Synthesis of micro–mesoporous CPO-27-Mg@KIT-6 composites and their test in CO 2 adsorption

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

NEW JOURNAL OF CHEMISTRY

ROYAL SOC CHEMISTRY

Lugar: CAMBRIDGE; Año: 2020

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 anin situ hydrothermal method. The composites were characterised by powder X-ray diffraction (PXRD),Fourier-transform infrared spectroscopy (FTIR), thermogravimetric analysis (TGA), microscopictechniques (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 ofpressure, 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 thosereported in the literature. Therefore, this study opens new pathways for designing porous structuredMOF-based materials with advanced gas separation performance.