In our paper, spherical model was just a choice in the SAXS date fitting, so we did not provide more illustrate, but a reference (L A Feigin and D I Svergun, Structure Analysis by Small-Angle X-Ray and Neutron Scattering, Plenum Press, New York, 1987) was provide in the manuscript. On line 173, we gave a conclusion “the number of pores increased, but the size distribution did not change.” We did not consider the pore volume, but we can deduce that the pores volume increase as the increase of the number of pores.
Could you be more specific on the "spherical model" on line 170? Co you assume the pore volume remains unchanged, but the number increases? or visa verse?