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(Reference retrieved automatically from Google Scholar through information on FAPESP grant and its corresponding number as mentioned in the publication by the authors.)

Tailoring the structure, composition, optical properties and catalytic activity of Ag-Au nanoparticles by the galvanic replacement reaction

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Author(s):
Petri, Marcos V. [1] ; Ando, Romulo A. [1] ; Camargo, Pedro H. C. [1]
Total Authors: 3
Affiliation:
[1] Univ Sao Paulo, Inst Quim, Dept Quim Fundamental, BR-05508000 Sao Paulo - Brazil
Total Affiliations: 1
Document type: Journal article
Source: Chemical Physics Letters; v. 531, p. 188-192, 2012.
Web of Science Citations: 35
Abstract

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. (AU)

FAPESP's process: 11/06847-0 - Multimetallic nanostructures with hollow interiors and well-defined sizes, shapes and compositions
Grantee:Pedro Henrique Cury Camargo
Support Opportunities: Regular Research Grants