Metal organic framework-loaded polyethersulfone/polyacrylonitrile photocatalytic nanofibrous membranes under visible light irradiation for the removal of Cr(vi) and phenol from water.

Autor: Koushkbaghi S; Science and Research Branch, Islamic Azad University Yazd Iran., Kermani HA; Science and Research Branch, Islamic Azad University Yazd Iran., Jamshidifard S; Faculty of Chemical Engineering, Iran University of Science & Technology Tehran Iran., Faramarzi H; Chemical Engineering Departments, Razi University Kermanshah Iran., Khosravi M; Department of Environmental Engineering, Graduate Faculty of Environment, University of Tehran Tehran Iran., Abadi PG; Environmental Health Engineering Research Center, Alborz University of Medical Sciences Karaj Iran., Jazi FS; School of Science and Technology, The University of Georgia Tbilisi Georgia., Irani M; Department of Pharmaceutics, Faculty of Pharmacy, Alborz University of Medical Sciences Karaj Iran Irani_mo@ut.ac.ir.
Jazyk: angličtina
Zdroj: RSC advances [RSC Adv] 2023 Apr 25; Vol. 13 (19), pp. 12731-12741. Date of Electronic Publication: 2023 Apr 25 (Print Publication: 2023).
DOI: 10.1039/d3ra00959a
Abstrakt: In this work, various amounts of the UiO-66-NH 2 and UiO-66-NH 2 /TiO 2 MOFs have been loaded into polyacrylonitrile (PAN) nanofibers supported on polyethersulfone (PES). The visible light irradiation was used to investigate the influence of pH (2-10), initial concentration (10-500 mg L -1 ), and time (5-240 min) on the removal efficiency of phenol and Cr(vi) in the presence of MOFs. The reaction time: 120 min, catalyst dosage: 0.5 g L -1 , pH: 2 for Cr(vi) ions and pH: 3 for phenol molecules were optimum to degrade phenol and to reduce Cr(vi) ions. The characterization of the produced samples was performed using X-ray diffraction, ultraviolet-visible diffuse reflectance spectroscopy, scanning electron microscopy, and Brunauer-Emmett-Teller analysis. The capability of synthesized photocatalytic membranes was investigated for the removal of phenol and Cr(vi) ions from water. The water flux, Cr(vi) and phenol solutions fluxes and their rejection percentages were evaluated under pressure of 2 bar in the presence of visible light irradiation and in the dark. The best performance of the synthesized nanofibers was obtained for UiO-66-NH 2 /TiO 2 MOF 5 wt% loaded-PES/PAN nanofibrous membranes at temperature of 25 °C and pH of 3. Results demonstrated the high capability of MOFs-loaded nanofibrous membranes for the removal of various contaminants such as Cr(vi) ions and phenol molecules from water.
Competing Interests: There are no conflicts to declare.
(This journal is © The Royal Society of Chemistry.)
Databáze: MEDLINE
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