Show simple item record

dc.contributor.authorPraus, Petr
dc.contributor.authorTuricová, Martina
dc.contributor.authorValášková, Marta
dc.date.accessioned2008-06-09T06:48:59Z
dc.date.available2008-06-09T06:48:59Z
dc.date.issued2008
dc.identifier.citationJournal of the Brazilian Chemical Society. 2008, vol. 19, no. 3, p. 549-556.en
dc.identifier.issn0103-5053
dc.identifier.issn1678-4790
dc.identifier.urihttp://hdl.handle.net/10084/65131
dc.description.abstractIn this study Ag+ adsorption on Na+-rich montmorillonite (MMT) type Wyoming was studied. Adsorption data were fitted with several common isotherms but the best regression parameters were obtained for Langmuir model. It indicates that Ag+ was adsorbed on the MMT surface forming a monolayer. By adsorption of small amounts of Ag+ enlargement of the specific surface area (SSA) of micro- (r = 0.4-0.5 nm) and mesopores (r = 1.5-3 nm) was found. Intercalation of Ag+ into MMT was observed using X-ray diffraction (XRD). With increasing concentration of the silver nitrate solutions the content of Ag+ in MMT increased and the layered MMT structure gradually collapsed and exfoliated. The MMT samples saturated with Ag+ were treated with the sodium borohydride solutions to produce Ag0. The mean size of the Ag0crystallites of L111 = 8.5(1) nm was estimated. The metal silver nanoparticles are assumed to be located at the layer surface and crystal edges of MMT.en
dc.format.extent420682 bytescs
dc.format.mimetypeapplication/pdfcs
dc.language.isoenen
dc.publisherSociedade Brasileira de Químicaen
dc.relation.ispartofseriesJournal of the Brazilian Chemical Societyen
dc.relation.urihttp://dx.doi.org/10.1590/S0103-50532008000300025en
dc.rightsAll the content of the journal, except where otherwise noted, is licensed under a Creative Commons License.
dc.rights.urihttp://creativecommons.org/licenses/by-nc/3.0/
dc.subjectadsorptionen
dc.subjectintercalationen
dc.subjectsilveren
dc.subjectmontmorilloniteen
dc.subjectnanoparticlesen
dc.titleStudy of silver adsorption on montmorilloniteen
dc.typearticleen
dc.identifier.locationNení ve fondu ÚKen
dc.description.abstract-enNeste trabalho foi estudada a adsorção de Ag+ sobre montmorilonita (MMT) do tipo Wyoming rica em Na+. Os dados de adsorção foram ajustados de acordo com várias isotermas comuns, mas os melhores parâmetros de regressão foram obtidos pelo modelo de Langmuir, indicando que Ag+ foi adsorvido na superfície de MMT formando monocamadas. A adsorção de pequenas quantidades de Ag+ promoveu o aumento da área superficial específica (SSA) de micro (r = 0.4-0.5 nm) a mesoporos (r = 1.5-3 nm). A intercalação de Ag+ em MMT foi observada por difração de raios-X (XRD). Com o aumento da concentração de soluções de nitrato de prata, a quantidade de Ag+ em MMT também aumentou e a estrutura em camadas gradualmente sofreu colapso e esfoliação. As amostras de MTT saturadas com Ag+ foram tratadas com solução de boro hidreto de sódio para produzir Ag0. Foi estimado um tamanho médio de L111 = 8.5(1) nm dos cristalitos de Ag0. As nanopartículas de prata metálica ficaram localizadas na superfície e nas bordas dos cristais de MMT.en
dc.identifier.doi10.1590/S0103-50532008000300025
dc.rights.accessopenAccess
dc.type.versionpublishedVersion
dc.identifier.wos000256096300025


Files in this item

This item appears in the following Collection(s)

Show simple item record

All the content of the journal, except where otherwise noted, is licensed under a Creative Commons License.
Except where otherwise noted, this item's license is described as All the content of the journal, except where otherwise noted, is licensed under a Creative Commons License.