Details
| Original language | English |
|---|---|
| Pages (from-to) | 24967-24974 |
| Number of pages | 8 |
| Journal | Journal of Physical Chemistry C |
| Volume | 115 |
| Issue number | 50 |
| Early online date | 1 Dec 2011 |
| Publication status | Published - 22 Dec 2011 |
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.
ASJC Scopus subject areas
- Materials Science(all)
- Electronic, Optical and Magnetic Materials
- Energy(all)
- General Energy
- Chemistry(all)
- Physical and Theoretical Chemistry
- Materials Science(all)
- Surfaces, Coatings and Films
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In: Journal of Physical Chemistry C, Vol. 115, No. 50, 22.12.2011, p. 24967-24974.
Research output: Contribution to journal › Article › Research › peer review
}
TY - JOUR
T1 - Ag@ZnO core-shell nanoparticles formed by the timely reduction of Ag+ ions and zinc acetate hydrolysis in N,N-dimethylformamide
T2 - Mechanism of growth and photocatalytic properties
AU - Aguirre, Matías E.
AU - Rodríguez, Hernán B.
AU - Román, Enrique San
AU - Feldhoff, Armin
AU - Grela, María A.
PY - 2011/12/22
Y1 - 2011/12/22
N2 - 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.
AB - 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.
UR - http://www.scopus.com/inward/record.url?scp=84857272960&partnerID=8YFLogxK
U2 - 10.1021/jp209117s
DO - 10.1021/jp209117s
M3 - Article
AN - SCOPUS:84857272960
VL - 115
SP - 24967
EP - 24974
JO - Journal of Physical Chemistry C
JF - Journal of Physical Chemistry C
SN - 1932-7447
IS - 50
ER -