For microporosity determination, carbon dioxide adsorption equilibrium at 297 K was determined in a Rubotherm microbalance (Bochum, Germany). Each point of equilibrium was measured only after 1 h; i.e., the time needed to ensure constant weight (equilibrium). The temperature was controlled with an electric oven with 60.5 K. The isotherm presented here has been measured twice with reproducible results and was completely reversible. Activation of the sample was performed at 523 K for 4 h and in vacuum.