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

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.