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Photocatalytic Overall Water Splitting Activity of Templateless Structured Graphitic Nanoparticles Obtained from Cyclodextrins

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Photocatalytic Overall Water Splitting Activity of Templateless Structured Graphitic Nanoparticles Obtained from Cyclodextrins

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dc.contributor.author Peng, Yong es_ES
dc.contributor.author Rendon-Patiño, Alejandra es_ES
dc.contributor.author Franconetti, Antonio es_ES
dc.contributor.author Albero-Sancho, Josep es_ES
dc.contributor.author Primo Arnau, Ana Maria es_ES
dc.contributor.author García Gómez, Hermenegildo es_ES
dc.date.accessioned 2021-05-07T03:32:35Z
dc.date.available 2021-05-07T03:32:35Z
dc.date.issued 2020-07-27 es_ES
dc.identifier.uri http://hdl.handle.net/10251/166064
dc.description.abstract [EN] Pyrolysis of alpha-, beta-, and gamma-cyclodextrins at 900 degrees C under Ar forms porous 3D graphitic carbon nanoparticles with remarkable crystallinity, in which the pore dimensions range from 0.74 to 1.1 nm in the ultra/micropore range as determined by N-2, Ar, and CO2 adsorption. These materials behave as semiconductors with the potential energy of the conduction and valence bands being remarkably dependent in as much as 0.57 eV on the dimensions of the micropores. The photogeneration of electrons and holes was confirmed by photodeposition of Pt (electrons) and PbO2 (holes) nanoparticles by reduction and oxidation, respectively. Importantly, these 3D porous graphitic carbons generate H-2 and O-2 from H2O in the absence of any metal cocatalyst. Theoretical calculations at the DFT level confirm in models the influence of the dimensions of the pores, the presence of defects, and residual oxygen on the band energy and that the occurrence of H2O dissociation is favored inside the pores by a confinement effect. Considering the interest in developing metal-free photocatalyst, the present results show the possibility to tune the band alignment of porous carbon semiconductors by appropriate selection of precursors and the convenient generation of defects. es_ES
dc.description.sponsorship Financial support by the Spanish Ministry of Science and Innovation (Severo Ochoa and CTQ2018-98237-CO2-1) and Generalitat Valenciana (Prometeo 2017-083) is gratefully acknowledged. We also thank the Center of Supercomputing of Galicia (CESGA) for the computational facilities. A.P. thanks the Spanish Ministry of Science and Innovation for a Ramon y Cajal research associate contract. es_ES
dc.language Inglés es_ES
dc.publisher American Chemical Society es_ES
dc.relation.ispartof ACS Applied Energy Materials es_ES
dc.rights Reserva de todos los derechos es_ES
dc.subject Porous carbon es_ES
dc.subject Cyclodextrin pyrolysis es_ES
dc.subject Metal-free photocatalysis es_ES
dc.subject Photocatalytic hydrogen generation es_ES
dc.subject Photocatalytic oxygen generation es_ES
dc.subject.classification QUIMICA ORGANICA es_ES
dc.title Photocatalytic Overall Water Splitting Activity of Templateless Structured Graphitic Nanoparticles Obtained from Cyclodextrins es_ES
dc.type Artículo es_ES
dc.identifier.doi 10.1021/acsaem.0c00789 es_ES
dc.relation.projectID info:eu-repo/grantAgreement/GVA//PROMETEO%2F2017%2F083/ es_ES
dc.relation.projectID info:eu-repo/grantAgreement/AEI/Plan Estatal de Investigación Científica y Técnica y de Innovación 2017-2020/RTI2018-098237-B-C21/ES/HETEROUNIONES DE GRAFENO CON CONFIGURACION CONTROLADA. SINTESIS Y APLICACIONES COMO SOPORTE EN CATALISIS Y EN ELECTRODOS/ es_ES
dc.rights.accessRights Cerrado es_ES
dc.contributor.affiliation Universitat Politècnica de València. Departamento de Química - Departament de Química es_ES
dc.description.bibliographicCitation Peng, Y.; Rendon-Patiño, A.; Franconetti, A.; Albero-Sancho, J.; Primo Arnau, AM.; García Gómez, H. (2020). Photocatalytic Overall Water Splitting Activity of Templateless Structured Graphitic Nanoparticles Obtained from Cyclodextrins. ACS Applied Energy Materials. 3(7):6623-6632. https://doi.org/10.1021/acsaem.0c00789 es_ES
dc.description.accrualMethod S es_ES
dc.relation.publisherversion https://doi.org/10.1021/acsaem.0c00789 es_ES
dc.description.upvformatpinicio 6623 es_ES
dc.description.upvformatpfin 6632 es_ES
dc.type.version info:eu-repo/semantics/publishedVersion es_ES
dc.description.volume 3 es_ES
dc.description.issue 7 es_ES
dc.identifier.eissn 2574-0962 es_ES
dc.relation.pasarela S\430128 es_ES
dc.contributor.funder Generalitat Valenciana es_ES
dc.contributor.funder Agencia Estatal de Investigación es_ES
dc.contributor.funder Ministerio de Ciencia, Innovación y Universidades es_ES
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