| People | Locations | Statistics |
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| Naji, M. |
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| Motta, Antonella |
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| Aletan, Dirar |
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| Mohamed, Tarek |
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| Ertürk, Emre |
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| Taccardi, Nicola |
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| Kononenko, Denys |
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| Petrov, R. H. | Madrid |
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| Alshaaer, Mazen | Brussels |
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| Bih, L. |
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| Casati, R. |
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| Muller, Hermance |
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| Kočí, Jan | Prague |
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| Šuljagić, Marija |
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| Kalteremidou, Kalliopi-Artemi | Brussels |
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| Azam, Siraj |
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| Ospanova, Alyiya |
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| Blanpain, Bart |
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| Ali, M. A. |
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| Popa, V. |
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| Rančić, M. |
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| Ollier, Nadège |
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| Azevedo, Nuno Monteiro |
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| Landes, Michael |
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| Rignanese, Gian-Marco |
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Crespo, João Goulão
Universidade Nova de Lisboa
in Cooperation with on an Cooperation-Score of 37%
Topics
Publications (14/14 displayed)
- 2024A greener route to prepare PEBAX®1074 membranes for gas separation processescitations
- 2022Purification of ferulic acid from corn fibre alkaline extracts for bio-vanillin production using an adsorption processcitations
- 2021Modelling CO2 absorption in aqueous solutions of cholinium lysinate ionic liquidcitations
- 2021Stability of polymeric membranes to UV exposure before and after coating with TiO2 nanoparticlescitations
- 2020A corrosion evaluation of mild carbon steel in reclaimed refinery stripped sour watercitations
- 2020Nanocomposite membranes from nano-particles prepared by polymerization induced self-assembly and their biocidal activitycitations
- 2018Design of alumina monoliths by emulsion-gel castingcitations
- 2018Hydrogel Composite Membranes Incorporating Iron Oxide Nanoparticles as Topographical Designers for Controlled Heteronucleation of Proteinscitations
- 2017Nano-structured magneto-responsive membranes from block copolymers and iron oxide nanoparticlescitations
- 2017A non-invasive optical method for mapping temperature polarization in direct contact membrane distillationcitations
- 2017Morphological, chemical surface and filtration characterization of a new silicon carbide membranecitations
- 2007Comparison of physicochemical properties of new ionic liquids based on imidazolium, quaternary ammonium, and guanidinium cationscitations
- 2005Elucidating interactions of ionic liquids with polymer films using confocal Raman spectroscopycitations
- 2003Organomercurial removal from vaccine production wastewaters in a supported liquid membrane bioreactor
Places of action
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article
Stability of polymeric membranes to UV exposure before and after coating with TiO2 nanoparticles
Abstract
<p>The combination of photocatalysis and membrane filtration in a single reactor has been proposed, since the photocatalytic treatment may degrade the pollutants retained by the membrane and reduce fouling. However, polymeric membranes can be susceptible to degradation by UV radiation and free radicals. In the present study, five commercial polymeric membranes were exposed to ultraviolet (UV) radiation before and after applying a sol–gel coating with TiO<sub>2</sub> nanoparticles. Membrane stability was characterized by changes in hydrophilicity as well as analysis of soluble substances and nanoparticles detached into the aqueous medium, and by Fourier transform infrared spectroscopy (FTIR), scanning electron microscope (SEM), and energy-dispersive X-ray spectrometry (EDS) for structural, morphological, and elemental distribution analysis, respectively. The TiO<sub>2</sub> coating conferred photocatalytic properties to the membranes and protected them during 6 h of UV radiation exposures, reducing or eliminating chemical and morphological changes, and in some cases, improving their mechanical resistance. A selected commercial nanofiltration membrane was coated with TiO<sub>2</sub> and used in a hybrid reactor with a low-pressure UV lamp, promoting photocatalysis coupled with cross-flow filtration in order to remove 17α-ethinylestradiol spiked into an aqueous matrix, achieving an efficiency close to 100% after 180 min of combined filtration and photocatalysis, and almost 80% after 90 min.</p>