A simple, microwave-assisted, strategy for producing Au/Ag concentrated sols by glucose reduction in water was developed. Ag-Au bimetallic nanoparticles stabilized by polyvinylpyrrolidone (PVP) were characterized and their catalytic activity was studied in the reduction of 4-nitrophenol with NaBH4 as a probe reaction. The Ag-Au nanoparticles were prepared by first optimizing the synthesis of Au colloid and then carrying out the deposition of a silver shell. Microwave heating has been shown to provide more homogeneous particle nucleation and shorter synthesis time than traditional heating. Prepared Au, Ag and Au/Ag nanocrystals function as effective catalysts for the reduction of p-nitrophenol in the presence of NaBH4, otherwise unfeasible if only the strong reducing agent NaBH4 is employed.

Microwave-assisted synthesis of Au, Ag and Au-Ag nanoparticles and their catalytic activities for the reduction of nitrophenol

ALBONETTI, STEFANIA;BLOSI, MAGDA;
2010

Abstract

A simple, microwave-assisted, strategy for producing Au/Ag concentrated sols by glucose reduction in water was developed. Ag-Au bimetallic nanoparticles stabilized by polyvinylpyrrolidone (PVP) were characterized and their catalytic activity was studied in the reduction of 4-nitrophenol with NaBH4 as a probe reaction. The Ag-Au nanoparticles were prepared by first optimizing the synthesis of Au colloid and then carrying out the deposition of a silver shell. Microwave heating has been shown to provide more homogeneous particle nucleation and shorter synthesis time than traditional heating. Prepared Au, Ag and Au/Ag nanocrystals function as effective catalysts for the reduction of p-nitrophenol in the presence of NaBH4, otherwise unfeasible if only the strong reducing agent NaBH4 is employed.
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624
S. Albonetti; M. Blosi; F. Gatti; A. Migliori; L. Ortolani; V. Morandi ; G. Baldi; M. Dondi
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Utilizza questo identificativo per citare o creare un link a questo documento: http://hdl.handle.net/11585/96238
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