Abstract
Herein, a facile one-step reduction method was used to synthesize Cu@Cu 2 O aerogel to fabricate an electrochemical sensor for detection of hydrogen peroxide. Advanced techniques including X-ray powder diffractions (XRD), transmission electron micrographs (TEMs), field-emission scanning electron microscopy (FESEM) were utilized to characterize the structure of Cu@Cu 2 O aerogel. The results showed that the Cu@Cu 2 O aerogel is composed of Cu and Cu 2 O nanoparticles with a three-dimensional porous structure. The chronoamperometry method was implemented to evaluate the electrochemical performance of Cu@Cu 2 O/GCE (GCE=glassy carbon electrode) towards H 2 O 2 . Under optimal conditions, Cu@Cu 2 O/GCE showed a wide detection range (2∼860 μmol), a low detection limit (0.46 μM, S/ N = 3), a sensitivity of 1855.53 mA M − 1 cm −2 and a good selectivity. In addition, the electrochemical sensor based on Cu@Cu 2 O aerogel can be used for the determination of hydrogen peroxide in watery samples. .
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