Water-Stable etb-MOFs for Methane and Carbon Dioxide Storage

Constantinos Tsangarakis, Ali Azmy, Christos Tampaxis, Nourdine Zibouche, Emmanuel Klontzas, Emmanuel Tylianakis, George E. Froudakis, Theodore Steriotis, Ioannis Spanopoulos, Pantelis N. Trikalitis

Research output: Contribution to journalArticlepeer-review

2 Citations (SciVal)

Abstract

We utilized the etb platform of MOFs for the synthesis of two new water-stable compounds based on amide functionalized trigonal tritopic organic linkers H3BTBTB (L1), H3BTCTB (L2) and Al3+ metal ions, namely, Al(L1) and Al(L2). The mesoporous Al(L1) material exhibits an impressive methane (CH4) uptake at high pressures and ambient temperature. The corresponding values of 192 cm3 (STP) cm-3, 0.254 g g-1 at 100 bar, and 298 K are among the highest reported for mesoporous MOFs, while the gravimetric and volumetric working capacities (between 80 bar and 5 bar) can be well compared to the best MOFs for CH4 storage. Furthermore, at 298 K and 50 bar, Al(L1) adsorbs 50 wt % (304 cm3 (STP) cm-3) CO2, values among the best recorded for CO2 storage using porous materials. To gain insight into the mechanism accounting for the resultant enhanced CH4 storage capacity, theoretical calculations were performed, revealing the presence of strong CH4 adsorption sites near the amide groups. Our work demonstrates that amide functionalized mesoporous etb-MOFs can be valuable for the design of versatile coordination compounds with CH4 and CO2 storage capacities comparable to ultra-high surface area microporous MOFs.

Original languageEnglish
Pages (from-to)5496-5504
Number of pages9
JournalInorganic Chemistry
Volume62
Issue number14
Early online date28 Mar 2023
DOIs
Publication statusPublished - 10 Apr 2023

Bibliographical note

Funding Information:
I.S. acknowledges financial support from ACS-PRF (65721-DNI5), acknowledgment is made to the donors of the American Chemical Society Petroleum Research Fund for support of this research. P.N.T. acknowledges the co-financial support by the European Regional Development Fund of the European Union and Greek national funds through the Operational Program Competitiveness, Entrepreneurship and Innovation, under the call RESEARCH─CREATE─INNOVATE (project code: T1EDK-00770). This work used the Isambard 2 UK National Tier-2 HPC Service operated by GW4 and the UK Met Office, and funded by EPSRC (EP/T022078/1).

ASJC Scopus subject areas

  • Physical and Theoretical Chemistry
  • Inorganic Chemistry

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