Polyvinylidene Fluoride-Graphene Oxide Membranes for Dye Removal under Visible Light Irradiation

[EN] In this study, polyvinylidene fluoride (PVDF)-graphene oxide (GO) membranes were obtained by employing triethyl phosphate (TEP) as a solvent. GO nanosheets were prepared and characterized in terms of scanning and transmission electron microscopy (SEM and TEM, respectively), atomic force microscopy (AFM), X-ray photoelectron spectroscopy (XPS), chemical analysis and inductively coupled plasma mass spectroscopy (ICP). Two different phase inversion techniques, Non-Solvent Induced Phase Separation (NIPS) and Vapour-Induced Phase Separation (VIPS)/NIPS, were applied to study the effect of fabrication procedure on the membrane structure and properties. Membranes were characterized by SEM, AFM, pore size, porosity, contact angle and mechanical tests, and finally tested for photocatalytic methylene blue (MB+) degradation under visible light irradiation. The effect of different pH values of dye aqueous solutions on the photocatalytic efficiency was investigated. Finally, the influence of NaCl salt on the MB+ photodegradation process was also evaluated.The authors acknowledge the financial support from Iran Science Ministry. The authors also sincerely thank the Institute on Membrane Technology, National Research Council of Italy (ITM-CNR) for kindly collaborate.Alyarnezhad, S.; Marino, T.; Parsa, JB.; Galiano, F.; Ursino, C.; García Gómez, H.; Puche, M.... (2020). Polyvinylidene Fluoride-Graphene Oxide Membranes for Dye Removal under Visible Light Irradiation. E-Polymers. 12(7):1-19. https://doi.org/10.3390/polym12071509S119127Figoli, A., Ursino, C., Galiano, F., Di Nicolò, E., Campanelli, P., Carnevale, M. C., & Criscuoli, A. (2017). Innovative hydrophobic coating of perfluoropolyether (PFPE) on commercial hydrophilic membranes for DCMD application. Journal of Membrane Science, 522, 192-201. doi:10.1016/j.memsci.2016.08.066Dao, V.-D., Vu, N. H., & Choi, H.-S. (2020). 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