Reversible adsorption of nitrogen dioxide within a robust porous metal–organic framework
- Univ. of Manchester (United Kingdom). School of Chemistry
- Univ. of Nottingham (United Kingdom). School of Chemistry
- Oak Ridge National Lab. (ORNL), Oak Ridge, TN (United States). Chemical and Engineering Materials Division (CEMD), Neutron Sciences Directorate
- Univ. of Manchester (United Kingdom). School of Chemistry; Novosibirsk State Univ. (Russian Federation). International Tomography Center SB RAS
- Peking Univ., Beijing (China). College of Chemistry and Molecular Engineering
- European Synchrotron Radiation Facility (ESRF), Grenoble (France)
- Univ. of Nottingham (United Kingdom). School of Chemistry; Univ. of Nottingham Ningbo China, Ningbo (China). Dept. of Chemical and Environmental Engineering
- Univ. of Newcastle upon Tyne, Newcastle upon Tyne (United Kingdom)
Nitrogen dioxide (NO2) is a major air pollutant causing significant environmental and health problems. We report reversible adsorption of NO2 in a robust metal–organic framework. Under ambient conditions, MFM-300(Al) exhibits a reversible NO2 isotherm uptake of 14.1 mmol g-1, and, more importantly, exceptional selective removal of low-concentration NO2 (5,000 to <1 ppm) from gas mixtures. Complementary experiments reveal five types of supramolecular interaction that cooperatively bind both NO2 and N2O4 molecules within MFM-300(Al). We find that the in situ equilibrium 2NO2 ↔ N2O4 within the pores is pressure-independent, whereas ex situ this equilibrium is an exemplary pressure-dependent first-order process. The coexistence of helical monomer–dimer chains of NO2 in MFM-300(Al) could provide a foundation for the fundamental understanding of the chemical properties of guest molecules within porous hosts. Lastly, this work may pave the way for the development of future capture and conversion technologies.
- Research Organization:
- Oak Ridge National Laboratory (ORNL), Oak Ridge, TN (United States)
- Sponsoring Organization:
- USDOE Laboratory Directed Research and Development (LDRD) Program; Engineering and Physical Sciences Research Council (EPSRC); Univ. of Manchester; Univ. of Nottingham; Russian Ministry of Science and Education
- Grant/Contract Number:
- AC05-00OR22725
- OSTI ID:
- 1474849
- Journal Information:
- Nature Materials, Vol. 17, Issue 8; ISSN 1476-1122
- Publisher:
- Springer Nature - Nature Publishing GroupCopyright Statement
- Country of Publication:
- United States
- Language:
- English
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