/CH4 separation

Cited by 12 publications

References 93 publications

A Mini Overview of Post Synthetic Modification of Synthesized Zeolitic Imidazolate Frameworks

A Mini Overview of Post Synthetic Modification of Synthesized Zeolitic Imidazolate Frameworks

Zeta Potential and Size Analysis of Zeolitic Imidazolate Framework-8 Nanocrystals Prepared by Surfactant-Assisted Synthesis

Recent Advances in Adsorption and Separation of Methane and Carbon Dioxide Greenhouse Gases Using Metal–Organic Framework-Based Composites

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