Inorganic-organic hybrids presenting high basic center content: SBA-15 incorporation, toxic metals sorption and energetic behavior

dc.creatorOliveira, FJVE
dc.creatorMelo, MA
dc.creatorAiroldi, C
dc.date2013
dc.dateMAR
dc.date2014-08-01T18:33:25Z
dc.date2015-11-26T17:05:14Z
dc.date2014-08-01T18:33:25Z
dc.date2015-11-26T17:05:14Z
dc.date.accessioned2018-03-28T23:53:35Z
dc.date.available2018-03-28T23:53:35Z
dc.identifierMaterials Research Bulletin. Pergamon-elsevier Science Ltd, v. 48, n. 3, n. 1045, n. 1056, 2013.
dc.identifier0025-5408
dc.identifierWOS:000315608400020
dc.identifier10.1016/j.materresbull.2012.11.099
dc.identifierhttp://www.repositorio.unicamp.br/jspui/handle/REPOSIP/80715
dc.identifierhttp://repositorio.unicamp.br/jspui/handle/REPOSIP/80715
dc.identifier.urihttp://repositorioslatinoamericanos.uchile.cl/handle/2250/1279535
dc.descriptionFundação de Amparo à Pesquisa do Estado de São Paulo (FAPESP)
dc.descriptionConselho Nacional de Desenvolvimento Científico e Tecnológico (CNPq)
dc.descriptionMesoporous SBA-15 samples were organofunctionalized with mono, di- and tri-aminosilanes that previously reacted with thiocarbamide to enhance the organic chains and attach nitrogen and sulfur basic centers to the surface of the solids. These new organosilanes were synthesized through a non-solvent approach to reduce both cost and hazardous wastes. The high affinities for both hard and soft Lewis acids due to the combination of nitrogen and sulfur atoms attached to the same pendant chain enabled favorable sorption capacities for Cu2+, Cd2+ and Pb2+ cations, with maximum capacities of 1.90, 3.48 and 5.30 mmol g(-1), respectively, for the most efficient mesoporous silica. Microcalorimetric investigations allowed the calculation of the thermodynamic data at the solid/liquid interface. All Gibbs energy are negative as expected for spontaneous cation/basic center interactions and the positive entropic values from 49 +/- 3 to 108 +/- 5 J K-1 mol(-1), also reinforced this favorable interactive process in heterogeneous system. The designed organosilanes covalently bonded to the inorganic siliceous skeleton can be suggested as new materials for toxic metal removal from a wastewater with high efficiency. (C) 2012 Elsevier Ltd. All rights reserved.
dc.description48
dc.description3
dc.description1045
dc.description1056
dc.descriptionFundação de Amparo à Pesquisa do Estado de São Paulo (FAPESP)
dc.descriptionConselho Nacional de Desenvolvimento Científico e Tecnológico (CNPq)
dc.descriptionFundação de Amparo à Pesquisa do Estado de São Paulo (FAPESP)
dc.descriptionConselho Nacional de Desenvolvimento Científico e Tecnológico (CNPq)
dc.languageen
dc.publisherPergamon-elsevier Science Ltd
dc.publisherOxford
dc.publisherInglaterra
dc.relationMaterials Research Bulletin
dc.relationMater. Res. Bull.
dc.rightsfechado
dc.rightshttp://www.elsevier.com/about/open-access/open-access-policies/article-posting-policy
dc.sourceWeb of Science
dc.subjectInorganic compounds
dc.subjectStructural materials
dc.subjectSurfaces
dc.subjectSol-gel chemistry
dc.subjectSurface properties
dc.subjectFunctionalized Mesoporous Silica
dc.subjectThermochemical Data
dc.subjectHeavy-metals
dc.subjectAdsorption
dc.subjectRemediation
dc.subjectSurface
dc.subjectCopper
dc.subjectWater
dc.subjectIons
dc.subjectThermodynamics
dc.titleInorganic-organic hybrids presenting high basic center content: SBA-15 incorporation, toxic metals sorption and energetic behavior
dc.typeArtículos de revistas


Este ítem pertenece a la siguiente institución