Self-Assembled Prussian Blue Nanoparticles Based Electrochemical Sensor for High Sensitive Determination of H2O2 in Acidic Media

In this paper, self-assembled Prussian blue nanoparticles (PBNPs) on carbon ceramic electrode (CCE) were developed as a high sensitive hydrogen peroxide (H2O2) electrochemical sensor. The PBNPs film was prepared by a simple dipping method. The morphology of the PBNPs-modified CCE was characterized by scanning electron microscopy (SEM). The self-assembled PB film exhibited sufficient mechanical, electrochemical stability and high sensitivity in compare with other PB based H2O2 sensors. The sensor showed a good linear response for H2O2 over the concentration range 1 mu M-0.26 mM with a detection limit of ca. 0.7 mu M (S/N=3), and sensitivity of 754.6 mA M-1 cm(-2). This work demonstrates the feasibility of self-assembled PBNPs-modified CCE for practical sensing applications.