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rare earth ce- and nd-doped spinel nickel ferrites as effective heterogeneous catalysts in the (ep)oxidation of alkenes
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نویسنده
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adam mohamed shaker s. ,hafez aly m. ,khalaf mai m.
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منبع
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journal of the iranian chemical society - 2020 - دوره : 17 - شماره : 12 - صفحه:3237 -3250
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چکیده
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Cerium (ce)- and neodymium (nd)-doped spinel nickel ferrites catalysts system were synthesized using a cost-effective sol–gel route. the as-prepared nickel ferrites and its doped ce and nd nanomaterials were characterized in terms of fourier transform infrared spectrophotometry, x-ray diffraction, field emission scanning electron microscopy, energy-dispersive x-ray spectroscopy, transmission electron microscopy, selected area diffraction pattern, zeta potential and magnetism techniques. their catalytic potential was examined in the (ep)oxidation of 1,2-cyclooctene by using hydrogen peroxide (h2o2) or tert-butylhydroperoxide (t-buooh). optimization of various parameters, including solvent, oxidant and catalyst type revealed that chloroform (chcl3) or 1,2-dichloroethane as a solvent and t-buooh as an oxidant were found to be the best choice for this catalytic system. the catalytic efficiency was found as nd–nife2o4 > ce–nife2o4 > nife2o4. further, the applied nanocatalysts could be easily renovated and exhibited high catalytic reactivity for 5 times of recycling experiments with long-time durability. a reasonable discussion of the mechanism reaction reinforced the action of these spinel catalysts.
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کلیدواژه
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nickel ferrite ,cerium- and neodymium-doped ,nanoparticles ,catalysis ,(ep)oxidation
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آدرس
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king faisal university, college of science, department of chemistry, saudi arabia. sohag university, faculty of science, chemistry department, egypt, king faisal university, college of science, department of chemistry, saudi arabia, king faisal university, college of science, department of chemistry, saudi arabia. sohag university, faculty of science, chemistry department, egypt
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Authors
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