The maximum
uptake capacity of 1000 cm3 g1 for nanoZIF-8 was reduced
to 312 cm3 g1 for the bulk sample (Figure 5). By contrast, the
BET surface area of the am-nanoZIF-8 was 56 m2 g1, and the
maximum uptake was only 70 cm3 g1, both attributed to
external surfaces of the particles.