Preparation, characterization, and CuX2 and CoX2 (X = Cl-, Br-, ClO4-) adsorption behavior of a polyhedral oligomer silsesquioxane functionalized with an organic base

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dc.contributor.authorDias Filho, Newton Luiz
dc.contributor.authorMarangoni, Fabiane
dc.contributor.authorCosta, Reginaldo Mendonca
dc.contributor.institutionUniversidade Estadual Paulista (Unesp)
dc.date.accessioned2014-05-20T13:29:31Z
dc.date.available2014-05-20T13:29:31Z
dc.date.issued2007-09-01
dc.description.abstractIn this paper we report on the synthesis, characterization, and adsorption properties of the first 3-amino-1,2,4-triazole-modified porous silsesquioxane (ATPS). The isotherms of adsorption of MX2 (M = Cu(II), Co(II); X = Cl-, Br-, ClO4-) by ATPS were studied in ethanol and aqueous solutions at 298 K. The results showed that there is a good fit between the experimental data and the Langmuir isotherm. The adsorption capacity in both solvents followed the sequence Cu(II) >> Co(II). The lowest adsorption for Co(II) should be related to the largest hydration volume, which obstructs the adsorption capacity of the surface, and consequently causes a decrease in the number of cations adsorbed. For the salts with different anions the sequence was MCl2 > MBr2 > M(ClO4)2 in both solvents. The low affinity for M(ClO4)(2) toward the solid phase is a consequence of the poorer coordination ability of the ClO4-. Adsorptions from ethanol solutions were higher than those from aqueous solutions due to the higher polarity of water, which can more strongly solvate the solute and the basic sites on the surface. The following adsorption capacities (in mmol g(-1)) were determined: 0.24 (aq) and 0.84 (eth) for CuCl2, 0.09 (aq) and 0.16 (eth) for CuBr2, and 0.08 (aq) and 0.11 (eth) for Cu(ClO4)(2); 0.02 (aq) and 0.07 (eth) for CoCl2, 0.02 (aq) and 0.06 (eth) for CoBr2, and 0.01 (aq) and 0.05 (eth) for Co(ClO4)(2). (c) 2007 Elsevier B.V. All rights reserved.en
dc.description.affiliationUniv Estadual Paulista, UNESP, Dept Quim & Fis, BR-15385000 Ilha Solteira, SP, Brazil
dc.description.affiliationUnespUniv Estadual Paulista, UNESP, Dept Quim & Fis, BR-15385000 Ilha Solteira, SP, Brazil
dc.format.extent34-40
dc.identifierhttp://dx.doi.org/10.1016/j.jcis.2007.04.002
dc.identifier.citationJournal of Colloid and Interface Science. San Diego: Academic Press Inc. Elsevier B.V., v. 313, n. 1, p. 34-40, 2007.
dc.identifier.doi10.1016/j.jcis.2007.04.002
dc.identifier.issn0021-9797
dc.identifier.lattes1509480515046572
dc.identifier.urihttp://hdl.handle.net/11449/9974
dc.identifier.wosWOS:000248351900006
dc.language.isoeng
dc.publisherElsevier B.V.
dc.relation.ispartofJournal of Colloid and Interface Science
dc.relation.ispartofjcr5.091
dc.relation.ispartofsjr1,221
dc.rights.accessRightsAcesso restrito
dc.sourceWeb of Science
dc.subjectsilsesquioxanept
dc.subjectmodified silsesquioxanept
dc.subjectadsorptionpt
dc.subjectisotherms of adsorptionpt
dc.titlePreparation, characterization, and CuX2 and CoX2 (X = Cl-, Br-, ClO4-) adsorption behavior of a polyhedral oligomer silsesquioxane functionalized with an organic baseen
dc.typeArtigo
dcterms.licensehttp://www.elsevier.com/about/open-access/open-access-policies/article-posting-policy
dcterms.rightsHolderElsevier B.V.
unesp.author.lattes1509480515046572
unesp.campusUniversidade Estadual Paulista (Unesp), Faculdade de Engenharia, Ilha Solteirapt

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Artigos - Física e Química - FEIS