Abstract
To achieve highly sensitive nonenzymatic detection of H2O2, a novel electrochemical sensor based on Fe3O4-Ag nanocomposites was developed. Nanocomposites were synthesized by reducing [Ag(NH3)2]+ at the gas/liquid interface in the presence of silver seeds and confirmed by transmission electron microscopy and X-ray diffractometry. Electrochemical investigations indicate that the sensor is able to detect H2O2 within a wide linear range of 0.5 μM to 4.0 mM, sensitivity of 135.4 μA mM−1 cm−2 and low detection limit of 0.2 μM (S/N = 3). Additionally, the sensor exhibits good anti-interference ability, stability and repeatability. These results show that the Fe3O4-Ag nanocomposite is a promising electrocatalytic material for sensors construction.
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Qi, CC., Zheng, JB. Synthesis of Fe3O4—Ag nanocomposites and their application to enzymeless hydrogen peroxide detection. Chem. Pap. 70, 404–411 (2016). https://doi.org/10.1515/chempap-2015-0224
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DOI: https://doi.org/10.1515/chempap-2015-0224