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dc.contributor.authorLee, Yuan-Tseen_US
dc.contributor.authorChen, San-Yuanen_US
dc.description.abstractIn this study, we proposed that the impregnation of two metal ions in the node of structure of ZIF, formation of mixed metal ZIF is applied to gas separation for hydrogen and carbon dioxide. In the first part, we prepare the nanoparticles for coating on the substrate to act as the nuclei for the secondary growth. The ZIF structures have been characterized by XRD and FTIR. The surface area was determined by N2 adsorption-desorption isotherms and SEM was used to observe the surface morphology and microstructure. The ZIF-8-67 containing both zinc ions (ZIF-8) and cobalt ions (ZIF-67) were synthesized at room temperature under triethylamine (TEA) base aqueous conditions. With increasing mole concentration of triethylamine, the surface area increased significantly, and the particles size obviously decreased. The nanoparticles (100nm) can be uniformly and densely coated on the substrate support for subsequent film growth. In the second stage, the hybrid mixed metal ZIF-8-67 membrane was synthesized on the nanoparticle-seeded substrate by microwave hydrothermal method. We used the UV-Vis to identify cobalt ion in the tetrahedral coordination and changed the mole ratio of the ligand and base to optimize the membrane structure and morphology by XRD and SEM. Finally, the gas separation property of hybrid mixed metal ZIF-8-67 membrane was determined by GPA. This study has successfully introduced zinc ion and cobalt ion into the zeolitic imidazolate framework structure where cobalt has a strong interaction for the carbon dioxide. Therefore, the gas separation test displays lower permeation for carbon dioxide but higher hydrogen/ carbon dioxide separation factor. The permeation of ZIF-8-67 membrane was also examined at different temperatures and demonstrated the stable gas separation factor.en_US
dc.subjectgas separationen_US
dc.subjectzeolitic imidazolate frameworken_US
dc.titleSynthesis, Characterization and H2/CO2 separation of A mixed-metal zeolitic imidazolate framework membraneen_US
Appears in Collections:Thesis