English   español  
Please use this identifier to cite or link to this item: http://hdl.handle.net/10261/232547
Share/Impact:
Statistics
logo share SHARE   Add this article to your Mendeley library MendeleyBASE
Visualizar otros formatos: MARC | Dublin Core | RDF | ORE | MODS | METS | DIDL | DATACITE
Exportar a otros formatos:

Title

Enhancing visible-light photocatalytic activity for overall water splitting in UiO-66 by controlling metal node composition

AuthorsMelillo, A.; Cabrero-Antonino, María; Navalón, Sergio; Álvaro Rodríguez, Mercedes; Ferrer, B.; García Gómez, Hermenegildo
Issue Date5-Dec-2020
PublisherElsevier BV
CitationApplied Catalysis B: Environmental 278: 119345 (2020)
AbstractThe photocatalytic activity of a series of five UiO-66 (M: Zr, Zr/Ti, Zr/Ce, Zr/Ce/Ti, Ce) materials for overall water splitting with generation of hydrogen and oxygen has been herein measured. The most efficient photocatalyst for the overall water splitting is the trimetallic MOF UiO-66(Zr/Ce/Ti) which achieves 230 μ mol ∙ g of H and 110 μ mol ∙ g of O upon UV light irradiation, and 210 μ mol ∙ g of H and 70 μ mol ∙ g of O under visible light irradiation. These productivity data indicate that a considerable percentage of its photocatalytic activity derives from the visible region of the spectrum (λ > 450 nm). The photocatalytic activity of trimetallic UiO-66(Zr/Ce/Ti) was maintained upon reuse. Kinetics of the charge separated state monitored by transient absorption spectroscopy shows similar deactivation profiles for the five UiO-66 samples, suggesting that it is the charge separation efficiency the main factor responsible for the differences in the photocatalytic activity. The use of methanol as sacrificial agent during the photocatalytic experiments indicated that the high photocatalytic efficiency for overall water splitting in UiO-66(Zr/Ce/Ti) derives from the favorable kinetics of oxygen evolution. These results show the potential of multimetallic metal-organic frameworks as solar photocatalysts by tuning light absorption towards the visible region.
Publisher version (URL)http://dx.doi.org/10.1016/j.apcatb.2020.119345
URIhttp://hdl.handle.net/10261/232547
Identifiersissn: 0926-3373
Appears in Collections:(ITQ) Artículos
Files in This Item:
File Description SizeFormat 
accesoRestringido.pdf15,38 kBAdobe PDFThumbnail
View/Open
Show full item record
Review this work
 


WARNING: Items in Digital.CSIC are protected by copyright, with all rights reserved, unless otherwise indicated.