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A partially interpenetrated metal-organic framework for selective hysteretic sorption of carbon dioxide

DOI: 10.1038/nmat3343 DOI Help

Authors: Sihai Yang (University of Nottingham) , Xiang Lin (University of Nottingham) , William Lewis (University of Nottingham) , Mikhail Suyetin (University of Nottingham) , Elena Bichoutskaia (University of Nottingham) , Julia Parker (Diamond Light Source) , Chiu Tang (Diamond Light Source) , Dave Allan (Diamond Light Source) , Pierre J. Rizkallah (University of Cardiff) , Peter Hubberstey (University of Nottingham) , Neil R. Champness (University of Nottingham) , K. Mark Thomas (University of Newcastle upon Tyne) , Martin Schröder (University of Nottingham) , Alexander J. Blake (University of Nottingham)
Co-authored by industrial partner: No

Type: Journal Paper
Journal: Nature Materials

State: Published (Approved)
Published: June 2012
Diamond Proposal Number(s): 6410

Abstract: The selective capture of carbon dioxide in porous materials has potential for the storage and purification of fuel and flue gases. However, adsorption capacities under dynamic conditions are often insufficient for practical applications, and strategies to enhance CO2–host selectivity are required. The unique partially interpenetrated metal–organic framework NOTT-202 represents a new class of dynamic material that undergoes pronounced framework phase transition on desolvation. We report temperature-dependent adsorption/desorption hysteresis in desolvated NOTT-202a that responds selectively to CO2. The CO2 isotherm shows three steps in the adsorption profile at 195 K, and stepwise filling of pores generated within the observed partially interpenetrated structure has been modelled by grand canonical Monte Carlo simulations. Adsorption of N2, CH4, O2, Ar and H2 exhibits reversible isotherms without hysteresis under the same conditions, and this allows capture of gases at high pressure, but selectively leaves CO2 trapped in the nanopores at low pressure.

Journal Keywords: Metal–organic frameworks; Porous materials

Subject Areas: Chemistry, Energy, Materials

Instruments: I11-High Resolution Powder Diffraction , I19-Small Molecule Single Crystal Diffraction

Other Facilities: Station 9.8 of the Daresbury Synchrotron Radiation Source

Added On: 10/04/2012 10:58

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