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

dc.contributorUniversidade Estadual Paulista (Unesp)
dc.contributorUniversidade Federal do Rio Grande do Norte (UFRN)
dc.date.accessioned2014-05-20T15:21:22Z
dc.date.available2014-05-20T15:21:22Z
dc.date.created2014-05-20T15:21:22Z
dc.date.issued2001-01-01
dc.identifierJournal of Thermal Analysis and Calorimetry. Dordrecht: Kluwer Academic Publ, v. 64, n. 2, p. 801-805, 2001.
dc.identifier1418-2874
dc.identifierhttp://hdl.handle.net/11449/32521
dc.identifier10.1023/A:1011564916290
dc.identifierWOS:000168679600045
dc.identifier8460531302083773
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.
dc.languageeng
dc.publisherKluwer Academic Publ
dc.relationJournal of Thermal Analysis and Calorimetry
dc.rightsAcesso restrito
dc.sourceWeb of Science
dc.subjecthydrothermal synthesis
dc.subjectMCM-41
dc.subjectthermogravimetry
dc.titleThermogravimetric investigations during the synthesis of silica-based MCM-41
dc.typeArtículos de revistas


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