Fabrication of Cu2O/rGO Hydrogel Film and its Application as Electrochemical Hydrogen Peroxide Sensor

The exploration of graphene-based electrochemical sensors has aroused intensive interest in application research. Here, we report the decoration of a reduced graphene oxide hydrogel film with Cu 2 O through a facile electrodeposition method and show that the as-prepared Cu 2 O/graphene hydrogel film can be directly utilized as an electrochemical H 2 O 2 sensor. The morphology and structure of the hydrogel composite are characterized, and the optimal electrodeposition time is determined. The graphene/Cu 2 O hydrogel film acting as a H 2 O 2 sensor exhibits high electrochemical sensing properties in terms of response, detection limit and selectivity. The present study could expand the potential of graphene hydrogel materials in the fields of sensors and biosensors.