https://scholars.lib.ntu.edu.tw/handle/123456789/598140
標題: | Suppressing Defect Formation in Metal-Organic Framework Membranes via Plasma-Assisted Synthesis for Gas Separations | 作者: | Kan M.-Y Lyu Q Chu Y.-H Hsu C.-C Lu K.-L Lin L.-C DUN-YEN KANG JERRY CHENG-CHE HSU LI-CHIANG LIN |
關鍵字: | CPO-8-BPY;dielectric barrier discharge plasma;membrane gas separation;metal-organic framework;MOF membrane;Defects;Dielectric devices;Dielectric materials;Electric discharges;Grain size and shape;Metal-Organic Frameworks;Nuclear magnetic resonance spectroscopy;Organic polymers;Organometallics;Particle size;Separation;Synthesis (chemical);Dielectric barrier discharge plasmas;Gas transport properties;Grain size distribution;Metalorganic frameworks (MOFs);Molecular simulations;Plasma-assisted synthesis;Solid state characterization;Solution phase synthesis;Gas permeable membranes | 公開日期: | 2021 | 卷: | 13 | 期: | 35 | 起(迄)頁: | 41904-41915 | 來源出版物: | ACS Applied Materials and Interfaces | 摘要: | Metal-organic frameworks (MOFs) are considered as promising materials for membrane gas separations. Structural defects within a pure MOF membrane can considerably reduce its selectivity and possibly result in a nonselective separation. This work proposes a solution-phase synthesis with dielectric barrier discharge (DBD) plasma to suppress the formation of defects in the pure MOF membrane of CPO-8-BPY. Through comprehensive solid-state characterization with XRD, SEM, XPS, solid-state NMR, and XAFS, DBD plasma is demonstrated to facilitate deprotonation in the H2aip linker, which leads to a smaller and more uniform particle size of CPO-8-BPY. The narrow grain size distribution effectively reduces the pinhole-type defects in the pure CPO-8-BPY membrane and endows it with good ideal selectivity for H2/CH4 (αH2/CH4 = 28.2) and N2/CH4 (αN2/CH4 = 5.4). The selectivity for H2/CH4 of this membrane from a mixed-gas permeation test is found to be 15.4. Molecular simulations are also performed to gain insights into the gas transport properties of this MOF. The results suggest that ligand rotation plays an important role in CPO-8-BPY when being applied to the membrane separation of N2/CH4. ? 2021 American Chemical Society. |
URI: | https://www.scopus.com/inward/record.uri?eid=2-s2.0-85114625714&doi=10.1021%2facsami.1c13134&partnerID=40&md5=fcee472a706151a34a7793316483a4df https://scholars.lib.ntu.edu.tw/handle/123456789/598140 |
ISSN: | 19448244 | DOI: | 10.1021/acsami.1c13134 |
顯示於: | 化學工程學系 |
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