Synthesis of CuO/Co₃O₄ Coaxial Heterostructures for Efficient and Recycling Photodegradation

Figure 2

SEM images of (a) CuO NR arrays and different morphology of CuO/Co₃O₄ composite, (b) CuO/Co₃O₄ coaxial heterostructures, (c) CuO/Co₃O₄ nanosheets, and (d) Co₃O₄ nanoflowers. The insets show the high-magnification images of the corresponding samples. (e) Schematic diagram of the growth mechanism of the CuO/Co₃O₄ composite photocatalyst.

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