Abstract
A novel high-proportion dual Z-scheme V2O5/FeVO4/Fe2O3 photocatalyst was successfully constructed by in-situ synthesis strategy of solid phase V2O5 and Fe2O3, and applied within the photodegradation of norfloxacin in solution under simulated solar light. The photocatalytic activity of the ternary Z-scheme V2O5/FeVO4/Fe2O3 nanocomposite was estimated. A series of factors affecting the photocatalytic performance of V2O5/FeVO4/Fe2O3 were investigated. The possible mechanism on the ternary dual Z-scheme V2O5/FeVO4/Fe2O3 photocatalytic system was proposed. The results reveal that the obtained FeVO4 nanoparticles exist between V2O5 and Fe2O3 nanoparticles, and that the three nanoparticles can coexist with two blurred contact interfaces, which promotes electron transmission and high separation efficiency of electron-hole pairs. The Z-scheme V2O5/FeVO4/Fe2O3 system exhibits superior photocatalytic activity, due to the formation of the high-proportion dual Z-scheme photocatalyst, as well as strong redox capacity from its two valence band oxidation surfaces. Moreover, V2O5/FeVO4/Fe2O3 has preeminent stability after five cycles, and photo-generated hole plays a major role in photocatalytic degradation. It is expected that the dual Z-scheme V2O5/FeVO4/Fe2O3 photocatalytic technology holds great application prospects in the construction of effective photocatalysts and the treatment of antibiotics in water and wastewater utilizing solar energy.
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