Fast preparation of MoS2 nanoflowers decorated with platinum nanoparticles for electrochemical detection of hydrogen peroxide

Molybdenum disulfide (MoS2) has shown increasing importance for the creation of functional nanomaterials. Here we demonstrate the quick preparation of MoS2 nanoflowers decorated with platinum nanoparticles (PtNPs) by a simple one-step hydrothermal synthesis. Scanning and transmission electron microscopy techniques were utilized to investigate the morphology of the fabricated MoS2–PtNP nanohybrids and the uniform decoration of PtNPs on MoS2. Other techniques like X-ray photoelectron spectroscopy, Raman spectroscopy, and X-ray diffraction were used to measure the structure and properties of the synthesized MoS2–PtNP nanohybrids. We expected the created MoS2–PtNP nanohybrids to show excellent performance for biosensor applications. To prove this, the synthesized MoS2–PtNP nanohybrids were utilized in the application of an electrochemical hydrogen peroxide (H2O2) sensor by using the nanohybrids to modify the glass carbon electrode. Our sensing result indicates that the fabricated MoS2–PtNP based H2O2 sensor reveals a wide linear range (0.02 to 4.72 mM), low detection limit (0.345 μM, S/N = 3), high selectivity, and long-term stability (at least two weeks).