Journal of Molecular Catalysis A: Chemical p. 534 - 541 (2017)
Update date:2022-08-17
Topics:
da Silva, Fernanda Parra
Gon?alves, Renato V.
Rossi, Liane M.
Magnetically recoverable copper oxide catalysts prepared by sol-immobilization method exhibited interesting properties for the allylic oxidation of cyclohexene with molecular oxygen as the sole oxidant. The catalysts were prepared by immobilization of pre-synthesized PVA (polyvinyl alcohol)-stabilized Cu2O nanoparticles (NPs) on a magnetically recoverable support; the catalyst was further oxidized to CuO NPs after calcination at 600?°C. Both catalysts can selectively oxidize cyclohexene through allylic oxidation to give 2-cyclohexene-1-one as the main product, but CuO was identified as the most active species providing 90% cyclohexene conversion and 96% selectivity for allylic products under 100?°C and 4?bar pressure of O2 for 6?h of reaction time. The catalysts were magnetically recovered without metal leaching and could be reused in at least six consecutive runs.
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