Selective photocatalytic conversion of guaiacol using g-C3N4 metal free nanosheets photocatalyst to add-value products

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dc.article.number113513
dc.catalogadoraba
dc.contributor.authorRojas de la Fuente, Susana Dennis
dc.contributor.authorEspinoza Villalobos, Nicole Margarita
dc.contributor.authorSalazar, R.
dc.contributor.authorEscalona, Néstor
dc.contributor.authorContreras, D.
dc.contributor.authorMelin, V
dc.contributor.authorLaguna Bercero, M. A.
dc.contributor.authorSanchez Arenillas, M.
dc.contributor.authorVergara, E.
dc.contributor.authorCaceres Jensen, L.
dc.contributor.authorRodríguez Becerra, J.
dc.contributor.authorBarrientos, Lorena
dc.date.accessioned2023-11-06T21:04:23Z
dc.date.available2023-11-06T21:04:23Z
dc.date.issued2021
dc.description.abstractValorization of lignin into high valuable chemical is a critical challenge. Its availability is a key factor for the development of viable lignocellulosic processes to replace fossil derived compounds. In this work, new insights on the high photocatalytic conversion of guaiacol (82%) as a lignin model compound was achieved, also, high selectivity to p-benzoquinone (59%), catechol (27%), and pyrogallol (6%) was obtained using metal-free pyrolyzed g-C3N4 under visible light irradiation. To highlight the new insights, experimental parameters were modified to control the reaction mechanism to increase selectivity and photo-conversion. g-C3N4 photocatalyst was synthesized through urea calcination at 550 degrees C and the photocatalytic performance was assessed in terms of pyrolysis time, where higher time resulted in better photocatalytic activity. This effect was attributed to smaller structures and therefore better quantum confinement of the charges. The oxidation was promoted by OH radicals, which were detected through EPR operando mode and the addition of radical scavengers. A reaction pathway was proposed, in which the OH attacks guaiacol through a methoxy group. The photocatalytic reaction can be tuned using external oxidant agents such as O-2 and/or H2O2 to promote certain radical formation, enhancing conversion rates and promoting selectivity for a specific product, where yield shifting from p-benzoquinone to pyrogallol was experimentally observed.
dc.description.funderANID Millennium Science Initiative Program
dc.description.funderFondequip
dc.description.funderFondecyt
dc.description.funderPIA CCTE
dc.description.funderVRI Puente Project
dc.description.funderProyecto Apoyo Investigacion Basica at PUC Chile
dc.description.funderDICYT-USACH
dc.description.funderSpanish Ministry of Science and Innovation
dc.fechaingreso.objetodigital2023-11-06
dc.format.extent11 páginas
dc.fuente.origenWOS
dc.identifier.doi10.1016/j.jphotochem.2021.113513
dc.identifier.eissn1873-2666
dc.identifier.issn1010-6030
dc.identifier.scopusidSCOPUS_ID:85114191813
dc.identifier.urihttps://doi.org/10.1016/j.jphotochem.2021.113513
dc.identifier.urihttps://repositorio.uc.cl/handle/11534/75234
dc.identifier.wosidWOS:000696934100003
dc.information.autorucEscuela de Química; Espinoza Villalobos, Nicole Margarita; 0000-0001-9341-3928; 1070606
dc.information.autorucEscuela de Química; Escalona, Néstor; 0000-0002-2628-4609; 1021533
dc.information.autorucEscuela de Química; Barrientos, Lorena; 0000-0002-9641-6507; 1025341
dc.information.autorucInstituto de Física; Rojas de la Fuente, Susana Dennis; 0000-0003-0557-0734; 177460
dc.language.isoen
dc.nota.accesoContenido parcial
dc.pagina.final11
dc.pagina.inicio1
dc.publisherELSEVIER SCIENCE SA
dc.revistaJournal of Photochemistry and Photobiology A: Chemistry
dc.rightsacceso restringido
dc.subjectPhotocatalysis
dc.subjectGuaiacol conversion
dc.subjectBiomass
dc.subjectRadical detection
dc.subjectUVA-visible light
dc.subject.ddc510
dc.subject.deweyMatemática física y químicaes_ES
dc.subject.ods06 Clean Water and Sanitation
dc.subject.odspa06 Agua limpia y saneamiento
dc.titleSelective photocatalytic conversion of guaiacol using g-C3N4 metal free nanosheets photocatalyst to add-value products
dc.typeartículo
dc.volumen421
sipa.codpersvinculados1070606
sipa.codpersvinculados1021533
sipa.codpersvinculados1025341
sipa.codpersvinculados177460
sipa.indexWoS
sipa.indexScopus
sipa.trazabilidadWOS;18-03-2022
sipa.trazabilidadORCID;2023-11-06
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