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

Abstract

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).