Composites of laminar nanostructured ZnO and VOx - Nanotubes Hybrid as visible light active photocatalysts
Author
dc.contributor.author
Benavente Espinosa, Eglantina
Author
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Navas, Daniel
Author
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Devis, Sindy
Author
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Segovia, Marjorie
Author
dc.contributor.author
Sotomayor Torres, Clivia
Author
dc.contributor.author
González Moraga, Guillermo
Admission date
dc.date.accessioned
2018-07-18T16:45:18Z
Available date
dc.date.available
2018-07-18T16:45:18Z
Publication date
dc.date.issued
2018
Cita de ítem
dc.identifier.citation
Catalysts, 2018, 8, 93
es_ES
Identifier
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10.3390/catal8020093
Identifier
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https://repositorio.uchile.cl/handle/2250/149994
Abstract
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A series of hybrid heterostructured nanocomposites of ZnO with V2O5 nanotubes (VOx-NTs) in different mixing ratios were synthesized, with the aim of reducing the recombination of photoinduced charge carriers and to optimize the absorption of visible light. The study was focused on the use of heterostructured semiconductors that can extend light absorption to the visible range and enhance the photocatalytic performance of ZnO in the degradation of methylene blue as a model pollutant. The addition of VOx-NTs in the synthesis mixture led to a remarkable performance in the degradation of the model dye, with hybrid ZnO (stearic acid)/VOx-NTs at a ratio of 1:0.06 possessing the highest photocatalytic activity, about seven times faster than pristine zinc oxide. Diffuse reflectance spectroscopic measurements and experiments in the presence of different trapping elements allowed us to draw conclusions regarding the band positions and photocatalytic degradation mechanism. The photocatalytic activity measured in three subsequent cycles showed good reusability as no significant loss in efficiency of dye degradation was observed.
es_ES
Patrocinador
dc.description.sponsorship
UTEM
UCh
FONDECYT
1151189
Basal Financing Program CONICYT
FB0807
Spanish MINECO projects PHENTOM
FIS2015-70862-P
Severo Ochoa
SEV-2013-0295
CERCA Programme/Generalitat de Catalunya