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Wastewater treatment of real effluents by microfiltration using poly(vinylidene...
Zioui, Djamila; Martins, Pedro Manuel Abreu; Aoudjit, Lamine; Salazar, Hugo; Lanceros-Méndez, S.Over the last decades, the growing contamination of wastewater, mainly caused by industrial processes, improper sewage, natural calamities, and a variety of anthropogenic activities, has caused an increase in water-borne diseases. Notably, industrial applications require careful consideration as they pose significant threats to human health and ecosystem biodiversity due to the production of persistent and comp...
Smart and multifunctional materials based on electroactive poly(vinylidene fluo...
Costa, Carlos Miguel Silva; Cardoso, Vanessa Fernandes; Martins, Pedro Libânio Abreu; Correia, Daniela Maria Silva; Gonçalves, Renato FerreiraFrom scientific and technological points of view, poly(vinylidene fluoride), PVDF, is one of the most exciting polymers due to its overall physicochemical characteristics. This polymer can crystalize into five crystalline phases and can be processed in the form of films, fibers, membranes, and specific microstructures, being the physical properties controllable over a wide range through appropriate chemical mod...
Reusable nanocomposite membranes for highly efficient arsenite and arsenate dua...
Salazar, H.; Martins, Pedro Manuel Abreu; Valverde, A.; Fernández de Luis, R.,; Vilas-Vilela, J. L.; Ferdov, S.; Botelho, Gabriela; Lanceros-Méndez, S.Nanocomposite membranes (NCMs) of poly(vinylidene fluoride-hexafluoropropylene), PVDF-HFP, with different yttrium carbonate and magnetite loadings, are prepared, and their dual adsorption capacity over neutral arsenite and anionic arsenate species is evaluated. The nanoparticles (NPs) and the corresponding NCMs are fully characterized in morphology, microstructure, thermal, and surface properties. The nanocompo...
Multifunctional hybrid membranes for photocatalytic and adsorptive removal of w...
Martins, Pedro Manuel Abreu; Santos, Bruno; Salazar, H.; Carabineiro, Sónia; Botelho, Gabriela; Tavares, Carlos J.; Lanceros-Méndez, S.The focus of this work lies on the production of a multifunctional materials that allows the combination of photocatalysis and adsorption in a unique polymeric substrate. For this purpose, Au/TiO2 and Y2(CO3)3 nanoparticles were immobilised on a poly (vinylidene fluoride hexafluoropropylene), (PVDF-HFP), substrate, and the characterisation of these materials was performed, as well as the pollutant removal effic...
Size effect in hybrid TiO2:Au nanostars for photocatalytic water remediation ap...
Zheng, Fangyuan; Martins, Pedro Manuel Abreu; Queirós, Joana M.; Tavares, Carlos J.; Vilas-Vilela, José Luis; Lanceros-Méndez, S.; Reguera, JavierTiO<sub>2</sub>:Au-based photocatalysis represents a promising alternative to remove contaminants of emerging concern (CECs) from wastewater under sunlight irradiation. However, spherical Au nanoparticles, generally used to sensitize TiO<sub>2</sub>, still limit the photocatalytic spectral band to the 520 nm region, neglecting a high part of sun radiation. Here, a ligand-free synthesis of TiO<sub>2</sub>:Au nan...
Solar photocatalytic membranes: an experimental and artificial neural network m...
Aoudjit, Lamine; Salazar, Hugo; Zioui, Djamila; Sebti, Aicha; Martins, Pedro Manuel Abreu; Lanceros-Méndez, S.The presence of contaminants of emerging concern (CEC), such as pharmaceuticals, in water sources is one of the main concerns nowadays due to their hazardous properties causing severe effects on human health and ecosystem biodiversity. Niflumic acid (NFA) is a widely used anti-inflammatory drug, and it is known for its non-biodegradability and resistance to chemical and biological degradation processes. In this...
Magnetic nanoparticles for biomedical applications: From the soul of the Earth ...
Martins, Pedro Manuel Abreu; Lima, Ana C.; Ribeiro, Sylvie Oliveira; Lanceros-Méndez, S.; Martins, Pedro Libânio AbreuPrecisely engineered magnetic nanoparticles (MNPs) have been widely explored for applications including theragnostic platforms, drug delivery systems, biomaterial/device coatings, tissue engineering scaffolds, performance-enhanced therapeutic alternatives and even in SARS-CoV-2 detection strips. Such popularity is due to their unique, challenging, and tailorable physicochemical/magnetic properties. Given the wi...
Crystal morphology control of synthetic giniite for enhanced photo-Fenton activ...
Martins, Pedro Manuel Abreu; Salazar, H.; Aoudjit, L.; Gonçalves, Renato Ferreira; Zioui, D.; Fidalgo-Marijuan, A.; Costa, Carlos Miguel SilvaMetronidazole (MNZ) is a recalcitrant antibiotic with toxic and carcinogenic effects in aquatic environments. In this work, Fe-5(FO4)(4)(OH)(3)center dot 2H(2)O (giniite) particles were synthesised with three different alkaline cations (Li+, Na+ and K+) and used as Fenton catalysts for MNZ removal. It is shown that the addition of different cations during the hydrothermal synthesis process promote different mor...
Large-scale aqueous synthesis of Cu(In,Ga)Se2nanoparticles for photocatalytic d...
Gonçalves, Bruna Ferreira; Martins, Pedro Manuel Abreu; Lagrow, Alec P.; Botelho, Gabriela; Salonen, Laura M.; Lanceros-Méndez, S.; Ko, Yury V. KolenEnvironmentally friendly synthesis of Cu(In,Ga)Se2 (CIGS) nanoparticles (NPs) is pivotal for producing sustainable photocatalytic compounds to be applied in the remediation of contaminants of emerging concern from water. To this end, we herein report an aqueous synthesis of CIGS NPs, followed by annealing, to give access to phasepure CIGS crystals with chalcopyrite structure and no signs of secondary phases. Mo...
Can photocatalytic and magnetic nanoparticles be a threat to aquatic detrital f...
Pradhan, Arunava; Fernandes, Marta; Martins, Pedro Manuel Abreu; Pascoal, Cláudia; Lanceros-Méndez, S.; Cássio, FernandaFreshwaters are likely to serve as reservoirs for engineered nanomaterials (ENMs) due to their accelerated unintentional release, increasing the relevance of assessing their impacts on aquatic biota and the ecosystem processes they drive. Stream-dwelling microbes, particularly fungi, and invertebrate shredders play an essential role in the decomposition of organic matter and transfer of energy to higher trophic...