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dc.contributor.author
Granone, Luis Ignacio
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dc.contributor.author
Nikitin, Konstantin
dc.contributor.author
Emeline, Alexei
dc.contributor.author
Dillert, Ralf
dc.contributor.author
Bahnemann, Detlef W.
dc.date.available
2020-11-12T14:11:27Z
dc.date.issued
2019-05-09
dc.identifier.citation
Granone, Luis Ignacio; Nikitin, Konstantin; Emeline, Alexei; Dillert, Ralf; Bahnemann, Detlef W.; Effect of the degree of inversion on the photoelectrochemical activity of spinel ZnFe2O4; Multidisciplinary Digital Publishing Institute; Catalysts; 9; 5; 9-5-2019; 1-13
dc.identifier.issn
2073-4344
dc.identifier.uri
http://hdl.handle.net/11336/118251
dc.description.abstract
Physicochemical properties of spinel ZnFe2O4 (ZFO) are known to be strongly affected by the distribution of the cations within the oxygen lattice. In this work, the correlation between the degree of inversion, the electronic transitions, the work function, and the photoelectrochemical activity of ZFO was investigated. By room-temperature photoluminescence measurements, three electronic transitions at approximately 625, 547, and 464 nm (1.98, 2.27, and 2.67 eV, respectively) were observed for the samples with different cation distributions. The transitions at 625 and 547 nm were assigned to near-band-edge electron-hole recombination processes involving O2- 2p and Fe3+ 3d levels. The transition at 464 nm, which has a longer lifetime, was assigned to the relaxation of the excited states produced after electron excitations from O2- 2p to Zn2+ 4s levels. Thus, under illumination with wavelengths shorter than 464 nm, electron-hole pairs are produced in ZFO by two apparently independent mechanisms. Furthermore, the charge carriers generated by the O2- 2p to Zn2+ 4s electronic transition at 464 nm were found to have a higher incident photon-to-current efficiency than the ones generated by the O2- 2p to Fe3+ 3d electronic transition. As the degree of inversion of ZFO increases, the probability of a transition involving the Zn2+ 4s levels increases and the probability of a transition involving the Fe3+ 3d levels decreases. This effect contributes to the increase in the photoelectrochemical efficiency observed for the ZFO photoanodes having a larger cation distribution.
dc.format
application/pdf
dc.language.iso
eng
dc.publisher
Multidisciplinary Digital Publishing Institute
dc.rights
info:eu-repo/semantics/openAccess
dc.rights.uri
https://creativecommons.org/licenses/by/2.5/ar/
dc.subject
CATION DISTRIBUTION
dc.subject
DEGREE OF INVERSION
dc.subject
PHOTOELECTROCHEMICAL ACTIVITY
dc.subject
ZNFE2O4
dc.subject.classification
Físico-Química, Ciencia de los Polímeros, Electroquímica
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dc.subject.classification
Ciencias Químicas
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CIENCIAS NATURALES Y EXACTAS
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Nano-materiales
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Nanotecnología
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INGENIERÍAS Y TECNOLOGÍAS
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Otras Ciencias Químicas
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Ciencias Químicas
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CIENCIAS NATURALES Y EXACTAS
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dc.title
Effect of the degree of inversion on the photoelectrochemical activity of spinel ZnFe2O4
dc.type
info:eu-repo/semantics/article
dc.type
info:ar-repo/semantics/artículo
dc.type
info:eu-repo/semantics/publishedVersion
dc.date.updated
2020-04-24T16:05:02Z
dc.journal.volume
9
dc.journal.number
5
dc.journal.pagination
1-13
dc.journal.pais
Suiza
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dc.journal.ciudad
Basilea
dc.description.fil
Fil: Granone, Luis Ignacio. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Científico Tecnológico Conicet - Bahía Blanca. Planta Piloto de Ingeniería Química. Universidad Nacional del Sur. Planta Piloto de Ingeniería Química; Argentina. Leibniz Universitat Hannover.; Alemania
dc.description.fil
Fil: Nikitin, Konstantin. Saint-Petersburg State University, Ulyanovskaya; Alemania
dc.description.fil
Fil: Emeline, Alexei. Saint-Petersburg State University, Ulyanovskaya; Alemania
dc.description.fil
Fil: Dillert, Ralf. Leibniz Universitat Hannover.; Alemania
dc.description.fil
Fil: Bahnemann, Detlef W.. Saint-Petersburg State University, Ulyanovskaya; Alemania. Leibniz Universitat Hannover.; Alemania
dc.journal.title
Catalysts
dc.relation.alternativeid
info:eu-repo/semantics/altIdentifier/doi/http://dx.doi.org/10.3390/catal9050434
dc.relation.alternativeid
info:eu-repo/semantics/altIdentifier/url/https://www.mdpi.com/2073-4344/9/5/434
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