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Study of silver adsorption on montmorillonite

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


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