Enhanced photocatalytic degradation activity for tetracycline under visible light irradiation of Ag/Bi3.84W0.16O6.24 nanooctahedrons†
Abstract
In this work, a Ag/Bi3.84W0.16O6.24 nanooctahedron composite photocatalyst was successfully synthesized via a green method at room temperature using silver nitrate (AgNO3) as the silver source. Furthermore, the photocatalytic degradation of TC under visible light was conducted to investigate the effect of Ag. In particular, the Ag/Bi3.84W0.16O6.24 nanooctahedron composite photocatalyst showed the highest photocatalytic activity when the content of Ag was 10% (molar ratio R = 0.1). Electron spin resonance examination confirmed that photoinduced active species (˙OH and O2˙−) were involved in the photocatalytic degradation of TC. The high-efficiency photocatalytic activity of the as-prepared Ag/Bi3.84W0.16O6.24 photocatalyst could be ascribed to the SPR absorption of silver nanoparticles as well as fast generation, separation and transportation of photogenerated carriers.