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Membranes
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The Latest Achievements and Study Progress of Metal–Organic Framework (MOF)...
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The Latest Achievements and Study Progress of Metal–Organic Framework (MOF) Membrane

A special issue of Membranes (ISSN 2077-0375). This special issue belongs to the section "Membrane Chemistry".

Deadline for manuscript submissions: closed (31 July 2023) | Viewed by 5616

Special Issue Editors

Dr. Hui Cui

E-Mail Website
Guest Editor
1. Physics Division, Argonne National Laboratory, Lemont, IL 60439, USA
2. Department of Chemistry and International Institute for Nanotechnology (IIN), Northwestern University, Evanston, IL 60208, USA
Interests: metal-organic frameworks; hydrogen-bonded organic frameworks; organic synthesis; porous materials; supramolecular; gas separation/storage; sensing; luminesent materials; structure-property relationship and materials design
Dr. Yingxiang Ye

E-Mail Website
Guest Editor
Department of Chemistry, University of North Texas, Denton, TX 76201, USA
Interests: metal–organic frameworks; hydrogen-bonding organic frameworks; porous organic polymers for their applications in proton conduction, gas storage/separation, and fluorescence sensing

Special Issue Information

Dear Colleagues,

As one of the leading scientists in the study of Metal–Organic Framework (MOF) membranes, we would like to invite you to submit a manuscript for an exciting Special Issue of Membranes entitled “The Latest Achievements and Study Progress of Metal–Organic Framework (MOF) Membranes”. Membranes is an international, peer-reviewed, open-access journal dedicated to providing a forum for publishing papers that advance our understanding of membrane structure, performance, processes, and applications that cover membrane chemistry, physics, engineering, and biology.

MOFs as a new type of new organic–inorganic hybrid material have attracted attention for their advantageous features, such as permanent porosity, tunable pore size and function, structure diversity, and large surface area. As a result, the idea of incorporating MOFs into the form of membranes has been successfully prepared and widely used in the fields of separation, catalysis, optics, sensing, etc. This Special Issue aims at soliciting research articles to encompass the recent advances in the fields of structural chemistry and functional materials for establishing the structure and property relationships in MOF membranes. Potential topics include, but are not limited to, the synthesis, characterization, and optimization of MOF membranes, functional MOF membranes in separation, catalysis, electrochemistry, sensing, etc.

In this Special Issue, all types of manuscripts (review/article/communications..) will be considered for publication.

We look forward to your contribution.

Dr. Hui Cui
Dr. Yingxiang Ye
Guest Editors

Manuscript Submission Information

Manuscripts should be submitted online at www.mdpi.com by registering and logging in to this website. Once you are registered, click here to go to the submission form. Manuscripts can be submitted until the deadline. All submissions that pass pre-check are peer-reviewed. Accepted papers will be published continuously in the journal (as soon as accepted) and will be listed together on the special issue website. Research articles, review articles as well as short communications are invited. For planned papers, a title and short abstract (about 100 words) can be sent to the Editorial Office for announcement on this website.

Submitted manuscripts should not have been published previously, nor be under consideration for publication elsewhere (except conference proceedings papers). All manuscripts are thoroughly refereed through a single-blind peer-review process. A guide for authors and other relevant information for submission of manuscripts is available on the Instructions for Authors page. Membranes is an international peer-reviewed open access monthly journal published by MDPI.

Please visit the Instructions for Authors page before submitting a manuscript. The Article Processing Charge (APC) for publication in this open access journal is 2700 CHF (Swiss Francs). Submitted papers should be well formatted and use good English. Authors may use MDPI's English editing service prior to publication or during author revisions.

Keywords

  • metal-organic frameworks
  • membrane
  • mixed-matrix membrane
  • membrane synthesis
  • membrane characterization
  • functional membrane

Published Papers (3 papers)

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Research

17 pages, 12347 KiB  
Article
Separation of n-Butanol from Aqueous Solutions via Pervaporation Using PDMS/ZIF-8 Mixed-Matrix Membranes of Different Particle Sizes
by Ali Zamani, Jules Thibault and Fatma Handan Tezel
Membranes 2023, 13(7), 632; https://doi.org/10.3390/membranes13070632 - 29 Jun 2023
Viewed by 1601
Abstract
The use of mixed matrix membranes (MMMs) to facilitate the production of biofuels has attracted significant research interest in the field of renewable energy. In this study, the pervaporation separation of butanol from aqueous solutions was studied using a series of MMMs, including [...] Read more.
The use of mixed matrix membranes (MMMs) to facilitate the production of biofuels has attracted significant research interest in the field of renewable energy. In this study, the pervaporation separation of butanol from aqueous solutions was studied using a series of MMMs, including zeolitic imidazolate frameworks (ZIF-8)-polydimethylsiloxane (PDMS) and zinc oxide-PDMS mixed matrix membranes. Although several studies have reported that mixed matrix membranes incorporating ZIF-8 nanoparticles showed improved pervaporation performances attributed to their intrinsic microporosity and high specific surface area, an in-depth study on the role of ZIF-8 nanoparticle size in MMMs has not yet been reported. In this study, different average sizes of ZIF-8 nanoparticles (30, 65, and 80 nm) were synthesized, and the effects of particle size and particle loading content on the performance of butanol separation using MMMs were investigated. Furthermore, zinc oxide nanoparticles, as non-porous fillers with the same metalcore as ZIF-8 but with a very different geometric shape, were used to illustrate the importance of the particle geometry on the membrane performance. Results showed that small-sized ZIF-8 nanoparticles have better permeability and selectivity than medium and large-size ZIF-8 MMMs. While the permeation flux increased continuously with an increase in the loading of nanoparticles, the selectivity reached a maximum for MMM with 8 wt% smaller-size ZIF-8 nanoparticle loading. The flux and butanol selectivity increased by 350% and 6%, respectively, in comparison to those of neat PDMS membranes prepared in this study. Full article
(This article belongs to the Special Issue The Latest Achievements and Study Progress of Metal–Organic Framework (MOF) Membrane)
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12 pages, 3955 KiB  
Article
Polymer-Infiltrated Metal–Organic Frameworks for Thin-Film Composite Mixed-Matrix Membranes with High Gas Separation Properties
by Hyo Jun Min, Min-Bum Kim, Youn-Sang Bae, Praveen K. Thallapally, Jae Hun Lee and Jong Hak Kim
Membranes 2023, 13(3), 287; https://doi.org/10.3390/membranes13030287 - 28 Feb 2023
Cited by 5 | Viewed by 1951
Abstract
Thin-film composite mixed-matrix membranes (TFC-MMMs) have potential applications in practical gas separation processes because of their high permeance (gas flux) and gas selectivity. In this study, we fabricated a high-performance TFC-MMM based on a rubbery comb copolymer, i.e., poly(2-[3-(2H-benzotriazol-2-yl)-4-hydroxyphenyl] ethyl methacrylate)-co-poly(oxyethylene methacrylate) (PBE), [...] Read more.
Thin-film composite mixed-matrix membranes (TFC-MMMs) have potential applications in practical gas separation processes because of their high permeance (gas flux) and gas selectivity. In this study, we fabricated a high-performance TFC-MMM based on a rubbery comb copolymer, i.e., poly(2-[3-(2H-benzotriazol-2-yl)-4-hydroxyphenyl] ethyl methacrylate)-co-poly(oxyethylene methacrylate) (PBE), and metal–organic framework MOF-808 nanoparticles. The rubbery copolymer penetrates through the pores of MOF-808, thereby tuning the pore size. In addition, the rubbery copolymer forms a defect-free interfacial morphology with polymer-infiltrated MOF-808 nanoparticles. Consequently, TFC-MMMs (thickness = 350 nm) can be successfully prepared even with a high loading of MOF-808. As polymer-infiltrated MOF is incorporated into the polymer matrix, the PBE/MOF-808 membrane exhibits a significantly higher CO2 permeance (1069 GPU) and CO2/N2 selectivity (52.7) than that of the pristine PBE membrane (CO2 permeance = 431 GPU and CO2/N2 selectivity = 36.2). Therefore, the approach considered in this study is suitable for fabricating high-performance thin-film composite membranes via polymer infiltration into MOF pores. Full article
(This article belongs to the Special Issue The Latest Achievements and Study Progress of Metal–Organic Framework (MOF) Membrane)
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19 pages, 4614 KiB  
Article
Investigation on the Performance of CO2 Absorption in Ceramic Hollow-Fiber Gas/Liquid Membrane Contactors
by Chii-Dong Ho, Hsuan Chang, Yu-Han Chen, Thiam Leng Chew and Jui-Wei Ke
Membranes 2023, 13(2), 249; https://doi.org/10.3390/membranes13020249 - 19 Feb 2023
Cited by 1 | Viewed by 1409
Abstract
The absorption efficiencies of CO2 in ceramic hollow-fiber membrane contactors using monoethanolamine (MEA) absorbent under both cocurrent- and countercurrent-flow operations were investigated theoretically and experimentally; various MEA absorbent flow rates, CO2 feed flow rates, and inlet CO2 concentrations were used [...] Read more.
The absorption efficiencies of CO2 in ceramic hollow-fiber membrane contactors using monoethanolamine (MEA) absorbent under both cocurrent- and countercurrent-flow operations were investigated theoretically and experimentally; various MEA absorbent flow rates, CO2 feed flow rates, and inlet CO2 concentrations were used as parameters. Theoretical predictions of the CO2 absorption flux were analyzed by developing the mathematical formulations based on Happel’s free surface model in terms of mass transfer resistances in series. The experiments of the CO2 absorption were conducted by using alumina (Al2O3) hollow-fiber membranes to confirm the accuracy of the theoretical predictions. The simplified expression of the Sherwood number was formulated to calculate the mass transfer coefficient of the CO2 absorption incorporating experimental data. The data were obtained numerically using the fourth-order Runge–Kutta method to predict the concentration distribution and absorption rate enhancement under various fiber packing configurations accomplished by the CO2/N2 stream passing through the fiber cells. The operations of the hollow-fiber membrane contactor encapsulating N = 7 fiber cells and N = 19 fiber cells of different packing densities were fabricated in this work to examine the device performance. The accuracy derivation between experimental results and theoretical predictions for cocurrent- and countercurrent-flow operations were 1.31×10−2≤E≤4.35×10−2 and 3.90×10−3≤E≤2.43×10−2, respectively. A maximum of 965.5% CO2 absorption rate enhancement was found in the module with embedding multiple fiber cells compared with that in the device with inserting single-fiber cell. Implementing more fiber cells offers an inexpensive method of improving the absorption efficiency, and thus the operations of the ceramic hollow-fiber membrane contactor with implementing more fiber cells propose a low-priced design to improve the absorption rate enhancement. The higher overall CO2 absorption rate was achieved in countercurrent-flow operations than that in cocurrent-flow operations. Full article
(This article belongs to the Special Issue The Latest Achievements and Study Progress of Metal–Organic Framework (MOF) Membrane)
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