Ti-MCM-41 catalysts prepared by post-synthesis methods

Ti-MCM-41 catalysts were prepared incorporating Ti by post-synthesis methods: wetness and wet impregnation of MCM-41 mesoporous solid. The samples were characterized by XRD at low angle, UV–vis DRS, Raman spectroscopy, BET, ICP and colorimetry. The results were compared with those obtained for Ti-MC...

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Bibliographic Details
Published in:Catalysis today 2008-04, Vol.133, p.632-638
Main Authors: Marino, Damián, Gallegos, Norma G., Bengoa, José F., Alvarez, Ana M., Cagnoli, María V., Casuscelli, Sandra G., Herrero, Eduardo R., Marchetti, Sergio G.
Format: Article
Language:English
Subjects:
Limonene epoxidation
Post-synthesis methods
Ti-MCM-41
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Summary:Ti-MCM-41 catalysts were prepared incorporating Ti by post-synthesis methods: wetness and wet impregnation of MCM-41 mesoporous solid. The samples were characterized by XRD at low angle, UV–vis DRS, Raman spectroscopy, BET, ICP and colorimetry. The results were compared with those obtained for Ti-MCM-41 hydrotermically prepared. All catalysts were tested in the limonene epoxidation with H 2O 2. Three kinds of Ti sites were observed in post-synthesis catalysts which were different from that found in the hydrothermal Ti-MCM-41. These structural differences do not produce important changes in the catalytic activity, instead a slight decrease in the epoxide selectivity can be observed. The catalysts prepared by post-synthesis methods are promising in the limonene epoxidation with H 2O 2 since these methods are simple and reproducible.
ISSN:0920-5861
1873-4308
DOI:10.1016/j.cattod.2007.12.111