2D/2D h-BN/N-doped MoS2 Heterostructure Catalyst with Enhanced Peroxidase-like Performance for Visual Colorimetric Determination of H2 O2.

Recently, nanozymes have attracted extensive attention because of their advantages of combining nanomaterials with enzymes. Herein, hexagonal boron nitride (h-BN) and nitride-doped molybdenum disulfide (N-MoS2 ) nano-composites (h-BN/N-MoS2 ) were synthesized by facile and cost-effective liquid exfoliation with a solvothermal method in nontoxic ethanol solution. The results show that h-BN, as a co-catalyst, can not only dope into the lattice of MoS2 but also form a heterogeneous structure with MoS2 NSs. It expanded the layer spacing and specific surface area of MoS2 NSs, which was beneficial to the contact between the catalyst and the substrate, and resulted in a synergistic enhancement of the catalytic activity of hydrogen peroxide (H2 O2 ) with MoS2 . A colorimetric determination platform of h-BN/N-MoS2 -TMB-H2 O2 was constructed. It exhibited a wide linear range of 1-1000 μM with a low limit of detection (LOD) of 0.4 μM under optimal conditions, high sensitivity and stability, as well as good reliability (99.4-110.0%) in practice, making the measurement system more widely applicable.1. Introduction.