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. 2021 Dec 8;9:797738. doi: 10.3389/fchem.2021.797738

FIGURE 6.

FIGURE 6

X-ray photoelectron spectroscopy (XPS) spectra of 7%-CuO/g-C3N4: survey scan (A), C1s (B), N1s (C), Cu2p (D), and O1s (E).