Table 2.

Porosities, average pore radius and median radius of the R, N1, N3 and N5 samples

Sample designation	Porosity [%]	Average pore radius [nm]	Median pore radius [nm]
R	25.32 ± 1.4	18.4 ± 2.1	26.6
N1	24.98 ± 2.0	18.2 ± 2.2	26.5
N3	23.78 ± 1.4	16.5 ± 1.7	21.8
N5	23.89 ± 1.5	16.1 ± 1.8	20.6