Rational construction of photothermal antibacterial nanomaterials presents a promising avenue to combat bacterial resistance. Herein, an octahedral MoS2/MoN heterostructure was synthesized via a MOFs-assisted strategy involving phosphomolybdic acid encapsulation followed by thermal sulfurization (500-800 degrees C). The optimized MoS2/MoN-700 (mass ratio 56.7:43.3) exhibited enhanced crystallinity and interfacial coupling, as confirmed by XRD refinement, which facilitated exceptional near-infrared absorption and a photothermal conversion efficiency of 42.14 % under 980 nm laser irradiation. Antibacterial assays demonstrated rapid inactivation rates of 94.13 % for E. coli and 97.13 % for S. aureus within 5 min. This work not only advances transition metal chalcogenide/nitride hybrid materials but also provides a versatile platform for photothermal antimicrobial applications in medical device sterilization and infection management.