Abstract
Spinel ferrite has been widely applied in the field of catalytic oxidation with its high selectivity, magnetic separation, and strong chemical stability. In this work, a series of porous carbon supported Co doping spinel copper ferrite (CuxCo1-xFe2O4@PC) were prepared via impregnation method for the catalytic oxidation of vanillyl alcohol (VAL) to vanillin (VN). The optimized Cu0.4Co0.6Fe2O4 @PC exhibited a nanoparticle morphology with mesoporous structure and BET surface area of 553.3 m2·g−1. Results showed that the conversion of VAL (CVAL) can reach to 96 % with 81 % of VN selectivity (SVN) in the presence of Cu0.4Co0.6Fe2O4 @PC at 80 °C for 40 min. Reusability experiment displayed that the CVAL (89 %) and SVN (79 %) can still achieve 92.3 % and 96.6 % of the initial ones after being used for 3 times. Furthermore, a possible pathway for the oxidation of VAL via·OH and·O2- active substances was also proposed. The work presents a supported doping spinel with enhanced VAL oxidation performance, which may be expected to apply in the field of selective catalysis.
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