fig3

Figure 3. The calculated properties of rGO with the H⁺ and Zn²⁺ adsorption. (A) Structural energy; (B) charge distribution; (C) adsorption energy; (D) optimized charge density difference; and DOS of rGO with the (E) H⁺ and (F) Zn²⁺ adsorption^[28]. Reused with permission from Wiley. rGO: Reduced graphene oxide; DOS: density of states.