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TitleComparative efficiency of TiO2 nanoparticles in suspension vs. immobilization into P(VDF-TrFE) porous membranes
Author(s)Martins, P. M.
Miranda, R.
Marques, J.
Tavares, C. J.
Botelho, Gabriela
Lanceros-Méndez, S.
Polymer membranes
Wettability and degradation
Issue date2016
PublisherRoyal Society of Chemistry
JournalRSC Advances
CitationMartins, P. M., Miranda, R., Marques, J., Tavares, C. J., Botelho, G., & Lanceros-Mendez, S. (2016). Comparative efficiency of TiO2 nanoparticles in suspension vs. immobilization into P(VDF-TrFE) porous membranes. RSC Advances, 6(15), 12708-12716. doi: 10.1039/c5ra25385c
Abstract(s)Photocatalytic processes based on titanium dioxide (TiO 2 ) nanoparticles have attracted increasing attention in the last decades. However, approaches based on nanoparticles show some drawbacks, in particular due to the need of expensive and time consuming post-treatment of nanoparticles filtration/separation. This hindrance demands the development of immobilized configurations with tailored properties, as an alternative to allow simple recovery of the photocatalytic particles. Thus, this work reports on the development of photocatalytic membranes based on TiO 2 nanoparticles immobilized into a poly(vinylidenefluoride-trifluoroethylene) (P(VDF-TrFE)) membrane and the comparative study of their performance with dispersed TiO 2 nanoparticles. Photocatalytic nanocomposite membranes with a highly porous structure (~75 %) and controlled wettability by NaY addition were successfully produced. These properties were paramount to achieve a methylene blue degradation efficiency of 96 % in 40 min under ultraviolet (UV) irradiation, corresponding to an efficiency loss of just 3 % regarding the TiO 2 nanoparticle assays.
DescriptionSupplementary material available at:
AccessRestricted access (UMinho)
Appears in Collections:CDF - FCD - Artigos/Papers (with refereeing)
CDF - GRF - Artigos/Papers (with refereeing)
CDQuim - Artigos (Papers)

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