Waste organic dye removal using MOF-based electrospun nanofibers of high amine density

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A1 Alkuperäisartikkeli tieteellisessä aikakauslehdessä
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Chemical Engineering Journal, Volume 466
The exceptional structural stability of UiO-66 metal–organic framework (MOF) and ligands' functional groups render UiO-66 as a versatile candidate for multiple applications, including wastewater treatment. The possibility of a broad spectrum of post-synthetic modification of UiO-66 further expands its prospective uses. However, commercial applications of UiO-66 have been hindered by the polycrystalline nature of the powder. In this research, modification to obtain UiO-66-NH2 and post-processing with nanofibers comprising chitosan and polyvinyl alcohol (PVA) were applied to faciliate deployment as a suitable option for water decontamination. MOF nanoparticles were post-synthetically modified with 2,4,6-trichloro-1,3,5-triazine (TCT) and 5-phenyl-tetrazole (PT) to produce high-amine containing UiO-66, thus introducing active nitrogen-containing functional groups that enhanced the removal efficiency of targeted molecules from aqueous media. A systematic study was undertaken to optimize the supporting nanofibers and to demonstrate that even a low MOF functionalization, of up to 7- wt%, offered a maximum methyl orange adsorption capacity of 619 mg/g, superior to most adsorbents reported so far. Furthermore, selectivity, regeneration ability, and the effect of ambient conditions were demonstrated.
Funding Information: Dr. Arjmand would like to thank the Canada Research Chairs program for its financial support. The authors would like to acknowledge Syilx Okanagan First Nation for allowing to conduct research in their unceded ancestorial traditional territory. Mr. Ahmadijokani, Dr. Kamkar, and Dr. Rojas are grateful for funding support from the Canada Excellence Research Chair Program ( CERC-2018-00006 ) and the Canada Foundation for Innovation (Project number 38623). The authors also would like to thank Mr. Aydin Badrian (aydinbadrian.com) for his efforts on the graphical parts of this study. Publisher Copyright: © 2023 The Authors
Dye removal, Electrospinning, Metal-organic framework, Nanofiber, UiO-66-NH
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Ahmadijokani, F, Molavi, H, Amini, M, Bahi, A, Wuttke, S, Aminabhavi, T M, Kamkar, M, Rojas, O J, Ko, F & Arjmand, M 2023, ' Waste organic dye removal using MOF-based electrospun nanofibers of high amine density ', Chemical Engineering Journal, vol. 466, 143119 . https://doi.org/10.1016/j.cej.2023.143119