The invention relates to a material having a hierarchised porosity and made of at least two elementary spherical particles having a maximum diameter of 200 microns, at least one of said spherical particles including at least one matrix containing silicon oxide and having crystallised walls, wherein said material has a macroporous volume as measured by mercury porosimetry of between 0.05 and 1 ml/g, and a mesoporous volume as measured by nitrogen volumetric analysis of between 0.03 and 0.4 ml/g. The invention also relates to the preparation of this material and to the use thereof as an adsorbent or an acidic solid.