A nonenzymatic H2O2 biosensor based on Pd/Fe3O4/rGO nanocomposite

作者：Zhao X.; Li Z.; Chen C.; Zhu Z.

来源：Materials Science and Technology, 2017, 25(6): 56-60.

DOI：10.11951/j.issn.1005-0299.20160446

• Biosensor
• Fe3O4/rGO
• Hydrogen peroxide
• Nanocomposite
• Pd

There is a great demand for the fast and accurate sensing of hydrogen peroxide (H2O2) in environmental monitoring, food industry, clinical, pharmaceutical and other fields. Due to the high sensitivity, fast response and low detection limit, electrochemical method is considered as an ideal analytical strategy. A nonenzymatic H2O2 biosensor was obtained by utilizing the electrodeposition of Pd nanoparticles on iron oxide-reduced graphene oxide (Fe3O4/rGO) nanocomposite modified glassy carbon electrode (GCE). The electrochemical characteristics of the resulting biosensor were characterized by cyclic voltammetry (CV) and chronoamperometry methods. These results indicated that the prepared Pd/Fe3O4/rGO/GCE exhibited excellent electro-catalytical activity towards the reduction of H2O2 and the synergetic effect of Pd and Fe3O4/rGO nanocomposite on the reaction of H2O2. The linear range of Pd/Fe3O4/rGO is 0.05~1 mM and 1~2.6 mM, with a detection limit of 3.918 μM (S/N=3). The biosensor also exhibited high sensitivity, high reproducibility and good anti-interferent ability, and thus has certain value on the practical applications.

• 出版日期2017
• 单位Polytechnic university