FACTORES QUE AFECTAN LA TEXTURA Y ESTRUCTURA DE Ti(R)-MCM-41
Studied was the effect surfactant removal and titanium content have on the structure and textural properties of Ti-MCM-41 mesoporous materials. The synthesized solids were characterized by N2 adsorption, X-ray fluorescence (FRX), X-ray diffraction (DRX), electronic microscopy of high resolution(HREM...
| Authors: | , , |
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| Format: | article |
| Status: | Published version |
| Publication Date: | 2001 |
| Country: | México |
| Institution: | UNIVERSIDAD DE GUANAJUATO |
| Repository: | Acta Universitaria |
| Language: | Spanish |
| OAI Identifier: | oai:www.actauniversitaria.ugto.mx:article/306 |
| Online Access: | https://www.actauniversitaria.ugto.mx/index.php/acta/article/view/306 |
| Access Level: | Open access |
| Keyword: | Ti-MCM-41 textura estructura remoción del surfactante. texture structure surfactant removal. |
| Summary: | Studied was the effect surfactant removal and titanium content have on the structure and textural properties of Ti-MCM-41 mesoporous materials. The synthesized solids were characterized by N2 adsorption, X-ray fluorescence (FRX), X-ray diffraction (DRX), electronic microscopy of high resolution(HREM), and FT-Raman and UV-vis diffuse reflectance spectroscopy (DRS). Between the two methods of surfactant removal studied, the application of a polar solvent (solution of 0.05 M H2SO4 in ethanol) was to be more effective in removing the surfactant and diminishing the destruction of mesoporous material during calcination. The samples treated by this method showed a more ordered hexagonal pore arrangement (HREM, XRD) and larger surface area. The effect of an increase in TiO2 content in synthesized solids translates itself into a significant decrease of the peak intensity characteristic of Ti- MCM-41 (2È = 2.2-2.5o) and textural properties (SBET pore volume), which indicates that during the synthesis it is not possible to incorporate more than 10 mol. % of TiO2 into the MCM-41 framework. |
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