Solvent-Driven Gate Opening in MOF-76-Ce: Effect on CO2 Adsorption.
Jayashree EthirajFrancesca BoninoJenny G VitilloKirill A LomachenkoCarlo LambertiHelge ReinschKarl Petter LillerudSilvia BordigaPublished in: ChemSusChem (2016)
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.
Keyphrases
- carbon dioxide
- metal organic framework
- high resolution
- dual energy
- aqueous solution
- oxide nanoparticles
- single cell
- electron microscopy
- big data
- electronic health record
- air pollution
- gram negative
- mass spectrometry
- machine learning
- single molecule
- liquid chromatography
- magnetic resonance imaging
- magnetic resonance
- artificial intelligence
- multidrug resistant
- solar cells