Journal
JOURNAL OF MEMBRANE SCIENCE
Volume 610, Issue -, Pages -Publisher
ELSEVIER
DOI: 10.1016/j.memsci.2020.118275
Keywords
Metal-organic frameworks; UiO-66; Membranes; Transition metal dichalcogenides; Gas separation
Categories
Funding
- National Natural Science Foundation of China [21176231]
- Liaoning Revitalization Talents Program [XLYC1807084]
- Thousand Youth Talents Program
- Technology Innovation Team of Dalian University of Technology [DUT2017TB01]
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Zirconium-based MOF (Zr-MOF) membranes have attracted widespread attention due to their highly tailorable pore aperture and adsorption behavior achieved by functional group decoration and ligand/cluster-missing defect regulation as well as extraordinary chemical/thermal stability. Nevertheless, it has remained a great challenge to further improve the separation performance of Zr-MOF membranes due to very limited available zirconium sources and heating modes. In this study, we prepared polycrystalline UiO-66 membranes exhibiting unprecedented CO2/N-2 selectivity (31.3). The use of layered ZrS2, a representative of transition-metal dichal-cogenides (TMDCs), as zirconium source during tertiary solvothermal growth was found to be indispensable for improving the separation performance of UiO-66 membranes. As far as we know, the CO2/N-2 selectivity reported in this study was the highest among all pristine polycrystalline MOF membranes measured under ambient conditions. More importantly, our study highlighted the importance of concurrent metal source and fabrication process innovation in performance enhancement of polycrystalline MOF membranes.
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