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In situ growth of Cu2+1O (Cu2O with metal excess defects) was achieved through a facile hydrothermal process by employing porous Cu foam (CF) as substrate and the precursor, meanwhile, graphene nanosheets (GN) were deposited onto the Cu2+1O/Cu foam substrate. The GN/Cu2+1O/CF hybrid electrode provides a large accessible surface area, and contact between GN/Cu2+1O and current collector (Cu foam) with good conductivity facilitated electron/ion transport. When being used as a potential biosensor for nonenzyme glucose detection, cyclic voltammetry (CV) and amperometric electrochemical method to evaluate the electrocatalytic performance of GN/Cu2+1O/CF, and the GN/Cu2+1O/CF hybrid electrode exhibits multistage linear detection ranges with high sensitivity (3.076 mA mM−1 cm−2) and the detection limit is 5 μM. Furthermore, the GN/Cu2+1O/CF electrode also presented excellent repeatability, stability and reproducibility and selectivity. The design of GN/Cu2+1O/CF hybrid electrode provided a useful strategy for design electrochemistry non-enzymatic biosensors.

Cu2+1O/graphene nanosheets supported on three dimensional copper foam for sensitive and efficient non-enzymatic detection of glucose

Cu₂₊₁O/graphene nanosheets supported on three dimensional copper foam for sensitive and efficient non-enzymatic detection of glucose