| 초록 |
Metal-organic frameworks (MOFs) are in the spotlight as materials for heat integration of low-grade waste heat with their water absorption properties owing to tunable structure, low adsorption energy, and large specific surface area. Here, we exploited Fe-based multi-ligand MOFs mixed two ligands containing the same species, but the different number of a functional group to improve water absorption ability. Owing to the mixed MOFs structure, defects were formed by structural distortion in the crystal structure which makes additional coordinatively unsaturated metal sites (CUS), which play the role of enlarging the surface area of MOFs. Our Fe-based multi-ligand MOFs exhibited highly efficient water-adsorption ability compared to previously reported MIL-100 and MIL-101. Furthermore, our approach is expected to apply gas sorbents such as carbon capture storage with their excess CUS and large specific surface area. |
