TY - JOUR
T1 - Solvent-Driven Gate Opening in MOF-76-Ce
T2 - Effect on CO2 Adsorption
AU - Ethiraj, Jayashree
AU - Bonino, Francesca
AU - Vitillo, Jenny G.
AU - Lomachenko, Kirill A.
AU - Lamberti, Carlo
AU - Reinsch, Helge
AU - Lillerud, Karl Petter
AU - Bordiga, Silvia
N1 - Publisher Copyright:
© 2016 Wiley-VCH Verlag GmbH & Co. KGaA.
PY - 2016/4/7
Y1 - 2016/4/7
N2 - A cerium-based metal-organic framework with MOF-76 topology has been synthesized by a very simple and fast solvothermal method that has been tested for a one gram yield. Variable-temperature powder XRD and X-ray absorption data, analyzed by Rietveld and multiple-scattering extended X-ray absorption fine-structure methods, revealed high thermal stability and the presence of three different stable structures. X-ray absorption near-edge structure and FTIR spectroscopy probed the presence of cerium(III), which was characterized by coordinatively unsaturated sites that, however, played no major role in carbon dioxide adsorption. The material revealed excellent carbon dioxide adsorption properties: the highest gravimetric capacity of 15 wt% was observed at 1.1 bar in the case of the sample activated at 250 °C in vacuum, whereas the strongest interaction energy of 35 kJ mol-1 was observed for the sample activated at 150 °C. Negligible nitrogen uptake of the sample activated at 150 °C indicates that this material is a promising candidate for nitrogen/carbon dioxide separation purposes.
AB - A cerium-based metal-organic framework with MOF-76 topology has been synthesized by a very simple and fast solvothermal method that has been tested for a one gram yield. Variable-temperature powder XRD and X-ray absorption data, analyzed by Rietveld and multiple-scattering extended X-ray absorption fine-structure methods, revealed high thermal stability and the presence of three different stable structures. X-ray absorption near-edge structure and FTIR spectroscopy probed the presence of cerium(III), which was characterized by coordinatively unsaturated sites that, however, played no major role in carbon dioxide adsorption. The material revealed excellent carbon dioxide adsorption properties: the highest gravimetric capacity of 15 wt% was observed at 1.1 bar in the case of the sample activated at 250 °C in vacuum, whereas the strongest interaction energy of 35 kJ mol-1 was observed for the sample activated at 150 °C. Negligible nitrogen uptake of the sample activated at 150 °C indicates that this material is a promising candidate for nitrogen/carbon dioxide separation purposes.
KW - X-ray diffraction
KW - adsorption
KW - carbon dioxide capture
KW - cerium
KW - metal-organic frameworks
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U2 - 10.1002/cssc.201501574
DO - 10.1002/cssc.201501574
M3 - Article
C2 - 26892915
AN - SCOPUS:84959099240
SN - 1864-5631
VL - 9
SP - 713
EP - 719
JO - ChemSusChem
JF - ChemSusChem
IS - 7
ER -