Synthesis and Characterization of 2D Metal-Organic Frameworks for Adsorption of Carbon Dioxide and Hydrogen

Piwai Tshuma; Banothile C E Makhubela; Christophe A Ndamyabera; Susan A Bourne; Gift Mehlana

doi:10.3389/fchem.2020.581226

Synthesis and Characterization of 2D Metal-Organic Frameworks for Adsorption of Carbon Dioxide and Hydrogen

Front Chem. 2020 Nov 5:8:581226. doi: 10.3389/fchem.2020.581226. eCollection 2020.

Authors

Piwai Tshuma¹, Banothile C E Makhubela², Christophe A Ndamyabera³, Susan A Bourne³, Gift Mehlana¹

Affiliations

¹ Department of Chemical Technology, Faculty of Science and Technology, Midlands State University, Gweru, Zimbabwe.
² Center for Synthesis and Catalysis Department of Chemical Sciences, Faculty of Science, University of Johannesburg, Johannesburg, South Africa.
³ Department of Chemistry, Faculty of Science, University of Cape Town, Cape Town, South Africa.

Abstract

The reaction of Cd(NO₃)₂·4H₂O and Zn(NO₃)₂·6H₂O with the bipyridyl dicarboxylate ligand H₂bpydc (2,2'-bipyridine-4,4'-dicarboxylic acid) afforded two porous metal organic frameworks [Cd(bpydc)₂(DMF)₂·2DMF]_n (JMS-3) and [Zn(bpydc)(DMF)·DMF]_n (JMS-4). X-ray diffraction studies revealed that both JMS-3 and JMS-4 crystallize in the monoclinic crystal. The MOFs possess 2D interdigited networks with (sql) topology. Sorption studies showed that the activated phase of JMS-3 had CO₂ volumetric uptakes of 26.50 and 30.89 cm³ (STP) g^-1 (1.18 and 1.39 mmol g^-1) whist JMS-4 gave 10.96 and 16.08 cm³ (STP) g^-1 (0.49 and 0.71 mmol g^-1) at 298 and 273 K respectively.

Keywords: adsorption; carbon dioxide; catalysis; metal-organic framework; topology.