Fabrication and Response Surface Methodology for the Adsorption of Nickel Ferrite-Graphene Oxide Nanocomposite for the Removal of Methylene Blue from Water

Figure 3

XPS spectra of (a) GO, (b) C 1s of GO, (c) NGO, (d) C 1s, (e) O 1s, (f) Ni 2p, and (g) Fe 2p of NGO.

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