Electrochemical sensor based on novel two-dimensional nanohybrids: MoS2 nanosheets conjugated with organic copper nanowires for simultaneous detection of hydrogen peroxide and ascorbic acid

Abstract

There has been increasing interest in the use of molybdenum disulfide (MoS₂) for the synthesis and application of functional hybrid nanomaterials. Here, for the first time, we prepared MoS₂ nanosheets that were modified with organic copper (OCu) nanowires by a facile two-step hydrothermal synthesis. Multi-characterization techniques such as scanning electron microscopy, transmission electron microscopy, and atomic force microscopy were used to observe the conjugation of OCu with MoS₂ and the morphology of the fabricated MoS₂–OCu nanohybrids. In addition, other methods such as X-ray photoelectron spectroscopy, Fourier transform infrared spectroscopy, and X-ray diffraction were utilized to understand the structure and properties of the prepared MoS₂–OCu nanohybrids. Finally, the synthesized MoS₂–OCu nanohybrids were further utilized to fabricate multi-functional electrochemical sensors for highly sensitive detection of hydrogen peroxide (H₂O₂) and ascorbic acid (AA). The obtained results indicate that the synthesized novel MoS₂–OCu nanohybrids exhibit excellent electrocatalytic activity towards both analytes, and present potential applications for detecting H₂O₂ and AA with high stability, sensitivity, and selectivity.