Ultrathin Low-Crystallinity MOF Membranes Fabricated by Interface Layer Polarization Induction
| Autor: | Zhi Wang, Zhihua Qiao, Chongli Zhong, Michael D. Guiver, Zhengqing Zhang, Yueyao Liang, Donghai Mei |
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| Rok vydání: | 2020 |
| Předmět: |
Diethanolamine
Materials science Mechanical Engineering Metal ions in aqueous solution 02 engineering and technology Permeance 010402 general chemistry 021001 nanoscience & nanotechnology 01 natural sciences 0104 chemical sciences Crystallinity chemistry.chemical_compound Membrane Chemical engineering chemistry Mechanics of Materials Propane General Materials Science 0210 nano-technology Polarization (electrochemistry) Selectivity |
| Zdroj: | Advanced materials (Deerfield Beach, Fla.). 32(34) |
| ISSN: | 1521-4095 |
| Popis: | Practical, ultrathin metal-organic framework (MOF) membranes have the potential to achieve otherwise difficult separations, but current fabrication methods still face challenges in the simultaneous improvement of both selectivity and permeance. Here, ultrathin, low-crystallinity-state MOF (LC-MOF) membranes are realized by a facile general method of interface layer polarization induction. This is achieved using an interface layer having metal ions with dense and uniform distribution, resulting in the creation of abundant open metal sites. Three types of LC-MOF membranes (45-150 nm) are fabricated, among which ZIF-8 membranes modified in situ with diethanolamine (DZIF-8) display the best performance for propylene/propane separation, showing unprecedented propylene permeance (2000-3000 Gas Permeance Units) with very high propylene/propane selectivity (90-120). |
| Databáze: | OpenAIRE |
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