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dc.contributor.author
Meichtry, Jorge Martin
dc.contributor.author
Levy, Ivana Karina
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Mohamed, Hanan H.
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Dillert, Ralf
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Bahnemann, Detlef W.
dc.contributor.author
Litter, Marta Irene
dc.date.available
2018-04-17T21:43:16Z
dc.date.issued
2015-12
dc.identifier.citation
Meichtry, Jorge Martin; Levy, Ivana Karina; Mohamed, Hanan H.; Dillert, Ralf; Bahnemann, Detlef W.; et al.; Mechanistic features of TiO2-heterogeneous photocatalysis of arsenic and uranyl nitrate in aqueous suspensions studied by the stopped flow technique; Wiley VCH Verlag; Chemphyschem; 17; 12-2015; 885-892
dc.identifier.issn
1439-4235
dc.identifier.uri
http://hdl.handle.net/11336/42398
dc.description.abstract
The dynamics of transfer of electrons stored in TiO2 nanoparticles to As(III), As(V) and uranyl nitrate in water has been investigated using the stopped flow technique. Suspensions of TiO2 nanoparticles with stored trapped electrons (etrap−) were mixed with solutions of acceptor species to evaluate the reactivity, following the temporal evolution of etrap− by the decrease of the absorbance at 600 nm. The results indicate that As(V) and As(III) cannot be reduced by etrap− under the present conditions. In addition, it was observed that the presence of As(V) and As(III) strongly modified the reaction rate between O2 and etrap−, with an increase of the rate when As(V) was present and a decrease in the presence of As(III). In contrast with the As system, U(VI) was observed to react easily with etrap− and U(IV) formation was observed spectroscopically at 650 nm. The possible competence of U(VI) and NO3− for their reduction by etrap− has been analyzed. The inhibition of the U(VI) photocatalytic reduction by O2 could be attributed to the fast oxidation of U(V) and/or U(IV).
dc.format
application/pdf
dc.language.iso
eng
dc.publisher
Wiley VCH Verlag
dc.rights
info:eu-repo/semantics/openAccess
dc.rights.uri
https://creativecommons.org/licenses/by-nc-sa/2.5/ar/
dc.subject
Photocatalysis
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Titanium Dioxide
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Nanoparticles
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Arsenic
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Otras Ciencias Químicas
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Ciencias Químicas
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CIENCIAS NATURALES Y EXACTAS
dc.title
Mechanistic features of TiO2-heterogeneous photocatalysis of arsenic and uranyl nitrate in aqueous suspensions studied by the stopped flow technique
dc.type
info:eu-repo/semantics/article
dc.type
info:ar-repo/semantics/artículo
dc.type
info:eu-repo/semantics/publishedVersion
dc.date.updated
2018-04-17T20:00:31Z
dc.journal.volume
17
dc.journal.pagination
885-892
dc.journal.pais
Alemania
dc.journal.ciudad
Weinheim
dc.description.fil
Fil: Meichtry, Jorge Martin. Comisión Nacional de Energía Atómica. Gerencia Química. CAC; Argentina. Consejo Nacional de Investigaciones Científicas y Técnicas; Argentina
dc.description.fil
Fil: Levy, Ivana Karina. Comisión Nacional de Energía Atómica. Gerencia Química. CAC; Argentina. Consejo Nacional de Investigaciones Científicas y Técnicas; Argentina
dc.description.fil
Fil: Mohamed, Hanan H.. Helwan University; Egipto
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Fil: Dillert, Ralf. Leibniz Universität Hannover; Alemania
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Fil: Bahnemann, Detlef W.. Leibniz Universität Hannover; Alemania. Saint-Petersburg State University; Rusia
dc.description.fil
Fil: Litter, Marta Irene. Consejo Nacional de Investigaciones Científicas y Técnicas; Argentina. Comisión Nacional de Energía Atómica. Gerencia Química. CAC; Argentina. Universidad Nacional de San Martín; Argentina
dc.journal.title
Chemphyschem
dc.relation.alternativeid
info:eu-repo/semantics/altIdentifier/doi/http://dx.doi.org/10.1002/cphc.201500949
dc.relation.alternativeid
info:eu-repo/semantics/altIdentifier/url/https://onlinelibrary.wiley.com/doi/abs/10.1002/cphc.201500949
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