Abstract
One-dimensional FeWO4@ZnWO4/ZnO heterojunction photocatalysts were prepared by a two-step hydrothermal method. The heterojunction structure was formed through the dispersing of FeWO4 nanoparticles on the surface of ZnWO4/ZnO nanorods. The FeWO4@ZnWO4/ZnO photocatalyst possessed strong visible light absorption capacity. The photocatalytic activities of the prepared photocatalysts were evaluated by degradation of rhodamine B (RhB), methylene blue (MB), and phenol under visible light irradiation. Remarkably, the FeWO4@ZnWO4/ZnO composite showed superior photocatalytic activity than that of individual FeWO4 and ZnWO4/ZnO substrate. The enhanced photocatalytic activity could be attributed to the interfacial transportation of photogenerated holes between FeWO4 and ZnWO4/ZnO substrate, leading to more effective separation and faster transfer of carriers in the heterostructures, which was confirmed by photocurrent responses and photoluminescence spectral analysis. Radical trapping experiments indicated that hydro...
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