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Type: Artigo de periódico
Title: Au-zno Prepared By Simple In Situ Reduction And Spontaneous Of Gold Nanoparticles On The Surface Of The Layered Zinc Hydroxide Using A Novel One-pot Method
Author: Prolo Massola
Bruna Cristina; Pereira de Souza
Natasha Maiara; Frutuoso Stachack
Fernando Ferrari; Rodrigues da Silva Oliveira
Everton Willian; Germino
Jose Carlos; Terezo
Ailton Jose; Quites
Fernando Junior
Abstract: This work reports on a reproducible and simple approach to the synthesis of nanocomposites based on gold metal nanoparticles (AuNPs) and layered compounds. Layered zinc hydroxide (ZHL-layered), a layered inorganic material, was used as host for the deposition of the gold nanoparticles. It was demonstrated that gold nanoparticles were rapidly formed when ZHL-layered was added to the ethanol chloroauric acid solution at room temperature. In this system, the ethyl alcohol acted as a solvent of the gold precursor and as a reducing agent, where the Au (III) ions were mainly reduced via redox reaction between the metallic precursor and the solvent. Measurements from gas chromatography/mass spectrometry showed that the AuNPs are produced with the formation of acetaldehyde. X-ray powder diffraction (XRD) indicated that the AuNPs were adsorbed on the surface of the ZHL-layered support. The structural, morphologic and optical properties of the nanocomposites based on AuNPs and ZHL-layered (Au-ZHL) were also investigated. According to UV-vis spectroscopy and transmission electron microscopy (TEM), the resulting nanoparticles were homogeneous, spherically shaped and highly stable with no aggregation dispersed in the ZHL-layered. This simple method indicates that Au (III) ions can be easily reduced, without the use of external reducing agents, in the presence of ZHL-layered and ethyl alcohol. Finally, we also demonstrated that Au-ZHL nanocomposites can be employed as templates for the preparation of zinc oxide decorated with AuNPs (hereafter named as Au-ZnO) using phase transformation at lower temperatures. (C) 2015 Elsevier B.V. All rights reserved.
Subject: Photocatalytic Activity
Plasmon Resonance
Au/zno Nanoparticles
Sensing Devices
Citation: Au-zno Prepared By Simple In Situ Reduction And Spontaneous Of Gold Nanoparticles On The Surface Of The Layered Zinc Hydroxide Using A Novel One-pot Method. Elsevier Science Sa, v. 167, p. 152-159 Nov-2015.
Rights: embargo
Identifier DOI: 10.1016/j.matchemphys.2015.10.023
Date Issue: 2015
Appears in Collections:Unicamp - Artigos e Outros Documentos

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