Fig. 5: XPS analysis of GO/UiO-66-NDC before and after Cr (VI) adsorption.
From: Adsorption and DFT investigations of Cr(VI) removal using nanocrystals decorated with graphene oxide

a Survey scan of GO/UiO-66-NDC (b) Survey scan of GO/UiO-66-NDC after Cr(VI) adsorption, (c) carbon (d) oxygen, (e) Zirconium and (f) Cr 2p after Cr adsorption.