Low-cost Synthesis of the ZnO/CuO Nanocomposites by Hydrothermal Methods with Improved Activity of Photodegradation

Low-cost Synthesis of the ZnO/CuO Nanocomposites by Hydrothermal Methods with Improved Activity of Photodegradation

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Chang et al. have proposed a two-step hydrothermal method to synthesize ZnO/CuO nanocomposites, which is a promising photocatalytic material. This method is not only easy but also low-cost. The morphology and structure of the synthesized ZnO/CuO nanocomposites were characterized by SEM and XRD.

It was reported that the size and the thicknesses of the synthesized ZnO/CuO nanocomposites are typically in the range 100∼300 nm and 40∼50 nm, respectively. The diffraction peaks of both ZnO and CuO were observed in the XRD patterns of the synthesized nanocomposites, which confirmed the formation of the ZnO/CuO nanocomposites. The EDS element mapping of the as-synthesized ZnO/CuO composites further confirmed that CuO and ZnO are well-distributed in the nanocomposites, which will be beneficial for charged carrier transfer between ZnO and CuO in photocatalytic process.

The photodegradation experimental results showed that methylene blue and methylene orange can be degraded completely within 15 and 25 min by the ZnO/CuO nanocomposites with a CuO/ZnO ratio of 20 %, respectively. Its photodegradation rate was 6 times faster than that of pure ZnO, and also faster than the previous reported ZnO/CuO nanocomposites. This enhanced photocatalytic activity might be ascribed to the low recombination rate of photogenerated carriers.

Original article citation

T.Q. Chang, Z. J. Li, G. Q. Yun, and et al, “Enhanced Photocatalytic Activity of ZnO/CuO Nanocomposites Synthesized by Hydrothermal Method”, Nano-Micro Lett. 5(3), 163-168 (2013). http://dx.doi.org/10.5101/nml.v5i3.p163-168

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