Made-to-order metal-organic frameworks for trace carbon dioxide removal and air capture

Abstract
Direct air capture is regarded as a plausible alternate approach that, if economically practical, can mitigate the increasing carbon dioxide emissions associated with two of the main carbon polluting sources, namely stationary power plants and transportation. Here we show that metal-organic framework crystal chemistry permits the construction of an isostructural metal-organic framework (SIFSIX-3-Cu) based on pyrazine/copper(II) two-dimensional periodic 4 4 square grids pillared by silicon hexafluoride anions and thus allows further contraction of the pore system to 3.5 versus 3.84 for the parent zinc(II) derivative. This enhances the adsorption energetics and subsequently displays carbon dioxide uptake and selectivity at very low partial pressures relevant to air capture and trace carbon dioxide removal. The resultant SIFSIX-3-Cu exhibits uniformly distributed adsorption energetics and offers enhanced carbon dioxide physical adsorption properties, uptake and selectivity in highly diluted gas streams, a performance, to the best of our knowledge, unachievable with other classes of porous materials. 2014 Macmillan Publishers Limited.

Citation
Shekhah O, Belmabkhout Y, Chen Z, Guillerm V, Cairns A, et al. (2014) Made-to-order metal-organic frameworks for trace carbon dioxide removal and air capture. Nature Communications 5. doi:10.1038/ncomms5228.

Publisher
Springer Nature

Journal
Nature Communications

DOI
10.1038/ncomms5228

PubMed ID
24964404

PubMed Central ID
PMC4083436

Relations
Is Supplemented By:

Permanent link to this record