Mixed-linker MOF-303 membranes for pervaporation
Metal-organic frameworks (MOFs) hold great promise as porous materials for pervaporation applications. However, the exploration of MOF membranes in this field is still in its early stages. One of the main challenges is the relatively low mass flux and stability of pure MOF membranes compared to othe...
| Main Authors: | , , , , , , , |
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| Format: | Article |
| Language: | English |
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Elsevier
2023-11-01
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| Series: | Journal of Membrane Science Letters |
| Subjects: | |
| Online Access: | http://www.sciencedirect.com/science/article/pii/S277242122300017X |
| _version_ | 1797397575570030592 |
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| author | Fang-Hsuan Hu Li-Tang Chi Guan-Bo Syu Tsyr-Yan Yu Ming-Pei Lin Jiun-Jen Chen Wen-Yueh Yu Dun-Yen Kang |
| author_facet | Fang-Hsuan Hu Li-Tang Chi Guan-Bo Syu Tsyr-Yan Yu Ming-Pei Lin Jiun-Jen Chen Wen-Yueh Yu Dun-Yen Kang |
| author_sort | Fang-Hsuan Hu |
| collection | DOAJ |
| description | Metal-organic frameworks (MOFs) hold great promise as porous materials for pervaporation applications. However, the exploration of MOF membranes in this field is still in its early stages. One of the main challenges is the relatively low mass flux and stability of pure MOF membranes compared to other materials used in pervaporation. In this study, we propose a novel approach to enhance the separation performance of MOF membranes for water and ethanol separation. Our strategy involves incorporating the 2,5-thiophenedicarboxylic acid (TDC) linker into the MOF-303 structure, partially replacing the 3,5-pyrazoledicarboxylic acid (PDC) linker. The goal is to increase the aperture size of the microporous channels in the pristine MOF-303 membrane, thereby improving the mass flux. X-ray diffraction characterization, combined with Rietveld refinement, confirmed that the partial substitution of PDC with TDC resulted in an increased pore-limiting diameter (PLD) of MOF-303. For instance, the pristine MOF-303 exhibited a PLD of 5.78 Å, while MOF-303(70/30) with 70% TDC replacement displayed a PLD of 6.02 Å. To fabricate the mixed-linker MOF-303 membranes, we utilized a seeded growth method, which yielded membranes with dense layers, as confirmed by scanning electron microscopy and air permeation characterization. The prepared membranes were subjected to pervaporation tests to evaluate their performance in separating 90 wt.% ethanol at 60 °C. The pristine MOF-303 membrane exhibited notable separation capabilities, with an average flux of 0.071 kg·m−2·hr−1 and a water/ethanol separation factor of 5371. Surpassing the unmodified MOF-303, the mixed-linker MOF-303(50/50) membrane demonstrated improved mass flux and water/ethanol separation factor. Specifically, the MOF-303(50/50) membrane displayed an average flux of 0.092 kg·m−2·hr−1 and a water/ethanol separation factor of 8500. Importantly, the unmodified MOF-303 membrane exhibited instability during prolonged pervaporation operation, whereas the mixed-linker MOF-303(50/50) membrane effectively addressed this issue. Further analysis using in situ Fourier transform infrared spectroscopy and water adsorption characterization revealed that MOF-303(50/50) possessed a strong affinity for water, comparable to the pristine MOF-303. Overall, our study highlights the potential of the mixed-linker approach to optimize the separation performance and stability of MOF-based membranes for pervaporation application. |
| first_indexed | 2024-03-09T01:12:05Z |
| format | Article |
| id | doaj.art-ccbf348de75041199ee6eb6a767c104e |
| institution | Directory Open Access Journal |
| issn | 2772-4212 |
| language | English |
| last_indexed | 2024-03-09T01:12:05Z |
| publishDate | 2023-11-01 |
| publisher | Elsevier |
| record_format | Article |
| series | Journal of Membrane Science Letters |
| spelling | doaj.art-ccbf348de75041199ee6eb6a767c104e2023-12-11T04:17:39ZengElsevierJournal of Membrane Science Letters2772-42122023-11-0132100053Mixed-linker MOF-303 membranes for pervaporationFang-Hsuan Hu0Li-Tang Chi1Guan-Bo Syu2Tsyr-Yan Yu3Ming-Pei Lin4Jiun-Jen Chen5Wen-Yueh Yu6Dun-Yen Kang7Department of Chemical Engineering, National Taiwan University, No. 1, Sec. 4, Roosevelt Road, Taipei 10617, TaiwanDepartment of Chemical Engineering, National Taiwan University, No. 1, Sec. 4, Roosevelt Road, Taipei 10617, TaiwanDepartment of Chemical Engineering, National Taiwan University, No. 1, Sec. 4, Roosevelt Road, Taipei 10617, TaiwanInstitute of Atomic and Molecular Sciences, Academia Sinica, No. 1, Sec. 4, Roosevelt Road, Taipei 10617, Taiwan; International Graduate Program of Molecular Science and Technology, National Taiwan University, No. 1, Sec. 4, Roosevelt Road, Taipei 10617, TaiwanDepartment of Chemical Engineering, National Taiwan University, No. 1, Sec. 4, Roosevelt Road, Taipei 10617, TaiwanGreen Energy and Environment Research Laboratories, Industrial Technology Research Institute, No. 195, Sec. 4, Chung Hsing Road, Hsinchu 31040, Taiwan; Corresponding authors at: Department of Chemical Engineering, National Taiwan University, No. 1, Sec. 4, Roosevelt Road, Taipei 10617, Taiwan.Department of Chemical Engineering, National Taiwan University, No. 1, Sec. 4, Roosevelt Road, Taipei 10617, Taiwan; Corresponding authors at: Department of Chemical Engineering, National Taiwan University, No. 1, Sec. 4, Roosevelt Road, Taipei 10617, Taiwan.Department of Chemical Engineering, National Taiwan University, No. 1, Sec. 4, Roosevelt Road, Taipei 10617, Taiwan; International Graduate Program of Molecular Science and Technology, National Taiwan University, No. 1, Sec. 4, Roosevelt Road, Taipei 10617, Taiwan; Corresponding authors at: Department of Chemical Engineering, National Taiwan University, No. 1, Sec. 4, Roosevelt Road, Taipei 10617, Taiwan.Metal-organic frameworks (MOFs) hold great promise as porous materials for pervaporation applications. However, the exploration of MOF membranes in this field is still in its early stages. One of the main challenges is the relatively low mass flux and stability of pure MOF membranes compared to other materials used in pervaporation. In this study, we propose a novel approach to enhance the separation performance of MOF membranes for water and ethanol separation. Our strategy involves incorporating the 2,5-thiophenedicarboxylic acid (TDC) linker into the MOF-303 structure, partially replacing the 3,5-pyrazoledicarboxylic acid (PDC) linker. The goal is to increase the aperture size of the microporous channels in the pristine MOF-303 membrane, thereby improving the mass flux. X-ray diffraction characterization, combined with Rietveld refinement, confirmed that the partial substitution of PDC with TDC resulted in an increased pore-limiting diameter (PLD) of MOF-303. For instance, the pristine MOF-303 exhibited a PLD of 5.78 Å, while MOF-303(70/30) with 70% TDC replacement displayed a PLD of 6.02 Å. To fabricate the mixed-linker MOF-303 membranes, we utilized a seeded growth method, which yielded membranes with dense layers, as confirmed by scanning electron microscopy and air permeation characterization. The prepared membranes were subjected to pervaporation tests to evaluate their performance in separating 90 wt.% ethanol at 60 °C. The pristine MOF-303 membrane exhibited notable separation capabilities, with an average flux of 0.071 kg·m−2·hr−1 and a water/ethanol separation factor of 5371. Surpassing the unmodified MOF-303, the mixed-linker MOF-303(50/50) membrane demonstrated improved mass flux and water/ethanol separation factor. Specifically, the MOF-303(50/50) membrane displayed an average flux of 0.092 kg·m−2·hr−1 and a water/ethanol separation factor of 8500. Importantly, the unmodified MOF-303 membrane exhibited instability during prolonged pervaporation operation, whereas the mixed-linker MOF-303(50/50) membrane effectively addressed this issue. Further analysis using in situ Fourier transform infrared spectroscopy and water adsorption characterization revealed that MOF-303(50/50) possessed a strong affinity for water, comparable to the pristine MOF-303. Overall, our study highlights the potential of the mixed-linker approach to optimize the separation performance and stability of MOF-based membranes for pervaporation application.http://www.sciencedirect.com/science/article/pii/S277242122300017XMetal-organic frameworkMOFMOF membranePervaporationMixed-linker MOF |
| spellingShingle | Fang-Hsuan Hu Li-Tang Chi Guan-Bo Syu Tsyr-Yan Yu Ming-Pei Lin Jiun-Jen Chen Wen-Yueh Yu Dun-Yen Kang Mixed-linker MOF-303 membranes for pervaporation Journal of Membrane Science Letters Metal-organic framework MOF MOF membrane Pervaporation Mixed-linker MOF |
| title | Mixed-linker MOF-303 membranes for pervaporation |
| title_full | Mixed-linker MOF-303 membranes for pervaporation |
| title_fullStr | Mixed-linker MOF-303 membranes for pervaporation |
| title_full_unstemmed | Mixed-linker MOF-303 membranes for pervaporation |
| title_short | Mixed-linker MOF-303 membranes for pervaporation |
| title_sort | mixed linker mof 303 membranes for pervaporation |
| topic | Metal-organic framework MOF MOF membrane Pervaporation Mixed-linker MOF |
| url | http://www.sciencedirect.com/science/article/pii/S277242122300017X |
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