Self-organized inorganic-organic hybrids induced by silylating agents with phyllosilicate-like structure and the influence of the adsorption of cations

dc.creatorDa Fonseca, MG
dc.creatorBarone, JS
dc.creatorAiroldi, C
dc.date2000
dc.dateDEC
dc.date2014-12-02T16:26:44Z
dc.date2015-11-26T17:38:03Z
dc.date2014-12-02T16:26:44Z
dc.date2015-11-26T17:38:03Z
dc.date.accessioned2018-03-29T00:19:41Z
dc.date.available2018-03-29T00:19:41Z
dc.identifierClays And Clay Minerals. Clay Minerals Society, v. 48, n. 6, n. 638, n. 647, 2000.
dc.identifier0009-8604
dc.identifierWOS:000166162200005
dc.identifier10.1346/CCMN.2000.0480605
dc.identifierhttp://www.repositorio.unicamp.br/jspui/handle/REPOSIP/71396
dc.identifierhttp://www.repositorio.unicamp.br/handle/REPOSIP/71396
dc.identifierhttp://repositorio.unicamp.br/jspui/handle/REPOSIP/71396
dc.identifier.urihttp://repositorioslatinoamericanos.uchile.cl/handle/2250/1286109
dc.descriptionTwo analogous inorganic-organic hybrids with a phyllosilicate-like structure SILMg1 and SILMg2, containing 3-aminopropyl- and N-propylethylenediaminetrimethoxysilane were synthesized through a sol-gel process. These hybrids adsorbed divalent cations of cobalt, nickel, copper, and zinc from aqueous solution to give the effectiveness of adsorption capacities in the sequence Cu2+ > Zn2+ > Ni2+ > Co2+. SILMg1 has a higher capacity of adsorption than SILMg2. Elemental analysis, X-ray diffractometry, thermal analysis, infrared and nuclear magnetic resonance spectroscopies, and energy dispersive system microscopy characterized all hybrids. The proposed adsorption mechanism involves dissolution of the precursor matrix, formation of a phyllosilicate around the adsorbed ion, and a complexation of the cation by the amino-pendant groups in the interlayer. These new phyllosilicates are more crystalline than the original hybrids. The adsorption of Co2+ increases the interlayer distance to maximum values of 1.81 and 2.24 Angstrom for SILMg1 and SILMg2, respectively. Thermal analysis data showed a decrease of thermal stability with cation adsorption. Si-O-Si groups were detected by infrared spectroscopy in all hybrids and a band at 1384 cm(-1) was assigned to the nitrate counter anion, which indicates the participation of this ion in the sphere of coordination of the interlayer complexes. The photomicrographs obtained by scanning electron microscopy showed the organized distribution of the sheet structure for these synthesized phyllosilicates.
dc.descriptiono TEXTO COMPLETO DESTE ARTIGO, ESTARÁ DISPONÍVEL À PARTIR DE AGOSTO DE 2015.
dc.description48
dc.description6
dc.description638
dc.description647
dc.languageen
dc.publisherClay Minerals Society
dc.publisherBoulder
dc.publisherEUA
dc.relationClays And Clay Minerals
dc.relationClay Clay Min.
dc.rightsembargo
dc.sourceWeb of Science
dc.subjectadsorption
dc.subjectaminated surface
dc.subjectcomplexes
dc.subjection-exchange
dc.subjectmodified phyllosilicate
dc.subjectMagnesium Nickel Phyllosilicate
dc.subjectOctahedral Sheets
dc.subjectSmectites
dc.subjectReactivity
dc.subjectCatalysts
dc.subjectTalc
dc.titleSelf-organized inorganic-organic hybrids induced by silylating agents with phyllosilicate-like structure and the influence of the adsorption of cations
dc.typeArtículos de revistas


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