Wells–Dawson heteropoly acid encapsulated into the nanocages of SBA-16 as heterogeneous catalyst for the oxidation of olefins and alcohols

Wells–Dawson type 18-tungstophosphoric acid (H 6 P 2 W 18 O 62 ) as guest was encapsulated inside the nanocages of mesoporous SBA-16 host. The pore entrance of SBA-16 material was modified by silylating reagent to prevent the escape of encapsulated H 6 P 2 W 18 O 62 from the nanocages. The prepared...

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Bibliographic Details
Published in:Journal of porous materials 2016-02, Vol.23 (1), p.285-290
Main Authors: Masteri-Farahani, M., Najafi, Gh. R., Modarres, M., Taghvai-Nakhjiri, M.
Format: Article
Language:English
Subjects:
Alcohol
Alcohols
Alkenes
Catalysis
Catalytic activity
Characterization and Evaluation of Materials
Chemistry
Chemistry and Materials Science
Diffraction
Encapsulation
Epoxidation
Hydrogen peroxide
Nanostructure
Olefins
Oxidants
Oxidation
Physical Chemistry
Reagents
Recyclability
Transmission electron microscopy
X-ray diffraction
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Summary:Wells–Dawson type 18-tungstophosphoric acid (H 6 P 2 W 18 O 62 ) as guest was encapsulated inside the nanocages of mesoporous SBA-16 host. The pore entrance of SBA-16 material was modified by silylating reagent to prevent the escape of encapsulated H 6 P 2 W 18 O 62 from the nanocages. The prepared host–guest material was characterized by different physicochemical techniques. X-ray diffraction and transmission electron microscopy analyses indicated the retention of mesoporous structure of SBA-16 and well-dispersion of the H 6 P 2 W 18 O 62 into the nanocages of SBA-16. The obtained material exhibited high catalytic activity, stability, and recyclability in the epoxidation of olefins and oxidation of alcohols in the presence of H 2 O 2 as oxidant.
ISSN:1380-2224
1573-4854
DOI:10.1007/s10934-015-0080-0