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| In this paper, a novel manganese-iron oxide embedded carbon fibers (Mn2O3-Fe2O3/CFs) has been successfully prepared for the first time through electrospinning and calcination. A series of samples with various Mn/Fe molar ratios (1:0, 3:1, 1:1, 1:3, 0:1) were synthesized by the same way to optimize catalytic ability. Structural characterizations reveal that Mn2O3-Fe2O3/CFs possesses 3D net-like structure. Electrochemical measurements reveal that Mn2O3-Fe2O3/CFs (3:1) shows the best catalysis ability for hydrogen peroxide (H2O2) reduction and acquires better detection parameters (such as: the fast response time (< 2 s), wide linear range (0.01-15.4 mM), good stability, and surpassingly selective capability). Such excellent performances are attributed to the following three factors: (1) the high catalytic ability of the Mn phase in the composites; (2) the 3D net-like CFs with high electrical conductivity, large surface area and more exposed active sites; (3) the synergistic effect between Mn2O3 and Fe2O3. In addition, Mn2O3-Fe2O3/CFs (3:1) can be applied to the analysis of H2O2 in human serum samples with satisfactory results. |
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| Keywords:Manganese-iron composites; Electrospinning; Non-enzymatic Hydrogen peroxide detection |
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