MIL-Derived Hollow Tubulous-Shaped InO/ZnInS Z-Scheme Heterojunction for Efficient Antibacterial Performance via In Situ Composite.

In this study, a hollow tubulous-shaped InO derived from MIL (MIL-68 (In)) exhibited an enhanced specific surface area compared to MIL. To further sensitize InO, ZnInS was grown in situ on the derived InO. The 40InO/ZnInS composite (1 mmol ZnInS loaded on 40 mg InO) exhibited degradation rates of methyl orange (MO) under visible light (80 mW·cm, 150 min) that were 17.9 and 1.4 times higher than those of the pure InO and ZnInS, respectively. Moreover, the 40InO/ZnInS exhibited an obviously improved antibacterial performance against , with an antibacterial rate of 99.8% after visible light irradiation of 80 mW cm for 420 min. The 40InO/ZnInS composite showed the highest photocurrent density, indicating an enhanced separation of photogenerated charge carriers. Electron spin resonance results indicated that the 40InO/ZnInS composite generated both ·O and ·OH radicals under visible light, whereas ·OH radicals were almost not detected in ZnInS alone, suggesting the presence of a Z-scheme heterojunction between InO and ZnInS, thereby enhancing the degradation and antibacterial capabilities of the composite. This offers fresh perspectives on designing effective photocatalytic materials for use in antibacterial and antifouling applications.