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Synthesis of titanosilicate ETS-10 in presence of cetyltrimethylammonium bromide
The titanosilicate ETS-10 has been hydrothermally synthesized at 463 K for 3 days from the gels of molar composition 1.0 Na 2O–0.2 TiO 2–0.6 KF–1.28 HCl– xC 16TMAB–1.49 SiO 2–39.5 H 2O, where C 16TMAB (cetyltrimethylammonium bromide) is shape-directing agent (template surfactant) and x = 0.05, 0.11,...
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Published in: | Microporous and mesoporous materials 2008-07, Vol.112 (1), p.425-431 |
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Main Authors: | , , , , |
Format: | Article |
Language: | English |
Subjects: | |
Citations: | Items that this one cites Items that cite this one |
Online Access: | Get full text |
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Summary: | The titanosilicate ETS-10 has been hydrothermally synthesized at 463
K for 3 days from the gels of molar composition 1.0 Na
2O–0.2 TiO
2–0.6 KF–1.28 HCl–
xC
16TMAB–1.49 SiO
2–39.5 H
2O, where C
16TMAB (cetyltrimethylammonium bromide) is shape-directing agent (template surfactant) and
x
=
0.05, 0.11, 0.20 and 0.30
moles. The effect of templating surfactant micelles on the crystallization and purity of ETS-10, on its crystallization field, the kinetics of crystallization and on the thermal stability of the structure is investigated. All the samples were characterized using X-ray diffraction, SEM, thermal analysis (TGA–DTG–DSC), nitrogen sorption and hpdec MAS
13C-NMR techniques. The characterization results suggested that the nucleation time, crystal growth rate, morphology, the range of pH, the crystallization field and the thermal stability of the final ETS-10 products were dependant on the presence of surfactant C
16TMAB as structure template in the alkaline silica–titania cogel. The ETS-10 is essentially microporous with a small mesoporous population. |
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ISSN: | 1387-1811 1873-3093 |
DOI: | 10.1016/j.micromeso.2007.10.019 |