Effect of methylation of ionic liquids on the gas separation performance of ionic liquid/metal–organic framework composites

Nozari, Vahid; Zeeshan, Muhammad; Keskın, Seda; Uzun, Alper

doi:10.1039/c8ce01364k

Cited by 32 publications

(22 citation statements)

References 32 publications

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“…To elucidate the effect of IL incorporation on MOFs with different properties, we compared the gas‐separation performances of the [BMIM][BF 4 ]/MIL‐53(Al) and [BMIM][PF 6 ]/MIL‐53(Al) composites with those of previously reported composites [BMIM][BF 4 ]/CuBTC, [BMIM][PF 6 ]/CuBTC, [BMIM][BF 4 ]/ZIF‐8, and [BMIM][PF 6 ]/ZIF‐8 (all of these composites had comparable near‐saturation IL loadings) . The ideal CO 2 /CH 4 and CO 2 /N 2 selectivities of [BMIM][BF 4 ]‐ and [BMIM][PF 6 ]‐incorporated CuBTC, ZIF‐8, and MIL‐53(Al) are shown as a function of pressure in the Supporting Information, Figure S10. As shown in Figure a, b, the incorporation of [BMIM][BF 4 ] and [BMIM][PF 6 ] into CuBTC decreased the CO 2 /CH 4 selectivity of the MOF, which was attributed to the open metal sites in CuBTC .…”

Section: Resultsmentioning

confidence: 99%

“… Plots of the normalized CO 2 /CH 4 and CO 2 /N 2 selectivities of the [BMIM][BF 4 ]‐ (a, c) and [BMIM][PF 6 ]‐incorporated MIL‐53(Al) composites (b, d), as well as CuBTC and ZIF‐8, as a function of pressure.…”

Section: Resultsmentioning

confidence: 99%

“…For example, we investigated the incorporation of 1‐ n ‐butyl‐3‐methylimidazolium tetrafluoroborate ([BMIM][BF 4 ]) into copper benzene‐1,3,5‐tricarboxylate (CuBTC; also known as HKUST‐1, Hong Kong University of Science and Technology), and reported an increase in the selectivity of the MOF for CH 4 over CO 2 , N 2 , and H 2 . Two ILs, 1‐ n ‐butyl‐3‐methylimidazolium hexafluorophosphate ([BMIM][PF 6 ]) and 1‐ n ‐butyl‐2,3‐dimethylimidazolium hexafluorophosphate ([BMMIM][PF 6 ]), were also incorporated into CuBTC, and the selectivity of the MOF for both CO 2 /N 2 and CH 4 /N 2 was shown to be improved . Furthermore, the incorporation of [BMIM][BF 4 ], [BMIM][PF 6 ], and 1‐ n ‐butyl‐3‐methylimidazolium thiocyanate ([BMIM][SCN]) into zinc 2‐methylimidazolate (ZIF‐8; ZIF stands for zeolitic imidazolate framework) led to enhanced CO 2 selectivity over CH 4 and N 2 .…”

Section: Introductionmentioning

confidence: 99%

“…Then, we analyzed the CO 2 , CH 4 , and N 2 adsorption performance of these composites to assess their CO 2 /CH 4 and CO 2 /N 2 selectivities. We also compared the CO 2 /CH 4 and CO 2 /N 2 selectivities of composites of [BMIM][BF 4 ] and [BMIM][PF 6 ] with MIL‐53(Al), CuBTC,, and ZIF‐8 to understand the effect of the physical and chemical properties of ILs and MOFs on their gas‐separation performance. Furthermore, we also provided a comprehensive comparison of the CO 2 /CH 4 and CO 2 /N 2 selectivities of IL/MIL‐53(Al) composites with some pristine MOFs.…”

Section: Introductionmentioning

confidence: 99%

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MIL‐53(Al) as a Versatile Platform for Ionic‐Liquid/MOF Composites to Enhance CO₂ Selectivity over CH₄ and N₂

Kavak

Polat

Kulak

et al. 2019

Chemistry An Asian Journal

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Five different imidazolium-based ionic liquids (ILs) were incorporated into am etal-organic framework (MOF), MIL-53(Al),t oi nvestigate the effect of IL incorporation on the CO 2 separation performance of MIL-53(Al). CO 2 ,C H 4 ,a nd N 2 adsorption isothermso ft he IL/MIL-53(Al) composites and pristine MIL-53(Al)w ere measured to evaluatet he effect of the ILs on the CO 2 /CH 4 and CO 2 /N 2 selectivities of the MOF. Of the composite materials that were tested,[ BMIM][PF 6 ]/ MIL-53(Al) exhibited the largesti ncreasei nC O 2 /CH 4 selectivity,2 .8-times higher than that of pristine MIL-53(Al), whilst [BMIM][MeSO 4 ]/MIL-53(Al) exhibited the largest increase in CO 2 /N 2 selectivity,3 .3-times highert han that of pristine . Ac omparison of the CO 2 separation potentials of the IL/MOF composites showed that the [BMIM][BF 4 ]-and [BMIM][PF 6 ]-incorporated MIL-53(Al) composites both showed enhanced CO 2 /N 2 and CO 2 /CH 4 selectivities at pressures of 1-5 bar compared to composites of CuBTC and ZIF-8w ith the same ILs. These results demonstrate that MIL-53(Al) is av ersatile platform for IL/MOF composites and could help to guide the rational design of new composites for target gas-separation applications.

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Section: Resultsmentioning

confidence: 99%

Section: Resultsmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

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MIL‐53(Al) as a Versatile Platform for Ionic‐Liquid/MOF Composites to Enhance CO₂ Selectivity over CH₄ and N₂

Kavak

Polat

Kulak

et al. 2019

Chemistry An Asian Journal

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“…To fit the BET equation, pressure steps in the range of 0.08 and 0.25 bar were applied. [ 33 ] The N 2 adsorption isotherms of the samples at 77 K are shown in Figure S5 (Supporting Information).…”

Section: Methodsmentioning

confidence: 99%

3D Printing of Cytocompatible Gelatin‐Cellulose‐Alginate Blend Hydrogels

Erkoc

Uvak

Nazeer

et al. 2020

Macromolecular Bioscience

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The advancements in 3D printing systems together with medical imaging devices, including magnetic resonance imaging (MRI) and computed tomography (CT), have made it possible to fabricate customized implantable scaffolds from computer-aided designs (CAD), which can precisely fit to the affected region in body of patients. [1,2] Hydrogels are widely preferred scaffold materials for 3D printing since they can mimic the natural tissues due to their high water content, porosity, and flexibility. [1,3] Additionally, they can be easily functionalized with biochemical and biophysical cues, and have easy fabrication processes. [4,5] Deriving therapeutic benefits such as supporting cell adhesion, promoting cell proliferation, and providing mechanical support for the tissue remodeling are desired for hydrogels. Physical, chemical, or biochemical crosslinking of homopolymer or copolymer solutions is typically used to form the hydrogels. [6] Along with synthetic polymers, the natural polymeric hydrogels can provide a stable environment for cells to grow, migrate, proliferate, and/or differentiate. [1] Natural polymers can be extracted from natural products via physical or chemical techniques in order to form hydrogels. The natural polymeric hydrogels, such as gelatin, [7,8] alginate, [9] fibrinogen, [10] hyaluronic acid, [11] cellulose, [12] and chitosan, [13] can dissolve in biofriendly inorganic solvents including phosphate-buffered saline (PBS) and cell culture medium. [6] Besides the well-known biocompatibility and biodegradability of natural polymeric hydrogels, their mechanical characteristics, however, limit potential applications as bioinks for manufacturing of scaffolds through 3D printing process. [14] Collagen-based biomaterials, used in most of the previous studies due to their intrinsic cell-adhesion sites, have been reported to have poor printability and long crosslinking durations. [15] Likewise, sodium alginate, which is a block copolymer of consecutive and alternately arranged β-d-mannuronic acid and α-l-guluronic acid residues, is a broadly preferred material since it is easily crosslinked via ionotropic gelation with divalent cations (e.g., Ca 2+ , Zn 2+). [16] However, alginate hydrogels require additional bioactivation step to trigger cell adhesion. [17] Another 3D bioprinting of hydrogels has gained great attention due to its potential to manufacture intricate and customized scaffolds that provide favored conditions for cell proliferation. Nevertheless, plain natural hydrogels can be easily disintegrated, and their mechanical strengths are usually insufficient for printing process. Hence, composite hydrogels are developed for 3D printing. This study aims to develop a hydrogel ink for extrusion-based 3D printing which is entirely composed of natural polymers, gelatin, alginate, and cellulose. Physicochemical interactions between the components of the intertwined gelatin-cellulose-alginate network are studied via altering copolymer ratios. The structure of the materials and porosity are assessed using infr...

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State of the art of ionic liquid‐modified adsorbents forCO₂capture and separation

Zheng

Zeng

et al. 2021

AIChE Journal

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The enormous emission of carbon dioxide (CO 2 ) from industries has triggered a series of environmental issues. In recent years, ionic liquids (ILs) as novel absorbents are widely used for CO 2 capture owing to their low vapor pressure and tunable structures. IL-modified adsorbents have the advantages of both ILs and porous supports, such as high CO 2 selectivity and high specific surface area, which are novel agents to capture CO 2 with broad application prospects. In this review, more than 140 IL-modified adsorbents for CO 2 capture in recent years were systematically summarized. The types of ILs including conventional ILs and functionalized ILs on CO 2 separation performance of different IL hybrid adsorbents, and their adsorption mechanisms were also discussed. Finally, future perspectives on IL-modified adsorbents for CO 2 separation were further posed.

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Effect of methylation of ionic liquids on the gas separation performance of ionic liquid/metal–organic framework composites

Abstract: [BMIM][PF6] and its methylated form, [BMMIM][PF6] were incorporated into CuBTC to examine the effect of methylation of ionic liquids (ILs) on the gas separation performance of the corresponding IL/metal–organic framework (MOF) composites.

Cited by 32 publications

References 32 publications

MIL‐53(Al) as a Versatile Platform for Ionic‐Liquid/MOF Composites to Enhance CO₂ Selectivity over CH₄ and N₂

MIL‐53(Al) as a Versatile Platform for Ionic‐Liquid/MOF Composites to Enhance CO₂ Selectivity over CH₄ and N₂

3D Printing of Cytocompatible Gelatin‐Cellulose‐Alginate Blend Hydrogels

State of the art of ionic liquid‐modified adsorbents forCO₂capture and separation

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Effect of methylation of ionic liquids on the gas separation performance of ionic liquid/metal–organic framework composites

Abstract: [BMIM][PF6] and its methylated form, [BMMIM][PF6] were incorporated into CuBTC to examine the effect of methylation of ionic liquids (ILs) on the gas separation performance of the corresponding IL/metal–organic framework (MOF) composites.

Cited by 32 publications

References 32 publications

MIL‐53(Al) as a Versatile Platform for Ionic‐Liquid/MOF Composites to Enhance CO2 Selectivity over CH4 and N2

MIL‐53(Al) as a Versatile Platform for Ionic‐Liquid/MOF Composites to Enhance CO2 Selectivity over CH4 and N2

3D Printing of Cytocompatible Gelatin‐Cellulose‐Alginate Blend Hydrogels

State of the art of ionic liquid‐modified adsorbents forCO2capture and separation

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Product

Resources

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MIL‐53(Al) as a Versatile Platform for Ionic‐Liquid/MOF Composites to Enhance CO₂ Selectivity over CH₄ and N₂

MIL‐53(Al) as a Versatile Platform for Ionic‐Liquid/MOF Composites to Enhance CO₂ Selectivity over CH₄ and N₂

State of the art of ionic liquid‐modified adsorbents forCO₂capture and separation