Abstract
ZnO nanorod arrays were fabricated on Cu 2O thin film by a simple low-temperature liquid-phase-deposition method. The samples were characterized by X-ray powder diffraction (XRD) and field emission scanning electron microscopy (FESEM). The UV-Vis spectroscopy showed that the obtained sample was able to absorb a large part of visible light (up to 650 nm). Their photocatalytic activities were investigated by degradation of dye methylene blue (MB) under UV-Vis and visible light irradiation. It was found that the photocatalytic activity of the ZnO/Cu 2O NRs was higher than the ZnO/ZnO NRs under UV-Vis light. In a word, Cu 2O played an important role in enhancing the photocatalytic activity of the ZnO/Cu 2O NRs.
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