Hydrogen Productivity Analysis Using Low Concentration of TiO2-Au Nanoparticles on a Ultraviolet-LED-Based Photocatalytic Reactors

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dc.article.number18834
dc.contributor.authorVaras Concha, Felipe
dc.contributor.authorGuzman, Diego
dc.contributor.authorIsaacs, Mauricio
dc.contributor.authorSaez Navarrete, Cesar
dc.date.accessioned2024-09-01T08:00:15Z
dc.date.available2024-09-01T08:00:15Z
dc.date.issued2021
dc.description.abstractThe productivity of photocatalytic hydrogen generation via photo-reforming of organic compounds has not been studied under low concentrations of catalyst, which could lead to relevant cost savings in future real-scale applications. Herein, it uses half of the lowest concentration of nanoparticles reported of modified P25 TiO2 partially coated with gold. The nanomaterial is prepared using a non-energy intensive, chemical reduction method. Gold content on the TiO2 surface is reported (14%-surface; 9.1%-weight). Dynamic light scattering and transmission electron microscope image analyses show low agglomeration and non-homogeneous shape. Aggregates and gold nanoparticles reach average diameters of 92 and 3.8 nm, respectively. Photocatalytic experiments for hydrogen production are carried out at low concentration of nanoparticles (0.056 g L-1) in methanol-water solution (5%vol.) under 375 nm UV and visible light (20 mW cm(-2)). The system shows a catalyst productivity of 6661 mu mol h(-1) g(-1), a third of the highest reported productivity using methanol (which used a catalyst concentration 18x higher, an alcohol concentration 5x higher, and 100% anatase). The system shows an estimated reaction rate of 373 mu mol L-1 h(-1) with an apparent zero order kinetic, an overall energy conversion efficiency of 0.47%, and an apparent quantum yield of 1.03%.
dc.description.funderANID, through the funds FONDECYT Regular
dc.description.funderComision Nacional de Investigacion Cientifica y Tecnologica (ex CONICYT-Chile)
dc.description.funderCONICYT
dc.format.extent12 páginas
dc.fuente.origenWOS
dc.identifier.doi10.1002/ente.202100469
dc.identifier.eissn2194-4296
dc.identifier.issn2194-4288
dc.identifier.pubmedidMEDLINE:34098824
dc.identifier.scieloidS0012-73532011000300008
dc.identifier.scopusidSCOPUS_ID:85179364068
dc.identifier.urihttps://doi.org/10.1002/ente.202100469
dc.identifier.urihttps://repositorio.uc.cl/handle/11534/87744
dc.identifier.wosidWOS:000722291200001
dc.information.autorucFacultad de Ingeniería; Saez Navarrete, Cesar Antonio; S/I; 104647
dc.issue.numero167
dc.language.isoen
dc.nota.accesoSin adjunto
dc.pagina.final60
dc.pagina.inicio52
dc.revistaENERGY TECHNOLOGY
dc.rightsregistro bibliográfico
dc.subjectgold nanoparticles
dc.subjecthydrogen
dc.subjectlow concentration photocatalysis
dc.subjectphoto-reforming of organic compounds
dc.subjecttitanium dioxide nanoparticles
dc.subjectETHANOL-WATER MIXTURES
dc.subjectAU/TIO2 PHOTOCATALYSTS
dc.subjectAQUEOUS-SOLUTION
dc.subjectTITANIUM-DIOXIDE
dc.subjectH-2 PRODUCTION
dc.subjectNOBLE-METAL
dc.subjectAU
dc.subjectCOCATALYSTS
dc.subjectGENERATION
dc.subjectREDUCTION
dc.subject.ddc170
dc.subject.deweyÉticaes_ES
dc.titleHydrogen Productivity Analysis Using Low Concentration of TiO2-Au Nanoparticles on a Ultraviolet-LED-Based Photocatalytic Reactors
dc.typeartículo
dc.volumen2
sipa.codpersvinculados104647
sipa.indexWOS
sipa.trazabilidadCarga WOS-SCOPUS;01-09-2024
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