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. 2022 Nov 24;10:1093073. doi: 10.3389/fchem.2022.1093073

FIGURE 2.

FIGURE 2

Characterizations of Mo@ZIF-8. (A) The FT-IR spectra of ZIF-8 and Mo@ZIF-8. The stretching peaks in the ZIF-8 and Mo@ZIF-8 were labeled. (B–D) XPS spectra of Mo@ZIF-8. (B) Survey spectrum. High-resolution XPS spectra of (C) Mo 3d, (D) Zn 2p.