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. 2021 Jan 25;8:622567. doi: 10.3389/fchem.2020.622567

Figure 10.

Figure 10

XP spectra of (A) IL/MOF composite and IL/MOF composite after the adsorptions of MB, MO, and their mixture; (B) F 1s; (C) Al 2p; and (D) N 1s. XP, X-ray photoelectron; IL, ionic liquid; MOF, metal–organic framework; MB, methylene blue; MO, methyl orange.