Non-enzymatic hydrogen peroxide biosensor based on rose-shaped FeMoO4 nanostructures produced by convenient microwave-hydrothermal method

In this work, we demonstrated a simple, rapid and reliable microwave-assisted hydrothermal approach to synthesize the uniform rose-shaped FeMoO4 within 10 min. The morphologies of the synthesized materials were characterized by X-ray powder diffraction and scanning electron microscopy. Moreover, a non-enzymatic amperometric sensor for the detection of hydrogen peroxide (H2O2) was fabricated on the basis of the FeMoO4 as electrocatalysis. The resulting FeMoO4 exhibited high sensitivity and good stability for the detection of H2O2, which may be attributed to the rose-shaped structure of the material and the catalytic property of FeMoO4. Amperometric response showed that the modified electrode had a good response for H2O2 with a linear range from 1 μM to 1.6 mM, a detection limit of 0.5 μM (S/N = 3), high selectivity and short response time. Additionally, good recoveries of analytes in real milk samples confirm the reliability of the prepared sensor in practical applications.