Thermogravimetric investigations during the synthesis of silica-based MCM-41

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dc.contributor.authorAraujo, S. A.
dc.contributor.authorIonashiro, Massao [UNESP]
dc.contributor.authorFernandes, V. J.
dc.contributor.authorAraujo, A. S.
dc.contributor.institutionUniversidade Estadual Paulista (Unesp)
dc.contributor.institutionUniversidade Federal do Rio Grande do Norte (UFRN)
dc.date.accessioned2014-05-20T15:21:22Z
dc.date.available2014-05-20T15:21:22Z
dc.date.issued2001-01-01
dc.description.abstractMCM-41 material was synthesized starting from hydrogel containing colloidal fumed silica, sodium silicate, cetyltetramethylammonium bromide (CTMABr) as surfactant, and distilled water as solvent. These reactants were mixed to obtain a gel with the following composition: 4SiO(2):1Na(2)O:1CTMABr:200H(2)O. The hydrogel with pH=14 was hydrothermally treated at 100 degreesC, for 4 days. Each day, the pH was measured, and then adjusted to 9.5-10 by using 30% acetic acid solution. Thermogravimetry was the main technique, which was used to monitor the participation of the surfactant on the MCM-41 nanophase, being possible to determine the temperature ranges relative to water desorption as well as the surfactant decomposition and silanol condensation.en
dc.description.affiliationUNESP, Inst Chem, BR-14801970 Ararquara, SP, Brazil
dc.description.affiliationUniv Fed Rio Grande Norte, Dept Chem, BR-59078970 Natal, RN, Brazil
dc.description.affiliationUnespUNESP, Inst Chem, BR-14801970 Ararquara, SP, Brazil
dc.format.extent801-805
dc.identifierhttp://dx.doi.org/10.1023/A:1011564916290
dc.identifier.citationJournal of Thermal Analysis and Calorimetry. Dordrecht: Kluwer Academic Publ, v. 64, n. 2, p. 801-805, 2001.
dc.identifier.doi10.1023/A:1011564916290
dc.identifier.issn1418-2874
dc.identifier.lattes8460531302083773
dc.identifier.urihttp://hdl.handle.net/11449/32521
dc.identifier.wosWOS:000168679600045
dc.language.isoeng
dc.publisherKluwer Academic Publ
dc.relation.ispartofJournal of Thermal Analysis and Calorimetry
dc.rights.accessRightsAcesso restrito
dc.sourceWeb of Science
dc.subjecthydrothermal synthesispt
dc.subjectMCM-41pt
dc.subjectthermogravimetrypt
dc.titleThermogravimetric investigations during the synthesis of silica-based MCM-41en
dc.typeArtigo
dcterms.licensehttp://www.springer.com/open+access/authors+rights
dcterms.rightsHolderKluwer Academic Publ
unesp.author.lattes8460531302083773
unesp.campusUniversidade Estadual Paulista (Unesp), Instituto de Química, Araraquarapt

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Artigos - Química Analítica - IQ