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

Figure 6

XPS spectra of (a) Cu 2p, (b) O 1s for CuO NRs, (c) Cu 2p, and (d) O 1s for CuO/Co₃O₄ coaxial heterostructures. (e) 7 XPS spectra of Co 2p for CuO/Co₃O₄ coaxial heterostructures.

(a)

(b)

(c)

(d)

(e)