Incorporation of Au and Ag nanostructures inside SiO2

Diaz C.; Valenzuela A.M.L.; Soto K.; Laguna-Bercero M.A.

dc.contributor.author	Diaz C.
dc.contributor.author	Valenzuela A.M.L.
dc.contributor.author	Soto K.
dc.contributor.author	Laguna-Bercero M.A.
dc.date.accessioned	2020-09-02T22:16:38Z
dc.date.available	2020-09-02T22:16:38Z
dc.date.issued	2019
dc.identifier	10.4067/S0717-97072019000304502
dc.identifier.citation	64, 3, 4502-4506
dc.identifier.issn	07179324
dc.identifier.uri	https://hdl.handle.net/20.500.12728/4270
dc.description	Incorporation of Au° inside SiO2 was achieved by a solid-state method from the pyrolysis of the composites (Chitosan)•(AuCl3)n•(SiO2)m and (PS-co-4-PVP)•(AuCl3)n•(SiO2)mSimilarly, the incorporation of Ag° inside SiO2 it was made from thermal treatment of the composites (Chitosan)•(AgNO3)n•(SiO2)m and (PS-co-4-PVP)•(AgNO3)n•(SiO2)m. The nature of the polymer controls the particle size for the Au/SiO2 composite, while that for the Ag/SiO2 both, polymer Chitosan and PS-co-4-PVP, produces similar particle size. In the case of the composite Ag/SiO2 the particle size as small as 5 nm were obtained. The 1:1 or 1:5 metal/polymer ratios, as well as the nature of the polymer in the macromolecular precursors (Chitosan)•(AuCl3)n•(SiO2)m and (PS-co-4-PVP)•(AuCl3)n•(SiO2)m influences the dispersion of the Au° nanostructures inside SiO2 matrix. The results are compared with those previously obtained for bimetallic composites Au/Ag//SiO2. A formation mechanism of the Au°/SiO2 and Ag°/SiO2 composites involving the combustion of the organic matter and the growth of the Au° and Ag° nanoparticles inside the holes, generated from the combustion process, is proposed. © 2019 Sociedad Chilena de Quimica. All rights reserved.
dc.language.iso	en
dc.publisher	Sociedad Chilena de Quimica
dc.subject	Composites
dc.subject	Gold nanoparticles
dc.subject	Silica
dc.subject	Silver nanoparticles
dc.title	Incorporation of Au and Ag nanostructures inside SiO2
dc.type	Article

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Incorporation of Au and Ag nanostructures inside SiO2

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