The sample
was degassed at 573 K for 10 h before measurement.
The specific surface area of the sample was calculated
using BET method. Since, a nonlocal density functional
theory (NLDFT) model of adsorption on mesoporous
materials has been reported [9,13] for evaluation of
more realistic values of pore wall thickness and pore size
distribution, NLDFT method was employed in present
studies