Photocatalytic microporous membrane against the increasing problem of water emerging pollutants

Emerging pollutants are an essential class of recalcitrant contaminants that are not eliminated from water after conventional treatment. Here, a photocatalytic microporous membrane based on polyvinylidene difluoride-co-trifluoroethylene (PVDF−TrFE) with immobilised TiO2 nanoparticles, prepared by so...

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Bibliographic Details
Main Author: Martins, Pedro M. (author)
Other Authors: Ribeiro, Joana Margarida Fernandes Silva (author), Teixeira, Sara (author), Petrovykh, Dmitri. Y. (author), Cuniberti, Gianaurelio (author), Pereira, Luciana (author), Lanceros-Méndez, S. (author)
Format: article
Language:eng
Published: 2019
Subjects:
Online Access:http://hdl.handle.net/1822/60397
Country:Portugal
Oai:oai:repositorium.sdum.uminho.pt:1822/60397
Description
Summary:Emerging pollutants are an essential class of recalcitrant contaminants that are not eliminated from water after conventional treatment. Here, a photocatalytic microporous membrane based on polyvinylidene difluoride-co-trifluoroethylene (PVDF−TrFE) with immobilised TiO2 nanoparticles, prepared by solvent casting, was tested against representative emerging pollutants. The structure and composition of these polymeric membranes were characterized by scanning electron microscopy, energy dispersive X-ray spectroscopy, Fourier-transform infrared spectroscopy, porosimetry, and contact angle goniometry. The nanocomposites exhibited a porous structure with a uniform distribution of TiO2 nanoparticles. The addition of TiO2 did not change the structure of the polymeric matrix; however, it increased the wettability of the nanocomposite. The nanocomposites degraded 99% of methylene blue (MB), 95% of ciprofloxacin (CIP), and 48% of ibuprofen (IBP). The microporous nanocomposite exhibited no photocatalytic efficiency loss after four use cycles, corresponding to 20 h of UV irradiation. The reusability of this system confirms the promising nature of polymer nanocomposites as the basis for cost-effective and scalable treatments of emerging pollutants.