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dc.contributor.CRUESPUNIVERSIDADE DE ESTADUAL DE CAMPINASpt_BR
dc.typeArtigo de periódicopt_BR
dc.titleIon-exchange Properties Of Imidazolium-grafted Sba-15 Toward Aucl4(-) Anions And Their Conversion Into Supported Gold Nanoparticles.pt_BR
dc.contributor.authorFattori, Nataliapt_BR
dc.contributor.authorMaroneze, Camila Mpt_BR
dc.contributor.authorda Costa, Luiz Ppt_BR
dc.contributor.authorStrauss, Mathiaspt_BR
dc.contributor.authorSigoli, Fernando Apt_BR
dc.contributor.authorMazali, Italo Opt_BR
dc.contributor.authorGushikem, Yoshitakapt_BR
unicamp.authorNatalia Fattori, Institute of Chemistry, University of Campinas (UNICAMP), Campinas, São Paulo (SP), Brazil.pt_BR
unicamp.author.externalCamila M Maroneze,pt
unicamp.author.externalLuiz P da Costa,pt
unicamp.author.externalMathias Strauss,pt
unicamp.author.externalFernando A Sigoli,pt
unicamp.author.externalItalo O Mazali,pt
unicamp.author.externalYoshitaka Gushikem,pt
dc.description.abstractImidazolium groups were successfully prepared and grafted on the surface of SBA-15 mesoporous silica. The ion-exchange properties of the functionalized porous solid (SBA-15/R(+)Cl(-)) toward AuCl(4)(-) anions were evaluated through an ion-exchange isotherm. The calculated values of the equilibrium constant (log β = 4.47) and the effective ion-exchange capacity (t(Q) = 0.79 mmol g(-1)) indicate that the AuCl(4)(-) species can be loaded and strongly retained on the functionalized surface as counterions of the imidazolium groups. Subsequently, solids containing different amounts of AuCl(4)(-) ions were submitted to a chemical reduction process with NaBH(4), converting the anionic gold species into supported gold nanoparticles. The plasmon resonance bands, the X-ray diffraction patterns, and transmission electron microscopy images of the supported gold nanoparticles before and after thermal treatment at 973 K indicate that the metal nanostructures are highly dispersed and stabilized by the host environment.en
dc.relation.ispartofLangmuir : The Acs Journal Of Surfaces And Colloidspt_BR
dc.relation.ispartofabbreviationLangmuirpt_BR
dc.date.issued2012-Julpt_BR
dc.identifier.citationLangmuir : The Acs Journal Of Surfaces And Colloids. v. 28, n. 27, p. 10281-8, 2012-Jul.pt_BR
dc.language.isoengpt_BR
dc.description.volume28pt_BR
dc.description.firstpage10281-8pt_BR
dc.rightsfechadopt_BR
dc.rights.holderpt_BR
dc.sourcePubMedpt_BR
dc.identifier.issn1520-5827pt_BR
dc.identifier.doi10.1021/la301374zpt_BR
dc.identifier.urlhttp://www.ncbi.nlm.nih.gov/pubmed/22697479pt_BR
dc.date.available2015-11-27T13:28:37Z-
dc.date.accessioned2015-11-27T13:28:37Z-
dc.description.provenanceMade available in DSpace on 2015-11-27T13:28:37Z (GMT). No. of bitstreams: 1 pmed_22697479.pdf: 1394800 bytes, checksum: 3337390a2240375efd0d3888eefdfd52 (MD5) Previous issue date: 2012en
dc.identifier.urihttp://repositorio.unicamp.br/jspui/handle/REPOSIP/200055-
dc.identifier.idPubmed22697479pt_BR
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