TY - JOUR
T1 - Carbon dioxide adsorption in amine-functionalized mixed-ligand metal-organic frameworks of UiO-66 topology
AU - Ethiraj, Jayashree
AU - Albanese, Elisa
AU - Civalleri, Bartolomeo
AU - Vitillo, Jenny G.
AU - Bonino, Francesca
AU - Chavan, Sachin
AU - Shearer, Greig C.
AU - Lillerud, Karl Petter
AU - Bordiga, Silvia
N1 - Publisher Copyright:
© 2014 Wiley-VCH Verlag GmbH & Co. KGaA.
PY - 2014/12
Y1 - 2014/12
N2 - A series of mixed-ligand [1,4-benzenedicarboxylic acid (BDC)/2-amino-1,4-benzenedicarboxylic acid (ABDC)] UiO-66 metal-organic frameworks (MOFs) synthesized through two different methods (low (LT) and high temperature (HT)) have been investigated for their carbon dioxide adsorption properties from 0 to 1 bar to clarify the role of amino loading on carbon dioxide uptake. Volumetric CO2 isotherms show that the CO2 capacity (normalized to the Langmuir surface area) increases with a degree of functionalization of about 46 %; for similar NH2 contents, the same values are found for both synthetic procedures. Microcalorimetric isotherms reveal that aminofunctionalized materials have a larger differential heat of adsorption (qdiff) towards CO2; reaching 27(25) and 20(22) kJmol-1 on HT(LT)-UiO-66-NH2 and UiO-66, respectively, at the lowest equilibrium pressures used in this study. All experimental results are supported by values obtained through quantum mechanical calculations.
AB - A series of mixed-ligand [1,4-benzenedicarboxylic acid (BDC)/2-amino-1,4-benzenedicarboxylic acid (ABDC)] UiO-66 metal-organic frameworks (MOFs) synthesized through two different methods (low (LT) and high temperature (HT)) have been investigated for their carbon dioxide adsorption properties from 0 to 1 bar to clarify the role of amino loading on carbon dioxide uptake. Volumetric CO2 isotherms show that the CO2 capacity (normalized to the Langmuir surface area) increases with a degree of functionalization of about 46 %; for similar NH2 contents, the same values are found for both synthetic procedures. Microcalorimetric isotherms reveal that aminofunctionalized materials have a larger differential heat of adsorption (qdiff) towards CO2; reaching 27(25) and 20(22) kJmol-1 on HT(LT)-UiO-66-NH2 and UiO-66, respectively, at the lowest equilibrium pressures used in this study. All experimental results are supported by values obtained through quantum mechanical calculations.
KW - Ab initio calculations
KW - Adsorption
KW - Carbon dioxide capture
KW - IR spectroscopy
KW - Metal-organic frameworks
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U2 - 10.1002/cssc.201402694
DO - 10.1002/cssc.201402694
M3 - Article
C2 - 25302675
AN - SCOPUS:84919360917
SN - 1864-5631
VL - 7
SP - 3382
EP - 3388
JO - ChemSusChem
JF - ChemSusChem
IS - 12
ER -