MIL-Derived Hollow Tubulous-Shaped In 2 O 3 /ZnIn 2 S 4 Z-Scheme Heterojunction for Efficient Antibacterial Performance via In Situ Composite.

In this study, a hollow tubulous-shaped In 2 O 3 derived from MIL (MIL-68 (In)) exhibited an enhanced specific surface area compared to MIL. To further sensitize In 2 O 3 , ZnIn 2 S 4 was grown in situ on the derived In 2 O 3 . The 40In 2 O 3 /ZnIn 2 S 4 composite (1 mmol ZnIn 2 S 4 loaded on 40 mg In 2 O 3 ) exhibited degradation rates of methyl orange (MO) under visible light (80 mW·cm -2 , 150 min) that were 17.9 and 1.4 times higher than those of the pure In 2 O 3 and ZnIn 2 S 4 , respectively. Moreover, the 40In 2 O 3 /ZnIn 2 S 4 exhibited an obviously improved antibacterial performance against Pseudomonas aeruginosa , with an antibacterial rate of 99.8% after visible light irradiation of 80 mW cm -2 for 420 min. The 40In 2 O 3 /ZnIn 2 S 4 composite showed the highest photocurrent density, indicating an enhanced separation of photogenerated charge carriers. Electron spin resonance results indicated that the 40In 2 O 3 /ZnIn 2 S 4 composite generated both ·O 2 - and ·OH radicals under visible light, whereas ·OH radicals were almost not detected in ZnIn 2 S 4 alone, suggesting the presence of a Z-scheme heterojunction between In 2 O 3 and ZnIn 2 S 4 , 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.