Determination of Hydrogen Peroxide by Electrochemiluminescence Using a Chitosan-graphene Composite Film Doped Cadmium-Tellurium Quantum Dot Modified Glassy Carbon Electrode

摘要

Here is reported the novel determination of hydrogen peroxide by electrochemiluminescence using a chitosan-graphene composite film doped cadmium-tellurium quantum dot modified glassy carbon electrode. The cadmium-tellurium quantum dots were studied by absorption and fluorescence spectroscopy. Scanning electron microscopy and electrochemical impedance spectroscopy were used to characterize the structure morphology of the composite matrix. The electrochemiluminescence emission was linear with the concentration of hydrogen peroxide in the range of 3.5x10(-7) to 1.1x10(-5)M with a determination limit of 2.1x10(-7)M. Furthermore, the modified electrode showed excellent reproducibility and stability.