Aminopropyl-Functionalized Silica CO₂ Adsorbents via Sonochemical Methods

Figure 2

N₂ a/d 77 K isotherms with inset BJH pore size distributions obtained for (a) HX, S1, S2, S4, and S7 and (b) A24, S2-NR, S2-N2, S2-25, and S2-12.

(a)

(b)