We found a match
Your institution may have rights to this item. Sign in to continue.
- Title
Oxidation of Cyclohexene with H<sub>2</sub>O<sub>2</sub> Catalyzed by Vanadium Based Polyoxometalates Doped Modified Clays as Green Catalysts.
- Authors
Boudjema, S.; Rabah, H.; Choukchou-Braham, A.
- Abstract
The catalytic performance of supported heteropolyacids in various liquid-solid and gas-solid heterogeneous reactions may be affected by the choice of support and/or the method of heteropolyacid deposition. Vanadium substituted polyphosphomolybdate with the Keggin structure H4[PVMo11O40]·13H2O (PVMo) was dispersed throughout acid activated bentonite (clay from Hammam Boughrara, Maghnia, Algeria). A series of catalysts were prepared via modified impregnation. Modified preparation method employed ultrasonication as a means of the dispersion homogenization, followed by freeze-drying. The catalysts were characterized by the Brunauer-Emmett-Teller, the Fourier transform infrared, and 31P solid-state magic angle spinning-NMR spectroscopy. The catalytic performance of PVMo/Hmont was evaluated in the oxidation of cyclohexene. Intact Keggin anions were preserved on Hmont after deposition aided by ultrasonication. The obtained results showed that a better catalytic activity can be obtained with PVMo/bentonite (98% of conversion and 89% of cyclohexene oxide), by drop addition of H2O2, for 3 h.
- Subjects
CYCLOHEXENE; HYDROGEN peroxide; OXIDATION; VANADIUM catalysts; POLYOXOMETALATES; DOPED semiconductors; CLAY
- Publication
Acta Physica Polonica: A, 2017, Vol 132, Issue 3, p469
- ISSN
0587-4246
- Publication type
Article
- DOI
10.12693/APhysPolA.132.469