Journal
MATERIALS
Volume 12, Issue 20, Pages -Publisher
MDPI
DOI: 10.3390/ma12203278
Keywords
catalysis; (ep)oxidation; silica beads; nanoparticles; functionalization; polyoxometalates; ionic grafting; organic solvent-free process
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Funding
- Region Languedoc Roussillon Midi Pyrenees (Region Occitanie)
- IUT Paul Sabatier
- Communaute d'Agglomeration Castres-Mazamet [15066786]
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Catalyzed organic solvent-free (ep)oxidation were achieved using H3PM12O40 (M = Mo or W) complexes ionically grafted on APTES-functionalized nano-silica beads obtained from straightforward method (APTES = aminopropyltriethoxysilane). Those catalysts have been extensively analyzed through morphological studies (Dynamic Light Scattering (DLS), TEM) and several spectroscopic qualitative (IR, multinuclear solid-state NMR) and quantitative (H-1 and P-31 solution NMR) methods. Interesting catalytic results were obtained for the epoxidation of cyclooctene, cyclohexene, limonene and oxidation of cyclohexanol with a lower [POM]/olefin ratio. The catalysts were found to be recyclable and reused during three runs with similar catalytic performances.
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