Nanofibers of chitosan-polycaprolactone blends as active support for photocatalytic nanoparticles: Outstanding role of chitosan in the degradation of an organic dye in water

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dc.contributor.authorCordoba, Alexander
dc.contributor.authorGuernelli, Moreno
dc.contributor.authorMontalti, Marco
dc.contributor.authorSaldias, Cesar
dc.contributor.authorFocarete, Maria Letizia
dc.contributor.authorLeiva, Angel
dc.date.accessioned2025-01-20T17:26:38Z
dc.date.available2025-01-20T17:26:38Z
dc.date.issued2023
dc.description.abstractHybrid nanofibers of a chitosan-polycaprolactone blend containing titanium dioxide nanoparticles TiO2NPs, were prepared through electrospinning to study their adsorption and photocatalytic degradation capabilities of the model organic water pollutants, rhodamine B, RhB. To obtain uniform and bead-free nanofibers, an optimization of the electrospinning parameters was performed. The optimization was carried out by systematically adjusting the solution conditions (solvent, concentration, and polymer ratio) and instrumental parameters (voltage, needle tip-collector distance, and flow). The obtained materials were characterized by FT-IR, TGA, DSC, SEM, TEM, mechanical tensile test, and water contact angle. The photoactivity was investigated using a batchtype system by following UV-Vis absorbance and fluorescence of RhB.TiO2NPs were incorporated ex-situ into the polymer matrix, contributing to good mechanical properties and higher hydrophilicity of the material. The results showed that the presence of chitosan in the nanofibers significantly increased the adsorption of RhB and its photocatalytic degradation by TiO2NPs (5, 55 and 80 % of RhB degradation with NFs of PCL, TiO2/PCL and TiO2/CS-PCL, after 30 h of light irradiation, respectively), evidencing a synergistic effect between them. The results are attributed to an attraction of RhB by chitosan to the vicinity of TiO2NPs, favouring initial adsorption and degradation, phenomenon known as "bait-and-hook-anddestruct" effect.
dc.fuente.origenWOS
dc.identifier.doi10.1016/j.ijbiomac.2023.127111
dc.identifier.eissn1879-0003
dc.identifier.issn0141-8130
dc.identifier.urihttps://doi.org/10.1016/j.ijbiomac.2023.127111
dc.identifier.urihttps://repositorio.uc.cl/handle/11534/91557
dc.identifier.wosidWOS:001091659700001
dc.language.isoen
dc.revistaInternational journal of biological macromolecules
dc.rightsacceso restringido
dc.subjectNano composites
dc.subjectHybrid composites
dc.subjectElectro-spinning
dc.subjectNano particles
dc.subjectSynergism
dc.subjectPolymer fibers
dc.subject.ods03 Good Health and Well-being
dc.subject.odspa03 Salud y bienestar
dc.titleNanofibers of chitosan-polycaprolactone blends as active support for photocatalytic nanoparticles: Outstanding role of chitosan in the degradation of an organic dye in water
dc.typeartículo
dc.volumen253
sipa.indexWOS
sipa.trazabilidadWOS;2025-01-12
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