Novel Nonenzymatic Hydrogen Peroxide Sensor Based on Ag/Cu2O Nanocomposites

The nanocomposites of Ag nanoparticles supported on Cu2O were prepared and used for fabricating a novel nonenzymatic H2O2 sensor. The morphology and composition of the nanocomposites were characterized using the scanning electron microscope (SEM), transmission electron microscope (TEM), energy-dispersive X-ray spectrum (EDX) and X-ray diffraction spectrum (XRD). The electrochemical investigations indicate that the sensor possesses an excellent performance toward H2O2. The linear range is estimated to be from 2.0M to 13.0mM with a sensitivity of 88.9AmM(-1)cm(-2), a response time of 3s and a low detection limit of 0.7M at a signal-to-noise ratio of 3. Additionally, the sensor exhibits good anti-interference.