Kinetic study of CTMA+ removal from the pores of the Ti-MCM-41 molecular sieve

dc.contributor.authorMelo, Marcus Antonio de Freitas
dc.contributor.authorFontes, Maria do Socorro Braga
dc.contributor.authorMelo, Dulce Maria de Araújo
dc.contributor.authorBarros, Joana Maria de Farias
dc.contributor.authorBraga, Renata Martins
dc.contributor.authorFontes, Vilsinéia dos Anjos
dc.date.accessioned2021-12-16T17:22:04Z
dc.date.available2021-12-16T17:22:04Z
dc.date.issued2014
dc.description.resumoThermogravimetry analysis was used to study the thermal decomposition of Ti-MCM-41 to determine the best calcination conditions. Ti-MCM-41 molecular sieve was synthesized using a hydrothermal route in which Ti ions were incorporated into the pore channels of MCM-41 starting from a hydrogel method according to the following molar composition: 1.00 CTMABr:4.00 SiO2:X TiO2:1.00 Na2O:200.00 H2O. Physicochemical properties of samples were investigated using XRD, FTIR, and N2 adsorption– desorption to confirm the incorporation of TiO2 nanoparticles inside of MCM-41 mesoporous without destroying its structure. The high temperatures facilitate the rapid removal of the surfactant; however, it caused destruction of the MCM-41 structure by breaking the bonds of the silica tetrahedral structure. The procedures to obtain the apparent activation energies of CTMABr decomposition were based on the kinetic model proposed by Flynn-Wall using thermal analysis of data performed with heating rates 5, 10, and 20 C min-1pt_BR
dc.identifier.citationFONTES, Maria do Socorro Braga; MELO, Dulce Maria de Araújo; BARROS, Joana Maria de Farias; BRAGA, Renata Martins; MELO, Marcus Antonio de Freitas; FONTES, Vilsinéia dos Anjos. Kinetic study of CTMA+ removal from the pores of the Ti-MCM-41 molecular sieve. Journal of Thermal Analysis and Calorimetry, v. 119, p. 197-204, 2014. Disponível em: https://link.springer.com/article/10.1007%2Fs10973-014-4099-2. Acesso em: 01 set 2021.pt_BR
dc.identifier.doi10.1007/s10973-014-4099-2
dc.identifier.issn1572-8943
dc.identifier.urihttps://repositorio.ufrn.br/handle/123456789/45411
dc.languageenpt_BR
dc.publisherJournal of Thermal Analysis and Calorimetrypt_BR
dc.rightsAttribution 3.0 Brazil*
dc.rights.urihttp://creativecommons.org/licenses/by/3.0/br/*
dc.subjectTi-MCM-41pt_BR
dc.subjectMolecular sievept_BR
dc.subjectHydrothermal synthesispt_BR
dc.subjectKineticspt_BR
dc.titleKinetic study of CTMA+ removal from the pores of the Ti-MCM-41 molecular sievept_BR
dc.typearticlept_BR

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