Hedgehog Shaped Microspheres Assembled by Mn2CuO4 Nanobelts Decorated on Graphene Oxide for Highly Efficient Sensing of Hydrogen Peroxide

Solvothermal method was used to synthesize a unique nanostructure with hedgehog shaped microspheres assembled by ordered Mn 2 CuO 4 nanobelts, which was characterized by SEM, TEM and XRD. These Mn 2 CuO 4 microspheres were loaded on graphene oxide (GO) support to form Mn 2 CuO 4 /GO nanocomposites, and its application for highly efficient sensing of hydrogen peroxide (H 2 O 2 ) was demonstrated. The CV and amperometry results indicated that Mn 2 CuO 4 /GO nanocomposites exhibited superior electrocatalytic performance over Mn 2 CuO 4 for H 2 O 2 detection. The developed sensor shows a high detection sensitivity (838.9 μA mM cm -2 ), a wide linear concentration range (0.5-2352 μM), and a low limit of detection (20 nM). In addition, the Mn 2 CuO 4 /GO based H 2 O 2 sensor possesses good reproducibility, stability, selectivity and effective sample application.