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

Publication date: Available online 19 September 2019Source: Chinese Chemical LettersAuthor(s): Jing Zheng, Dandan Song, Hong Chen, Jingli Xu, Njud S. Alharbi, Tasawar Hayat, Min ZhangAbstractThe 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.Graphical abstractHerein, MoS2 decorated N-doped carbon nanotubes (NCNTs@MoS2) hybrid composites have been fabricated, which was employed to construct a sensing system based on intrinsic peroxidase-like activity to detect H2O2 and AA.
Source: Chinese Chemical Letters - Category: Chemistry Source Type: research