Tailoring the structure, composition, optical properties and catalytic activity of Ag-Au nanoparticles by the galvanic replacement reaction
| Contribuinte(s) |
UNIVERSIDADE DE SÃO PAULO |
|---|---|
| Data(s) |
12/10/2013
12/10/2013
2012
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| Resumo |
This Letter reports on the synthesis of Ag-Au nanoparticles (NPs) with controlled structures and compositions via a galvanic replacement reaction between Ag NPs and AuCl4(aq)- followed by the investigation of their optical and catalytic properties. Our results showed the formation of porous walls, hollow interiors and increased Au content in the Ag-Au NPs as the volume of AuCl4(aq)- employed in the reaction was increased. These variations led to a red shift and broadening of the SPR peaks and an increase of up to 10.9-folds in the catalytic activity towards the reduction of 4-nitrophenol relative to Ag NPs. (C) 2012 Elsevier B.V. All rights reserved. FAPESP FAPESP [2011/06847-0] USP [11.1.25042.1.0] USP |
| Identificador |
CHEMICAL PHYSICS LETTERS, AMSTERDAM, v. 531, n. 6, pp. 188-192, APR 2, 2012 0009-2614 http://www.producao.usp.br/handle/BDPI/34229 10.1016/j.cplett.2012.02.039 |
| Idioma(s) |
eng |
| Publicador |
ELSEVIER SCIENCE BV AMSTERDAM |
| Relação |
CHEMICAL PHYSICS LETTERS |
| Direitos |
closedAccess Copyright ELSEVIER SCIENCE BV |
| Palavras-Chave | #SURFACE-ENHANCED RAMAN #SHAPE-CONTROLLED SYNTHESIS #OXYGEN REDUCTION #BIMETALLIC NANOCRYSTALS #SILVER NANOSTRUCTURES #GOLD NANOPARTICLES #PLASMON RESONANCE #SPECTROSCOPY #NANOMATERIALS #NANOALLOYS #CHEMISTRY, PHYSICAL #PHYSICS, ATOMIC, MOLECULAR & CHEMICAL |
| Tipo |
article original article publishedVersion |
