Kinetic study of CTMA+ removal from the pores of the Ti-MCM-41 molecular sieve
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...
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| Principais autores: | , , , , , |
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| Formato: | article |
| Idioma: | English |
| Publicado em: |
Journal of Thermal Analysis and Calorimetry
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| Assuntos: | |
| Endereço do item: | https://repositorio.ufrn.br/handle/123456789/45411 |
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| 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 |
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