Fig. 5.
(a) X-ray photoelectron spectra survey scans of rGO before and after Cd(II) adsorption, and XPS spectra of (b) C1s, (c) O1s, and (d) Cd3d for rGO before and after Cd(II) adsorption.
(a) X-ray photoelectron spectra survey scans of rGO before and after Cd(II) adsorption, and XPS spectra of (b) C1s, (c) O1s, and (d) Cd3d for rGO before and after Cd(II) adsorption.