Kinetic study of CTMA+ removal from the pores of the Ti-MCM-41 molecular sieve
| dc.contributor.author | Melo, Marcus Antonio de Freitas | |
| dc.contributor.author | Fontes, Maria do Socorro Braga | |
| dc.contributor.author | Melo, Dulce Maria de Araújo | |
| dc.contributor.author | Barros, Joana Maria de Farias | |
| dc.contributor.author | Braga, Renata Martins | |
| dc.contributor.author | Fontes, Vilsinéia dos Anjos | |
| dc.date.accessioned | 2021-12-16T17:22:04Z | |
| dc.date.available | 2021-12-16T17:22:04Z | |
| dc.date.issued | 2014 | |
| dc.description.resumo | Thermogravimetry 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-1 | pt_BR |
| dc.identifier.citation | FONTES, 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.doi | 10.1007/s10973-014-4099-2 | |
| dc.identifier.issn | 1572-8943 | |
| dc.identifier.uri | https://repositorio.ufrn.br/handle/123456789/45411 | |
| dc.language | en | pt_BR |
| dc.publisher | Journal of Thermal Analysis and Calorimetry | pt_BR |
| dc.rights | Attribution 3.0 Brazil | * |
| dc.rights.uri | http://creativecommons.org/licenses/by/3.0/br/ | * |
| dc.subject | Ti-MCM-41 | pt_BR |
| dc.subject | Molecular sieve | pt_BR |
| dc.subject | Hydrothermal synthesis | pt_BR |
| dc.subject | Kinetics | pt_BR |
| dc.title | Kinetic study of CTMA+ removal from the pores of the Ti-MCM-41 molecular sieve | pt_BR |
| dc.type | article | pt_BR |
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