Photoreduction of CO₂ to CH₄ over Efficient Z-Scheme -Fe₂O₃/g-C₃N₄ Composites

Figure 3

XPS survey of 10FeCN composite (a) and its XPS spectra of Fe2p (b), O1s (c), N1s (d), and C1s (e).

(a)

(b)

(c)

(d)

(e)