A porous cobalt-based MOF with high CO<sub>2</sub> selectivity and uptake capacity

Du, Liting; Lu, Zhiyong; Ma, Mengtao; Su, Fan; Xu, Li

doi:10.1039/c5ra02756j

Cited by 7 publications

(3 citation statements)

References 52 publications

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“…For example, the adsorption selectivity at 100 kPa and 298 K follows the order py‐MOF‐74c (471) > py‐MOF‐74b (147) > py‐MOF‐74a (87) > MOF‐74 (49). In brief, the competitive adsorption potential of py‐MOF‐74c for CO 2 over N 2 is greatly superior to previously reported MOFs under similar conditions, such as NJFU‐2a (195), 40 Zn(imPim) (106), 30 and BTU‐11 (43) 41 . These results indicate that py‐MOF‐74 displays exceptionally selectivity for CO 2 adsorption, which makes it a good candidate for MOF membrane materials and nanofillers of mixed matrix membranes that are employed in dynamic CO 2 separation.…”

Section: Resultsmentioning

confidence: 60%

Pyrazine‐interior‐embodied MOF‐74 for selective CO₂ adsorption

et al. 2021

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A series of pyrazine-interior-embodied metal-organic framework-74 composites (py-MOF-74) were successfully synthesized by a post-synthetic vapor modification method. Here, pyrazine molecules occupy the cavity to block the wide pores of MOF-74, which accentuates the difference in adsorption of a pair of gases on MOFs and consequently reinforces the adsorption selectivity. Different from the "physical confinement" of occupants, the pyrazine molecule with dual "para-nitrogen" atoms donates one N atom to bond with the open metal ion of MOF-74 for stability and the other N atom for potential CO 2 trapping. Typically, py-MOF-74c with the highest pyrazine insertion ratio displays selectivity greatly superior to that of MOF-74 in equimolar CO 2 /CH 4 (598 vs. 35) and in simulated CO 2 /N 2 flue gas (471 vs. 49). Py-MOF-74 entities are long-lived adsorbents, and their CO 2 capacity can be maintained even after storage for 1 year in air. Py-MOF-74 also showed a sharp molecular sieve property in fixed-bed cycle adsorption tests, which implies its great potential in real applications.

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Section: Resultsmentioning

confidence: 60%

Pyrazine‐interior‐embodied MOF‐74 for selective CO₂ adsorption

et al. 2021

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“…For example, the adsorption selectivity at 100 kPa and 298 K follows the order of py-MOF-74c (471) > py-MOF-74b (147) > py-MOF-74a (87) > MOF-74 (49). In brief, the competitive adsorption potential of py-MOF-74c for CO 2 over N 2 is greatly superior to previously reported MOFs at analogous conditions, such as NJFU-2a (195) 31 , Zn(imPim) (106) 32 and BTU-11 (43) 33 .…”

Section: Gas Adsorption Experimentsmentioning

confidence: 59%

Pyrazine-interior-embodied MOF-74 for selective CO2 adsorption

Zhao

Ban

Chang

et al. 2021

Preprint

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A series of pyrazine-interior-embodied MOF-74 composites (py-MOF-74) were successfully synthesized by a post vapor modification method, concomitant with the loading ratio of pyrazine easily controlled in this process. Here, pyrazine molecules perform as a cavity-occupant to block the wide pores of MOF-74, which accentuates the adsorption discrepancy of a pair of gases on MOFs and consequently reinforces the adsorption selectivity (typically for CO/N, CO/CH). Different from the “physical confinement” of occupants, pyrazine molecule with dual “para-nitrogen” atoms donates one N atom to bond with the open metal ion of MOF-74 for stability, and remains the other N atom available for potential CO trapping site. Pyrazine-interior-embodied MOF-74 composites manifest significantly improved CO/N and CO/CH adsorption selectivity. Typically, py-MOF-74c with ultimate pyrazine insertion displays selectivity greatly superior to MOF-74 in the equimolar CO/CH (598 vs. 35) and the simulated CO/N flue gas (471 vs. 49) at 100 kPa and 298 K.

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“…The construction of MOFs composed of cobalt carboxylate SBUs is difficult to predict as the coordination number and arrangement of cobalt(II) can range from four (tetrahedral) to six (octahedral). For example, cobalt exhibits tetrahedral coordination in the Co‐MOF‐5‐analog, square‐pyramidal coordination in paddle‐wheel based MOFs, chains of corner‐sharing CoO 6 octahedra in Co‐MOF‐71 and clusters of higher nuclearity …”

Section: Introductionmentioning

confidence: 99%

Two‐dimensional Cobalt‐Carboxylate Framework with Hourglass Trinuclear Co₃(COO)₆(DMA)₃ Secondary Building Unit

Goldman

Nardin

Höfert

et al. 2018

Zeitschrift anorg allge chemie

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The two‐dimensional (2D) cobalt‐carboxylate framework of the hxl type with the formula [Co3(bdc)3(DMA)3]·DMA was synthesized in a mixture of the ionic liquid 1‐butyl‐3‐methylimidazolium tetrafluoroborate [BMIm][BF4], HBF4 and N,N‐dimethylacetamide (DMA) via solvothermal reaction. The structure of [Co3(bdc)3(DMA)3]·DMA (bdc2– = benzene‐1,4‐dicarboxylate) consists of an hourglass trinuclear secondary building unit (SBU) with the first octahedral (oct)‐octahedral and square‐pyramidal (sq‐pyr) coordinated cobalt atoms in the sequence Cooct–Cooct–Cosq‐pyr with terminally coordinated DMA molecules. These SBUs are bridged by six bdc2– ligands into a two‐dimensional layered structure.

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A porous cobalt-based MOF with high CO₂ selectivity and uptake capacity

Abstract: A porous cobalt-based metal–organic framework [CoL2−]n has been designed by self-assembling [Co2(COO)4] paddlewheel SBUs and a novel trigonal hetero–functional ligand. [CoL2−]n exhibits large CO2 uptake and selectivity.

Cited by 7 publications

References 52 publications

Pyrazine‐interior‐embodied MOF‐74 for selective CO₂ adsorption

Pyrazine‐interior‐embodied MOF‐74 for selective CO₂ adsorption

Pyrazine-interior-embodied MOF-74 for selective CO2 adsorption

Two‐dimensional Cobalt‐Carboxylate Framework with Hourglass Trinuclear Co₃(COO)₆(DMA)₃ Secondary Building Unit

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A porous cobalt-based MOF with high CO2 selectivity and uptake capacity

Abstract: A porous cobalt-based metal–organic framework [CoL2−]n has been designed by self-assembling [Co2(COO)4] paddlewheel SBUs and a novel trigonal hetero–functional ligand. [CoL2−]n exhibits large CO2 uptake and selectivity.

Cited by 7 publications

References 52 publications

Pyrazine‐interior‐embodied MOF‐74 for selective CO2 adsorption

Pyrazine‐interior‐embodied MOF‐74 for selective CO2 adsorption

Pyrazine-interior-embodied MOF-74 for selective CO2 adsorption

Two‐dimensional Cobalt‐Carboxylate Framework with Hourglass Trinuclear Co3(COO)6(DMA)3 Secondary Building Unit

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A porous cobalt-based MOF with high CO₂ selectivity and uptake capacity

Pyrazine‐interior‐embodied MOF‐74 for selective CO₂ adsorption

Pyrazine‐interior‐embodied MOF‐74 for selective CO₂ adsorption

Two‐dimensional Cobalt‐Carboxylate Framework with Hourglass Trinuclear Co₃(COO)₆(DMA)₃ Secondary Building Unit