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https://doi.org/10.1016/j.catcom.2019.03.015
Copy DOIJournal: Catalysis Communications | Publication Date: Mar 20, 2019 |
Citations: 32 |
First-row-transition-metal silica coated magnetite nanoparticles (MNPs), Fe3O4@SiO2-M2+ [M = Mn2+ (1), Co2+ (2), Cu2+ (3) or Zn2+ (4)], were evaluated as catalysts for the selective oxidation of cyclohexane to cyclohexanone and cyclohexanol. The catalytic reaction occurred under mild conditions, using microwave-assisted heating in added solvent-free medium producing water as the only by-product. The manganese (1) and copper (3) surface enriched silica-coated MNPs leaded to the highest yield of oxygenated products (24% and 21%, respectively) after 2 h at 80 °C using hydrogen peroxide as oxidant. These surface modified MNPs can be readily isolated by using an external magnet and no significant loss of activity is observed when reused up to 5 consecutive runs.
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