Colloid Systems and Interfaces Stability of Cerium Oxide Nanoparticles in Aqueous Environments: Effects of pH, Ionic Composition, and Suwanee River Humic and Fulvic Acids

Figure 2

Hydrodynamic diameter of CeO₂ NPs as function of pH (1–14) over about 1 hr: (a) pH 1–3, (b) pH 4–6, (c) pH 7–9, (d) pH 10−12, and (e) pH 13 and 14.

(a)

(b)

(c)

(d)

(e)