Fig. 1. The SEM images of CuO nanowires and CuO/ZnO composite nanowires

Fig. 2. The EDS patterns of CuO nanowires and CuO/ZnO composite nanowires

Fig. 3. The TEM images of CuO/ZnO composite nanowires

Fig. 4. The XRD patterns of CuO nanowires and CuO/ZnO composite nanowires

Fig. 5. The XPS spectra of CuO/ZnO composite nanowires

Fig. 6. Degradation profiles of MB with CuO and CuO/ZnO photocatalysts under simulated sunlight condition

Fig. 7. The PL spectra of CuO nanowires and CuO/ZnO composite nanowires

Fig. 8. The schematic diagram of the photocatalytic mechanism of CuO/ZnO nanowires heterostructure