Synthesis of micro-mesoporous CPO-27-Mg@KIT-6 composites and their test in CO2adsorption

VILLARROEL-ROCHA, D.; GODOY, AGUSTÍN A.; TONCÓN-LEAL, C.; VILLARROEL-ROCHA, J.; MORENO, M.S.; BERNINI, MARIA C.; NARDA, GRISELDA E.; SAPAG, K.

NEW JOURNAL OF CHEMISTRY

ROYAL SOC CHEMISTRY

Año: 2020 vol. 44 p. 10056 - 10065

1144-0546

In this work, we present the preparation of hybrid materials constituted by a Metal Organic Framework (type CPO-27-Mg) and a mesoporous silica (type KIT-6) which were successfully assembled through an in situ hydrothermal method. The composites were characterised by powder X-ray diffraction (PXRD), Fourier-Transform infrared spectroscopy (FTIR), thermogravimetric analysis (TGA), microscopic techniques (SEM and TEM), N2 adsorption-desorption isotherms at 77 K and CO2 adsorption at 273 K; these techniques confirmed the obtaining of hybrid materials and not simple physical mixtures. Finally, the hybrid materials were tested in the CO2 adsorption at different temperatures and from 0-10 bar of pressure, where the exposure to high relative humidity were also monitored. The CPO-27-Mg@KIT-6 (1 : 1) and (2 : 1) composites exhibited interesting values of CO2 adsorption capacity, compared with those reported in the literature. Therefore, this study opens new pathways for designing porous structured MOF-based materials with advanced gas separation performance. This journal is