title: Drastic enhancement of the CO2 adsorption properties in sulfone-functionalized Zr- and Hf-UiO-67 MOFs with hierarchical mesopores.
abstract: The sulfone-functionalized Zr- and Hf-UiO-67 metal-organic frameworks with hierarchical mesopores were successfully synthesized using the ligand 4,4'-dibenzoic acid-2,2'-sulfone, with acetic acid or HCl as the modulator. Compared to UiO-67, the zirconium solid shows a remarkable 122% increase in CO2 uptake, reaching 4.8 mmol g(-1) (17.4 wt %) at 1 bar and 273 K (145% at 298 K) and more than 100% increase in CO2/CH4 selectivity.
authors.affiliation: Department of Chemistry, University of Crete , Voutes 71003, Heraklion, Greece.
authors.forename: Pantelis
authors.initials: P
authors.lastname: Xydias
authors.forename: Ioannis
authors.initials: I
authors.lastname: Spanopoulos
authors.forename: Emmanuel
authors.initials: E
authors.lastname: Klontzas
authors.forename: George E
authors.initials: GE
authors.lastname: Froudakis
authors.forename: Pantelis N
authors.initials: PN
authors.lastname: Trikalitis