科研之友
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摘要
Novel Cu2O/Cu nanocomposites with a flower-like nanoarchitecture were prepared by a facile template-free two-step hydrothermal synthesis route using Cu(NO3)(2)center dot 3H(2)O as a precursor. Their properties were characterized by X-ray diffraction (XRD), UV-Vis diffuse reflection spectroscopy (DRS), and scanning electron microscopy (SEM). The flower-like Cu2O/Cu nanocomposites consist of many nanopetals with lengths of 300-500 nm and widths of 30-70 nm. They show strong absorption for visible light. The content of Cu in the composites could be easily controlled by adjusting the hydrothermal time. As photocatalysts, the composites exhibit much higher photocatalytic activity than Cu2O for the photodegradation of Procion Red MX-5B (PR) under visible light illumination when the mass fraction of Cu lies between 27% and 71%. Moreover, flower-like Cu2O/Cu nanocomposites show better performance for the photodegradation of PR than cubic composites. The synthesized composites can also be recycled for further use.
