MoS2 and g-C3N4 nanosheet co-modified Bi2WO6 ternary heterostructure catalysts coupling with H2O2 for improved visible photocatalytic activity

Abstract

Abstract MoS2 and g-C3N4 nanosheet co-modified Bi2WO6 ternary heterostructure catalyst (g-C3N4/MoS2/Bi2WO6) has been synthesized through the hydrothermal and ultrasound method and applied for tetracycline (TC) degradation in synergy with H2O2 under visible light irradiation. The CN/MS/BWO catalysts were analyzed by XRD, SEM, HRTEM, PL, FI-IR, XPS and UV–vis DRS. The optimal 3CN/0.5MS/BWO catalyst can degrade 90% of TC for 60\xa0min under visible light with H2O2 (2\xa0mL/L), being 30% higher than that of pure Bi2WO6. Recycling experiments showed that the photocatalysts maintained outstanding stability after five-time recycles. The improved photocatalytic ability of the CN/MS/BWO heterostructure was owing to the increased visible-light absorption and photogenerated electron-hole pairs separation rate. This work explores one high-efficiency photocatalytic degradation process of antibiotics, which will help further research in this field.