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Generation of MoS2 quantum dots by laser ablation of MoS2 particles in suspension and their photocatalytic activity for H-2 generation

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Generation of MoS2 quantum dots by laser ablation of MoS2 particles in suspension and their photocatalytic activity for H-2 generation

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dc.contributor.author Garcia-Baldovi, Hermenegildo es_ES
dc.contributor.author Latorre Sánchez, Marcos es_ES
dc.contributor.author Esteve-Adell, Iván es_ES
dc.contributor.author Kham, Anish es_ES
dc.contributor.author Asiri, Abdullah M. es_ES
dc.contributor.author Kosa, Samia A. es_ES
dc.contributor.author García Gómez, Hermenegildo es_ES
dc.date.accessioned 2018-09-10T09:21:35Z
dc.date.available 2018-09-10T09:21:35Z
dc.date.issued 2016 es_ES
dc.identifier.issn 1388-0764 es_ES
dc.identifier.uri http://hdl.handle.net/10251/106867
dc.description.abstract [EN] MoS2 quantum dots (QDs) have been obtained in colloidal suspensions by 532 nm laser ablation (7 ns fwhp/pulse, 50 mJ/pulse) of commercial MoS2 particles in acetonitrile. High-resolution transmission electron microscopy images show a lateral size distribution from 5 to 20 nm, but a more homogeneous particle size of 20 nm can be obtained by silica gel chromatography purification in acetonitrile. MoS2 QDs obtained by laser ablation are constituted by 3-6 MoS2 layers (1.8-4 nm thickness) and exhibit photoluminescence whose lambda(PL) varies from 430 to 530 nm depending on the excitation wavelength. As predicted by theory, the confinement effect and the larger periphery in MoS2 QDs increasing the bandgap and having catalytically active edges are reflected in an enhancement of the photocatalytic activity for H-2 generation upon UV-Vis irradiation using CH3OH as sacrificial electron donor due to the increase in the reduction potential of conduction band electrons and the electron transfer kinetics. es_ES
dc.description.sponsorship Financial support by Spanish Ministry of Economy and Competitiveness (Severo Ochoa and CTQ-2012-32315) and Generalitat Valenciana (Prometeo 2012-13) is gratefully acknowledged. This study was funded by the Deanship of Scientific Research (DSR), King Abdulaziz University, under Grant No. 75-130-35-HiCi. The authors, therefore, acknowledge technical and financial support of KAU. MLS and HGB thank the Spanish Ministry for postgraduate scholarships. es_ES
dc.language Inglés es_ES
dc.publisher Springer-Verlag es_ES
dc.relation MINECO/CTQ2012-32315 es_ES
dc.relation KAU/75-130-35-HiCi
dc.relation.ispartof Journal of Nanoparticle Research es_ES
dc.rights Reserva de todos los derechos es_ES
dc.subject Nanostructures es_ES
dc.subject Few-layer chalcogenides es_ES
dc.subject MoS2 es_ES
dc.subject Photocatalytic hydrogen generation es_ES
dc.subject Photoluminescence es_ES
dc.subject Energy conversion es_ES
dc.subject.classification QUIMICA ORGANICA es_ES
dc.subject.classification QUIMICA ANALITICA es_ES
dc.title Generation of MoS2 quantum dots by laser ablation of MoS2 particles in suspension and their photocatalytic activity for H-2 generation es_ES
dc.type Artículo es_ES
dc.identifier.doi 10.1007/s11051-016-3540-9 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 Garcia-Baldovi, H.; Latorre Sánchez, M.; Esteve-Adell, I.; Kham, A.; Asiri, AM.; Kosa, SA.; García Gómez, H. (2016). Generation of MoS2 quantum dots by laser ablation of MoS2 particles in suspension and their photocatalytic activity for H-2 generation. Journal of Nanoparticle Research. 18(8). doi:10.1007/s11051-016-3540-9 es_ES
dc.description.accrualMethod S es_ES
dc.relation.publisherversion http://doi.org/10.1007/s11051-016-3540-9 es_ES
dc.type.version info:eu-repo/semantics/publishedVersion es_ES
dc.description.volume 18 es_ES
dc.description.issue 8 es_ES
dc.relation.pasarela 328488 es_ES
dc.contributor.funder Ministerio de Economía, Industria y Competitividad (MINECO) es_ES
dc.contributor.funder King Abdulaziz University, Arabia Saudí (KAU)
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