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Abstract:

A new synthetic route for the preparation of Ag-ZnO hybrid nanostructures under well-defined conditions using silver nitrate and zinc acetate in N,N-dimethylformamide as starting materials is presented. The solvent simultaneously behaves as a reducing agent for Ag + ions and provides the basic medium for zinc acetate hydrolysis at room temperature, with- out making resource of stabilizers and any kind of additives. As determined by electron microscopy studies, the prepared nanostructures have well-defined core-shell architectures, with a cover layer of ZnO protecting the Ag center from oxidation by external agents. Intermediates and final products were further characterized by FTIR, XRD, ICP-OES, and UV-vis absorption and luminescence spectroscopy. The change in the emission properties of ZnO as a result of the assemblage proves the strong interaction existing between the semiconductor and the metallic nucleus and points to an efficient electron transfer from ZnO to Ag. Accordingly, comparative photocatalytic experiments of ZnO andAg@ZnO nanostructures loaded with the chelating xanthene dye, 9-phenyl-2,3,7- trihidroxy-6-fluorone, confirm that the presence of Ag nanoparticles in the hybrid nanostructures serves to slow down charge recombination both under UV and visible light excitation. © 2011 American Chemical Society.

Registro:

Documento: Artículo
Título:Ag@ZnO core-shell nanoparticles formed by the timely reduction of Ag + ions and zinc acetate hydrolysis in N,N-dimethylformamide: Mechanism of growth and photocatalytic properties
Autor:Aguirre, M.E.; Rodríguez, H.B.; Román, E.S.; Feldhoff, A.; Grela, M.A.
Filiación:Departamento de Química, Universidad Nacional de Mar Del Plata, Funes 3350, B7602AYL Mar del Plata, Argentina
INQUIMAE/DQIAyQF, Facultad de Ciencias Exactas y Naturales, Universidad de Buenos Aires, Pabellón 2, 1428 Buenos Aires, Argentina
Institut für Physikalische Chemie und Elektrochemie, Leibniz Universität Hannover, Callinstraße 3-3, D-30167 Hannover, Germany
Palabras clave:Ag nanoparticle; Basic medium; Charge recombinations; Core-shell; Core-shell nanoparticles; Cover layers; Electron transfer; Emission properties; External agents; FTIR; Hybrid nanostructures; ICP-OES; Luminescence spectroscopy; N ,N-Dimethylformamide; Photo-catalytic; Photocatalytic property; Room temperature; Silver nitrates; Strong interaction; Synthetic routes; UV and visible light; UV-vis absorptions; XRD; Zinc acetate; ZnO; ZnO nanostructures; Dimethylformamide; Hybrid materials; Hydrolysis; Nanoparticles; Zinc compounds; Zinc oxide; Silver
Año:2011
Volumen:115
Número:50
Página de inicio:24967
Página de fin:24974
DOI: http://dx.doi.org/10.1021/jp209117s
Título revista:Journal of Physical Chemistry C
Título revista abreviado:J. Phys. Chem. C
ISSN:19327447
Registro:https://bibliotecadigital.exactas.uba.ar/collection/paper/document/paper_19327447_v115_n50_p24967_Aguirre

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Citas:

---------- APA ----------
Aguirre, M.E., Rodríguez, H.B., Román, E.S., Feldhoff, A. & Grela, M.A. (2011) . Ag@ZnO core-shell nanoparticles formed by the timely reduction of Ag + ions and zinc acetate hydrolysis in N,N-dimethylformamide: Mechanism of growth and photocatalytic properties. Journal of Physical Chemistry C, 115(50), 24967-24974.
http://dx.doi.org/10.1021/jp209117s
---------- CHICAGO ----------
Aguirre, M.E., Rodríguez, H.B., Román, E.S., Feldhoff, A., Grela, M.A. "Ag@ZnO core-shell nanoparticles formed by the timely reduction of Ag + ions and zinc acetate hydrolysis in N,N-dimethylformamide: Mechanism of growth and photocatalytic properties" . Journal of Physical Chemistry C 115, no. 50 (2011) : 24967-24974.
http://dx.doi.org/10.1021/jp209117s
---------- MLA ----------
Aguirre, M.E., Rodríguez, H.B., Román, E.S., Feldhoff, A., Grela, M.A. "Ag@ZnO core-shell nanoparticles formed by the timely reduction of Ag + ions and zinc acetate hydrolysis in N,N-dimethylformamide: Mechanism of growth and photocatalytic properties" . Journal of Physical Chemistry C, vol. 115, no. 50, 2011, pp. 24967-24974.
http://dx.doi.org/10.1021/jp209117s
---------- VANCOUVER ----------
Aguirre, M.E., Rodríguez, H.B., Román, E.S., Feldhoff, A., Grela, M.A. Ag@ZnO core-shell nanoparticles formed by the timely reduction of Ag + ions and zinc acetate hydrolysis in N,N-dimethylformamide: Mechanism of growth and photocatalytic properties. J. Phys. Chem. C. 2011;115(50):24967-24974.
http://dx.doi.org/10.1021/jp209117s