Fig. 4

Nitrogen adsorption-desorption isotherms of (a) Zn-MOF, (b) Zn-MOF-NH2, (c) pure ZIF-8, (d) Zn-MOF-NH2-ZIF-8, (f) Zn-MOF-NH2-ZIF-8@Cu.

Nitrogen adsorption-desorption isotherms of (a) Zn-MOF, (b) Zn-MOF-NH2, (c) pure ZIF-8, (d) Zn-MOF-NH2-ZIF-8, (f) Zn-MOF-NH2-ZIF-8@Cu.