Abstract
Engelhard titanosilicate number 10 (ETS-10) was synthesized using titanium(IV) fluoride as the titanium source, both with and without the organic additive tetramethylammonium chloride. Compared with TiCl 3 and TiCl 4, which are commonly used in the synthesis of ETS-10, TiF 4 is not sensitive to moisture in the ambient air, and therefore, its use makes the preparation of the synthesis gels more convenient and simpler. Pure ETS-10 was obtained with TiF 4 by heating at 200°C for 168 h both with and without the organic additive. For comparison, another convenient Ti source, i.e. P25, a mixture of anatase and rutile, was used. X-ray pure ETS-10 was obtained by heating at 200°C for 42 h, whereas heating for 168 h produced pure ETS-4. The ETS-10 samples obtained with TiF 4 and P25 were thoroughly characterized by powder X-ray diffractometry, scanning electron microscopy, thermal analysis, n-hexane adsorption, diffuse reflectance UV/VIS, FT-IR spectroscopy and solid state 29Si, 19F MAS NMR.
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