Journal Article10.1126/SCIENCE.1152516
High-throughput synthesis of zeolitic imidazolate frameworks and application to CO2 capture.
Rahul Banerjee,Anh Phan,Bo Wang,Carolyn B. Knobler,Hiroyasu Furukawa,Michael O'Keeffe,Omar M. Yaghi +6 more
TL;DR: Members of a selection of zeolitic imidazolate frameworks have high thermal stability and chemical stability in refluxing organic and aqueous media, and they exhibit unusual selectivity for CO2 capture from CO2/CO mixtures and extraordinary capacity for storing CO2.
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Abstract: A high-throughput protocol was developed for the synthesis of zeolitic imidazolate frameworks (ZIFs). Twenty-five different ZIF crystals were synthesized from only 9600 microreactions of either zinc(II)/cobalt(II) and imidazolate/imidazolate-type linkers. All of the ZIF structures have tetrahedral frameworks: 10 of which have two different links (heterolinks), 16 of which are previously unobserved compositions and structures, and 5 of which have topologies as yet unobserved in zeolites. Members of a selection of these ZIFs (termed ZIF-68, ZIF-69, and ZIF-70) have high thermal stability (up to 390°C) and chemical stability in refluxing organic and aqueous media. Their frameworks have high porosity (with surface areas up to 1970 square meters per gram), and they exhibit unusual selectivity for CO 2 capture from CO 2 /CO mixtures and extraordinary capacity for storing CO 2 : 1 liter of ZIF-69 can hold ∼83 liters of CO 2 at 273 kelvin under ambient pressure.
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Citations
Adsorption mechanism on metal organic frameworks of Cu-BTC, Fe-BTC and ZIF-8 for CO2 capture investigated by X-ray absorption fine structure
TL;DR: In this article, three commercial metal-organic frameworks (MOFs) of Cu-BTC, Fe-BTC and ZIF-8 have been characterized by multiple techniques including CO2 adsorption/desorption, scanning electron microscopy (SEM), TEM, X-ray diffraction (XRD) and Xray absorption fine structure (XAFS) to identify the short-range structural evolutions on investigated metals (Cu, Fe, Zn).
64
PDMS membranes containing ZIF-coated mesoporous silica spheres for efficient ethanol recovery via pervaporation
Parimal V. Naik,Lik Hong Wee,Maria Meledina,Stuart Turner,Yanbo Li,Gustaaf Van Tendeloo,Johan A. Martens,Ivo F.J. Vankelecom +7 more
TL;DR: In this article, the mesoporous silica core allows very fast flow of the permeating compound, while the hydrophobic ZIF coating enhances the ethanol selectivity through its specific pore structure, hydrophobicity and surface chemistry.
Tuning the separation properties of zeolitic imidazolate framework core–shell structures via post-synthetic modification
Javier Sánchez-Laínez,Adrián Veiga,Beatriz Zornoza,Salvador R. G. Balestra,Said Hamad,A. Rabdel Ruiz-Salvador,Sofia Calero,Carlos Téllez,Joaquín Coronas +8 more
TL;DR: In this article, the conversion of ZIF-8 into ZIF7 via post-synthetic modification with benzimidazole has been monitored by quantifying the liberated 2-methylimidazoles by chromatography.
Adsorption and diffusion of carbon dioxide on ZIF-68
TL;DR: In this paper, the authors used the Grand Canonical Monte Carlo (GCMC) calculations to understand the CO 2 adsorption sites on ZIF-68 and found a new site between the faces of two converse nIM linkers.
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Hierarchical Nanostructures of Metal-Organic Frameworks Applied in Gas Separating ZIF-8-on-ZIF-67 Membranes
Alexander Knebel,Paul Wulfert-Holzmann,Sebastian Friebe,Janet Pavel,Ina Strauß,Alexander Mundstock,Frank Steinbach,Jürgen Caro +7 more
TL;DR: The system ZIF-8@ZIF-67 shows a nearly doubled H2 /CO2 separation factor, regardless of whether neat membrane or mixed-matrix-membrane in comparison to other MOF materials.
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References
Exceptional chemical and thermal stability of zeolitic imidazolate frameworks
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High-throughput synthesis and catalytic properties of a molecular sieve with 18- and 10-member rings
TL;DR: The structure and catalytic activity of the silicogermanate zeolite ITQ-33 is reported, which exhibits straight large pore channels with circular openings of 18-rings along the c axis interconnected by a bidirectional system of 10-ring channels, yielding a structure with very large micropore volume.
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