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Preparation and Characterization of TiO2-PVDF/PMMA Blend Membranes Using an Alternative Non-Toxic Solvent for UF/MF and Photocatalytic Application

1
Department, Unité de Développement des Equipements Solaires, UDES /Centre de Développement des Energies Renouvelables, CDER, Tipaza 42004, Algeria
2
Département génie de l’Environnement, Ecole Nationale Polytechnique, Alger 16200, Algérie
3
Institute on Membrane Technology (ITM-CNR), Via P. Bucci 17c, 87036 Rende (CS), Italy
4
Faculty of Technology, University Hassiba Benbouali of Chlef, Chlef 02000, Algeria
5
Faculty of Science, University of Bouira, Bouira 02180, Algeria
*
Authors to whom correspondence should be addressed.
Academic Editor: Teresa Poerio
Molecules 2019, 24(4), 724; https://doi.org/10.3390/molecules24040724
Received: 20 January 2019 / Revised: 14 February 2019 / Accepted: 16 February 2019 / Published: 17 February 2019
(This article belongs to the Special Issue Sustainability in Membrane Production and Membrane Operations)
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Abstract

The approach of the present work is based on the use of poly (methylmethacrylate) (PMMA) polymer, which is compatible with PVDF and TiO2 nanoparticles in casting solutions, for the preparation of nano-composites membranes using a safer and more compatible solvent. TiO2 embedded poly (vinylidene fluoride) (PVDF)/PMMA photocatalytic membranes were prepared by phase inversion method. A non-solvent induced phase separation (NIPS) coupled with vapor induced phase separation (VIPS) was used to fabricate flat-sheet membranes using a dope solution consisting of PMMA, PVDF, TiO2, and triethyl phosphate (TEP) as an alternative non-toxic solvent. Membrane morphology was examined by scanning electron microscopy (SEM). Backscatter electron detector (BSD) mapping was used to monitor the inter-dispersion of TiO2 in the membrane surface and matrix. The effects of polymer concentration, evaporation time, additives and catalyst amount on the membrane morphology and properties were investigated. Tests on photocatalytic degradation of methylene blue (MB) were also carried out using the membranes entrapped with different concentrations of TiO2. The results of this study showed that nearly 99% MB removal can be easily achieved by photocatalysis using TiO2 immobilized on the membrane matrix. Moreover, it was observed that the quantity of TiO2 plays a significant role in the dye removal. View Full-Text
Keywords: polymeric membranes; photocatalytic membranes; blend polymers; TiO2 catalyst; organic pollutants; non-toxic solvent polymeric membranes; photocatalytic membranes; blend polymers; TiO2 catalyst; organic pollutants; non-toxic solvent
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Benhabiles, O.; Galiano, F.; Marino, T.; Mahmoudi, H.; Lounici, H.; Figoli, A. Preparation and Characterization of TiO2-PVDF/PMMA Blend Membranes Using an Alternative Non-Toxic Solvent for UF/MF and Photocatalytic Application. Molecules 2019, 24, 724.

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