Charged silsesquioxane used as a vehicle for gold nanoparticles to perform the synthesis of catalyst xerogels

dc.creatorNunes, MR
dc.creatorGushikem, Y
dc.creatorLanders, R
dc.creatorDupont, J
dc.creatorCosta, TMH
dc.creatorBenvenutti, EV
dc.date2012
dc.dateAUG
dc.date2014-07-30T16:52:07Z
dc.date2015-11-26T16:37:49Z
dc.date2014-07-30T16:52:07Z
dc.date2015-11-26T16:37:49Z
dc.date.accessioned2018-03-28T23:21:00Z
dc.date.available2018-03-28T23:21:00Z
dc.identifierJournal Of Sol-gel Science And Technology. Springer, v. 63, n. 2, n. 258, n. 265, 2012.
dc.identifier0928-0707
dc.identifierWOS:000306846700010
dc.identifier10.1007/s10971-012-2696-8
dc.identifierhttp://www.repositorio.unicamp.br/jspui/handle/REPOSIP/62939
dc.identifierhttp://repositorio.unicamp.br/jspui/handle/REPOSIP/62939
dc.identifier.urihttp://repositorioslatinoamericanos.uchile.cl/handle/2250/1272122
dc.descriptionConselho Nacional de Desenvolvimento Científico e Tecnológico (CNPq)
dc.descriptionThe water soluble charged silsesquioxane that contains the bridged 1,4-diazoniabicyclo[2.2.2]octane chloride group, was used as stabilizing agent and size controller in the synthesis of gold nanoparticles smaller than 15 nm in aqueous medium. The gold nanoparticle dispersion was converted in solid powder form by evaporation. This powder presented organized structure imposed by the presence of charged organic group, similar to organized structure already observed for pure silsesquioxane. The gold nanoparticles in solid powder form presented high storage stability for several months, at ambient conditions, and can be completely redispersed in water again. After redispersion, the optical properties of gold nanoparticles, observed by ultra-violet and visible spectroscopy, and their morphological characteristics, investigated by transmission electron microscopy, are preserved. The gold nanoparticle aqueous dispersion was used as a vehicle of nanoparticles in the synthesis of sol-gel silica based hybrid material. This xerogel was characterized by N-2 adsorption-desorption isotherms, showing 260 m(2)g(-1), and it was applied in a satisfactory way as catalyst for p-nitrophenol reduction to p-aminephenol.
dc.description63
dc.description2
dc.description258
dc.description265
dc.descriptionConselho Nacional de Desenvolvimento Científico e Tecnológico (CNPq)
dc.descriptionFundacao de Amparo a Pesquisa do Estado do Rio Grande do Sul
dc.descriptionCoordenacao de Aperfeicoamento Pessoal de Nivel Superior
dc.descriptionConselho Nacional de Desenvolvimento Científico e Tecnológico (CNPq)
dc.languageen
dc.publisherSpringer
dc.publisherDordrecht
dc.publisherHolanda
dc.relationJournal Of Sol-gel Science And Technology
dc.relationJ. Sol-Gel Sci. Technol.
dc.rightsfechado
dc.rightshttp://www.springer.com/open+access/authors+rights?SGWID=0-176704-12-683201-0
dc.sourceWeb of Science
dc.subjectMetal nanoparticle powder
dc.subjectIonic silsesquioxane
dc.subjectCharged silane
dc.subjectGold nanoparticle storage
dc.subjectGold xerogel catalyst
dc.subjectSol-gel Method
dc.subjectAu Nanoparticles
dc.subjectHybrid Xerogels
dc.subjectSilica
dc.subjectReduction
dc.subject4-nitrophenol
dc.subjectComposites
dc.subjectBiosensors
dc.subjectParticles
dc.subjectFilms
dc.titleCharged silsesquioxane used as a vehicle for gold nanoparticles to perform the synthesis of catalyst xerogels
dc.typeArtículos de revistas


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