Abstract
In this work, Co3O4 was synthesized by a simple hydrothermal and subsequent calcination treatment for electrochemical detection of H2O2. In order to improve the electrochemical performance of Co3O4, it is compounded with the carbon materials derived from cypress leaves, loofah sponge, and pine needles. The electrochemical tests suggested that Co3O4/loofah sponge-derived carbon showed higher electrochemical activity towards H2O2 than the other two composites. The sensor based on Co3O4/loofah sponge-derived carbon exhibited a broad linear range from 5.00 μM to 11.40 mM, with a sensitivity of 47.83 μA mM−1 cm−2 and a detection limit of 1.50 μM (S/N = 3). Thus, this novel nonenzymatic sensor had potential application in H2O2 detection.
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