Tailored Pore Size and Microporosity of Covalent Organic Framework (COF) Membranes for Improved Molecular Separation
Elsevier BV, 2021
Online
academicJournal
Zugriff:
Three highly crystalline truxene-based β-ketoenamine COF membranes (TFP-HETTA, TFP-HBTTA and TFP-HHTTA) are fabricated via a de novo monomer design approach to understand the fundamental correlations between pore structure and molecular separation performance. By introducing bulky alkyl groups into the truxene framework, the pore size of TFP-HETTA, TFP-HBTTA, and TFP-HHTTA are systematically tuned from 1.08 to 0.72 nm. Accordingly, the TFP-HETTA showed good water permeance of 47 L m−2 h−1 bar−1 along with a prominent rejection rate of Reactive Blue (RB, 800 Da) but less than 10% rejection rate of inorganic salts. In contrast, the TFP-HHTTA membrane with pore size of 0.72 nm can reject small dye molecules (SO, 350 Da) and trivalent salts but with a moderate water permeance of 19 L m−2 h−1 bar−1. The pore-flow model rooted from the viscous flow could well fit the observed organic solvent nanofiltration results of all three COF membranes. ; The research work was supported by the KAUST Centre Competitive Fund FCC/1/1972-19 and KAUST baseline fund BAS/1/1375-01.
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Tailored Pore Size and Microporosity of Covalent Organic Framework (COF) Membranes for Improved Molecular Separation
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Autor/in / Beteiligte Person: | Shinde, Digambar ; Cao, Li ; Liu, Xiaowei ; Wonanke, Dinga A.D. ; Zhou, Zongyao ; Hedhili, Mohamed N. ; Addicoat, Matthew ; Huang, Kuo-Wei ; Lai, Zhiping ; Advanced Membranes and Porous Materials Research Center ; Biological and Environmental Science and Engineering (BESE) Division ; Chemical Engineering Program ; Chemical Science Program ; Environmental Science and Engineering ; Homogeneous Catalysis Laboratory (HCL) ; KAUST Catalysis Center (KCC) ; Physical Science and Engineering (PSE) Division ; Science, Surface ; School of Science and Technology, Nottingham Trent University, Nottingham, NG11 8NS, UK |
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Veröffentlichung: | Elsevier BV, 2021 |
Medientyp: | academicJournal |
ISSN: | 2772-4212 (print) |
DOI: | 10.1016/j.memlet.2021.100008 |
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