Characterization of an Iron-Copper Bimetallic Metal-Organic Framework for Adsorption of Methyl Orange in Aqueous Solution

Figure 6

XPS spectra of MIL-53(Fe, Cu) before and after adsorption of methyl orange. (a) Full spectrum map before and after adsorption. (b) C before and after adsorption. (c) N before adsorption. (d) O after adsorption. (e) Fe before and after adsorption. (f) Cu before and after adsorption.

(a)

(b)

(c)

(d)

(e)

(f)