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

Figure 3

TEM/HRTEM images of CuO NR (a) and (b), (c–e) for CuO/Co₃O₄ coaxial heterostructures, (f–h) for CuO/Co₃O₄ nanosheets, and (i–k) for Co₃O₄ nanoflowers.

(a)

(b)

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(e)

(f)

(g)

(h)

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(k)