Interfacial Engineering of Mos2@Carbonized Mof Heterostructure for Flexible Triboelectric Nanogenerators with Photothermal Therapy

High-performance triboelectric nanogenerators (TENGs) with photothermal behavior are highly demanded in multifunctional electronic skin, smart medical treatment and personalized healthcare. Herein, ZIF-8-derived carbon (ZC)@MoS2 heterostructure with high electrical conductivity and photothermal behaviors was rationally designed as bifunctional nanofiller in hydrogel-based flexible TENG. Originating from the boosted charge transfer kinetics and the separation of photoinduced electron-hole pairs driven by the strong built-in electric field at the ZC and MoS2 interface, the ZC@MoS2 heterostructure hydrogel presented high electrical conductivity and satisfactory photothermal performance. The fabricated ZC@MoS2-based TENG delivers an Voc of 375 V, Isc of 25.2 µA, Qsc of 108 nC and maximum output power density of 3.67 W/m2 under contact frequency of 1 Hz. Furthermore, the damaged tissues can be effectively and timely healed under near-infrared laser irradiation after smart healthcare monitoring. This work provides an effective and general strategy by rational designing heterostructure engineering for next-generation high-performance TENGs with excellent photothermal therapy behavior.