Hydrogel composites based on chitosan and CuAuTiO<sub>2</sub> photocatalysts for hydrogen production under simulated sunlight irradiation

Simple item page
dc.contributor.authorRamirez, Oscar
dc.contributor.authorLopez-Frances, Anton
dc.contributor.authorBaldovi, Herme G.
dc.contributor.authorSaldias, Cesar
dc.contributor.authorNavalon, Sergio
dc.contributor.authorLeiva, Angel
dc.contributor.authorDiaz, David Diaz
dc.date.accessioned2025-01-20T16:10:27Z
dc.date.available2025-01-20T16:10:27Z
dc.date.issued2024
dc.description.abstractThis study explored the photocatalytic hydrogen evolution reaction (HER) using novel biohydrogel composites comprising chitosan, and a photocatalyst consisting in TiO2 P25 decorated with Au and/or Cu mono- and bimetallic nanoparticles (NPs) to boost its optical and catalytic properties. Low loads of Cu and Au (1 mol%) were incorporated onto TiO2 via a green photodeposition methodology. Characterization techniques confirmed the incorporation of decoration metals as well as improvements in the light absorption properties in the visible light interval (lambda > 390 nm) and electron transfer capability of the semiconductors. Thereafter, Au and/or Cu NP- supported TiO2 were incorporated into chitosan-based physically crosslinked hydrogels revealing significant interactions between chitosan functional groups (hydroxyls, amines and amides) with the NPs to ensure its encapsulation. These materials were evaluated as photocatalysts for the HER using water and methanol mixtures under simulated sunlight and visible light irradiation. Sample CuAuTiO2/ChTPP exhibited a maximum hydrogen generation of 1790 mu mol g(-1) h(-1) under simulated sunlight irradiation, almost 12-folds higher compared with TiO2/ChTPP. Also, the nanocomposites revealed a similar tendency under visible light with a maximum hydrogen production of 590 mu mol g(-1) h(-1) . These results agree with the efficiency of photoinduced charge separation revealed by transient photocurrent and EIS.
dc.fuente.origenWOS
dc.identifier.doi10.1016/j.ijbiomac.2024.132898
dc.identifier.eissn1879-0003
dc.identifier.issn0141-8130
dc.identifier.urihttps://doi.org/10.1016/j.ijbiomac.2024.132898
dc.identifier.urihttps://repositorio.uc.cl/handle/11534/90213
dc.identifier.wosidWOS:001296818000001
dc.language.isoen
dc.revistaInternational journal of biological macromolecules
dc.rightsacceso restringido
dc.subjectBiohydrogel
dc.subjectPhotocatalysis
dc.subjectHydrogen production
dc.titleHydrogel composites based on chitosan and CuAuTiO<sub>2</sub> photocatalysts for hydrogen production under simulated sunlight irradiation
dc.typeartículo
dc.volumen273
sipa.indexWOS
sipa.trazabilidadWOS;2025-01-12
Files
Collections
Artículos de revistas