Role of Nb2O5 Crystal Phases on the Photocatalytic Conversion of Lignin Model Molecules and Selectivity for Value‐Added Products

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dc.article.numbere202301594
dc.catalogadoraba
dc.contributor.authorRojas de la Fuente, Susana Dennis
dc.contributor.authorRafaela, Gabriela
dc.contributor.authorEspinoza Villalobos, Nicole Margarita
dc.contributor.authorDíaz, Donovan
dc.contributor.authorSalazar, Ricardo
dc.contributor.authorCáceres Jensen, Lizethly
dc.contributor.authorEscalona, Néstor
dc.contributor.authorBarrientos, Lorena
dc.date.accessioned2024-04-11T18:11:01Z
dc.date.available2024-04-11T18:11:01Z
dc.date.issued2024
dc.description.abstractThe photocatalytic conversion in aqueous media of phenol and guaiacol as a lignin model compound using Nb2O5 with different crystal phases was studied. Nb2O5 particles were synthesized using hydrothermal methods, where it was observed that changes in the solvent control their morphology and crystal phase. Different photocatalytic behavior of Nb2O5 was observed with the selected model compounds, indicating that its selection directly impacts the resulting conversion and selectivity rates as well as the reaction pathway, highlighting the relevance of model molecule selection. Photocatalytic conversion of phenol showed conversion rate (C%) up to 25 % after 2 h irradiation and high selectivity (S%) to pyrogallol (up to 50 %). Orthorhombic Nb2O5 spheres favored conversion through free hydroxyl radicals while monoclinic rods did not convert phenol. Guaiacol photocatalytic oxidation showed high conversion rate but lower selectivity. Orthorhombic and monoclinic Nb2O5 favored the formation of resorcinol with S % ~0.43 % (C % ~33 %) and ~13 % (C % ~27 %) respectively. The mixture of both phases enhanced the guaiacol conversion rate to ~55 % with ~17 % of selectivity to salicylaldehyde. The use of radical scavengers provided information to elucidate the reaction pathway for these model compounds, showing that different reaction pathways may be obtained for the same photocatalyst if the model compound is changed.
dc.fechaingreso.objetodigital2024-08-30
dc.fuente.origenORCID
dc.identifier.doi10.1002/cssc.202301594
dc.identifier.eissn1864-564X
dc.identifier.issn1864-564X
dc.identifier.urihttps://doi.org/10.1002/cssc.202301594
dc.identifier.urihttps://repositorio.uc.cl/handle/11534/85030
dc.information.autorucInstituto de Física; Rojas de la Fuente, Susana Dennis; 0000-0003-0557-0734; 177460
dc.information.autorucEscuela de Química; Espinoza Villalobos, Nicole Margarita; 0000-0001-9341-3928; 1070606
dc.information.autorucInstituto de Física; Díaz, Donovan; 0000-0002-3391-3485; 1008066
dc.information.autorucEscuela de Química; Salazar, Ricardo; 0000-0003-2180-6022; 1289256
dc.information.autorucEscuela de Ingeniería; Escalona, Néstor; 0000-0002-2628-4609; 1021533
dc.information.autorucEscuela de Química; Barrientos, Lorena; 0000-0002-9641-6507; 1025341
dc.language.isoen
dc.nota.accesoContenido parcial
dc.pagina.final11
dc.pagina.inicio1
dc.revistaChemSusChem
dc.rightsacceso restringido
dc.subject.ddc510
dc.subject.deweyMatemática física y químicaes_ES
dc.titleRole of Nb2O5 Crystal Phases on the Photocatalytic Conversion of Lignin Model Molecules and Selectivity for Value‐Added Products
dc.typeartículo
sipa.codpersvinculados177460
sipa.codpersvinculados1070606
sipa.codpersvinculados1008066
sipa.codpersvinculados1289256
sipa.codpersvinculados1021533
sipa.codpersvinculados1025341
sipa.trazabilidadORCID;2024-03-25
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