Preparation of metal-organic frameworks MIL-53(Cr) and its absorption performance

MIL-53(Cr), was hydrothermally synthesized under new reaction conditions (1:2:280). Solvent-replacement was used during the post treatment of MIL-53(Cr). The synthesized MIL-53(Cr) was characterized by XRD, TG, SEM and IGA, respectively, and its absorption performance was examined by the experiments of pure gas absorptions of N₂, CO₂, CH₄, C₂H₄ and C₂H₆, respectively. The results show that using the new recipe can make the preparation of MIL-53(Cr) more stable, and the solvent-replacement method can remove the impurities from the porous channels of the MIL-53(Cr) almost completely and make the prepared MIL-53(Cr) with high purity. After post treatment, the specific surface area of the MIL-53(Cr) is 1355.9 m²·g^-1, and via a series gas absorption experiments, the prepared MIL-53(Cr) shows a broad prospect in different applications.