Enhanced peroxidase-like activity of hierarchical MoS₂-decorated N-doped carbon nanotubes with synergetic effect for colorimetric detection of H₂O₂ and ascorbic acid

The exploitation of multifunctional nanocomposites is highly desired in environmental monitoring, biosensors, and medical diagnosis. In this paper, a simple approach has been proposed to fabricate MoS₂ decorated N-doped carbon nanotubes (NCNTs@MoS₂) hybrid composites as efficient peroxidase-like mimics. The combination of the MoS₂ and N-doped carbon nanotubes (NCNTs) brings about an enhanced synergistic effect, leading to remarkably decent intrinsic peroxidase-mimic activities than that of the single components. Due to the high catalytic efficiency of the resultant NCNTs@MoS₂ hybrid nanotubes as peroxidase-like mimics, a convenient colorimetric approach for the sensitive determination of H₂O₂ and ascorbic acid have been developed with a detection limit of about 0.14 μmol/L and 0.12 μmol/L, respectively. The work offers a new strategy for the fabrication of peroxidase-like nanomaterials with excellent catalytic activity, which indicates great promising applications in sensitive detections in real samples.