Research Article

Design and Synthesis of Reusable Nanoparticles for Reversible Chemisorption of Hexavalent Chromium Anions from Aqueous Media and Catalysis

Figure 7

XPS spectra of Fe3O4@SiO2@LEuH@PW10 for (a) elemental information and chemical state information for (b) Eu3d and (c) for W4f.
(a)
(b)
(c)