| Abstract: | Fe3O4 magnetic nanoparticles were synthesized by chemical co-precipitation with sodium citrate as a surfactant and were used with chitosan to construct a novel hydrogen peroxide sensor. The electrochemical behavior of hydrogen peroxide at the sensor was investigated by cyclic voltammetry. The composite film electrocatalyzed the reduction of hydrogen peroxide, and the peak current increased linearly with concentration from 1.00 × 10?5 to 1.00 × 10?3 mol · L?1 (R = 0.9974) with a detection limit of 1.53 × 10?6 mol · L?1. This novel nonenzyme sensor provided good sensitivity, stability, and precision with potential applications. |
