Unprecedented High Temperature CO2 Selectivity and Effective Chemical Fixation by a Copper-Based Undulated Metal-Organic Framework

ACS Applied Materials & Interfaces
Prasenjit Das, Sanjay K Mandal

Abstract

Post- and pre-combustion CO2 capture and separation are the vital challenges from industrial viewpoint as the accessible technologies are not cost-effective and cumbersome. Thus, development of functional metal-organic frameworks (MOFs) that are found to be promising materials for selective CO2 capture, separation and conversion is gaining an importance in the scientific world. Based on the strategic design, a new functionalized triazine-based undulated paddle-wheel Cu-MOF (1), {[Cu(MTABA)(H2O)].4H2O.2EtOH.DMF}n (where, H2MTABA = 4,4'-((6-methoxy-1,3,5-triazine-2,4-diyl)bis(azanediyl))dibenzoic acid), has been synthesized under solvothermal conditions and fully characterized. MOF 1 contains a 1D channel along a-axis with pore walls decorated with open metal sites, and multi-functional groups (amine, triazine and methoxy). Unlike other porous materials, activated 1 (1') possesses exceptional increment in CO2/N2 and CO2/CH4 selectivity with increased temperature calculated by ideal adsorbed solution theory (IAST). With an increase in temperature from 298 to 313 K, the selectivity of CO2 rises from 350.3 to 909.5 at zero coverage, which is unprecedented till date. Moreover, 1' behaves as a bifunctional heterogeneous catalyst throu...Continue Reading

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