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| With industrial and economic development, global environmental pollution is worsening. Therefore, preparation of high photocatalytic activity Cd-doped ZnO nanoflowers could solve this problem. The ZnO nanoflowers doped with cadmium ions have been prepared by a hydrothermal method and the photocatalytic activities of the asprepared samples for the rhodamine B (RhB) photo-degradation were investigated. The products were characterized by multiple techniques: X-ray diffraction (XRD), scanning electron microscopy (SEM), energy-dispersive X-ray analysis (EDS), photoluminescence (PL) spectroscopy, UV-visible spectroscopy and so on. The results manifested the crystal quality of the samples were much weakened on increasing doping concentration from 5 to 20 at%. Then the absorption edge and the UV emission peak of the Cd-doped ZnO nanoflowers shifted to the red. It was also found that the band gap decreased linearly from 3.24 eV to 3.06 eV. Especially, the 5% Cd-doped ZnO nanoflowers showed the highest photocatalytic activity which increased the rate of photocatalytic degradation of rhodamine B (RhB) up to 98% after 3 h of irradiation. So the photocatalytic activities of the 5 percent Cd-doped ZnO nanoflowers are higher than other samples. |
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| Keywords: ZnO, Cd-doping, photocatalytic |
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