Knowledge Management System Of Guangzhou Institute of Energy Conversion, CAS
| Postsynthetic Modification of ZIF-8 Membranes via Membrane Surface Ligand Exchange for Light Hydrocarbon Gas Separation Enhancement | |
James, Joshua B.1; Lang, Lin1,2 ; Meng, Lie1; Lin, Jerry Y. S.1
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| 2020-01-22 | |
| Source Publication | ACS APPLIED MATERIALS & INTERFACES
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| ISSN | 1944-8244 |
| Volume | 12Issue:3Pages:3893-3902 |
| Corresponding Author | Lin, Jerry Y. S.(jerry.lin@asu.edu) |
| Abstract | The ability to tailor the pore structure of metal- organic framework (MOF) membranes enables synthesis of new or modified MOF membranes with enhanced separation characteristics. This work employs a modified version of solvent-assisted ligand exchange, termed membrane surface ligand exchange (MSLE), to modify the pore structure of zeolitic imidazolate framework-8 (ZIF-8) membranes. This paper is the first to perform a time-based, ex situ characterization and gas permeation study of ZIF-8 MSLE with 5,6-DBIM (DBIM, dimethylbenzimidazole) to effectively narrow the ZIF-8 pores, enhance light hydrocarbon gas-phase separations, and give insight into the exchange mechanism with respect to time and temperature. The results show that relatively fast exchange kinetics occur mainly at the outer surface of the ZIF-8 membrane during the initial 30 min of exchange and enables significant (40-70%) increases in propylene/propane selectivity with minimal (10-20%) propylene permeance losses for the modified ZIF-8 membranes. We postulate as the reaction time proceeds, the ligand-exchange rate slows as the DBIM linker diffuses into the ZIF-8 membrane beyond the external surface, exchanges with the original linker, disrupts the original framework's crystallinity, and then increases long-range order/crystallinity as the reaction proceeds. The H-2/C-2 separation factor increases with increased 5,6-DBIM content in the ZIF-8 framework which is facilitated by increased MSLE time and reaction temperature. |
| Keyword | ZIF-8 membranes gas separation ligand-exchange modification propane-propylene separation MOF membranes |
| DOI | 10.1021/acsami.9b19964 |
| WOS Keyword | ZEOLITIC IMIDAZOLATE FRAMEWORKS ; THERMAL-STABILITY ; ADSORPTION ; MIXTURES ; SINGLE |
| Indexed By | SCI |
| Language | 英语 |
| Funding Project | National Science Foundation[CBET-1511005] |
| WOS Research Area | Science & Technology - Other Topics ; Materials Science |
| Funding Organization | National Science Foundation |
| WOS Subject | Nanoscience & Nanotechnology ; Materials Science, Multidisciplinary |
| WOS ID | WOS:000509428300062 |
| Publisher | AMER CHEMICAL SOC |
| Citation statistics | |
| Document Type | 期刊论文 |
| Identifier | http://ir.giec.ac.cn/handle/344007/26418 |
| Collection | 中国科学院广州能源研究所 |
| Corresponding Author | Lin, Jerry Y. S. |
| Affiliation | 1.Arizona State Univ, Tempe, AZ 85287 USA 2.Chinese Acad Sci, Guangzhou Inst Energy Convers, Guangzhou, Peoples R China |
| Recommended Citation GB/T 7714 | James, Joshua B.,Lang, Lin,Meng, Lie,et al. Postsynthetic Modification of ZIF-8 Membranes via Membrane Surface Ligand Exchange for Light Hydrocarbon Gas Separation Enhancement[J]. ACS APPLIED MATERIALS & INTERFACES,2020,12(3):3893-3902. |
| APA | James, Joshua B.,Lang, Lin,Meng, Lie,&Lin, Jerry Y. S..(2020).Postsynthetic Modification of ZIF-8 Membranes via Membrane Surface Ligand Exchange for Light Hydrocarbon Gas Separation Enhancement.ACS APPLIED MATERIALS & INTERFACES,12(3),3893-3902. |
| MLA | James, Joshua B.,et al."Postsynthetic Modification of ZIF-8 Membranes via Membrane Surface Ligand Exchange for Light Hydrocarbon Gas Separation Enhancement".ACS APPLIED MATERIALS & INTERFACES 12.3(2020):3893-3902. |
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