2.2.3. Surface area and porosity analysis
The BET surface area analysis and porosity were determined
using a Micromeritics ASAP 2010 instrument. All samples were
gassed at 120 for 10 h to remove any physically adsorbed
species. Nitrogen isothermal adsorption and desorption experiments
were conducted at relative partial pressures (P/P0) from
10?3 to 0.01, respectively