Hierarchical Order in Hollow Spheres of Mesoporous Silicates

Abstract

Mesoporous MCM-41 silica hierarchical structures consisting of a high yield (∼98%) of uniform-sized hollow spheres of diameter 5.0 ± 1.0 μm have been obtained. The nanochannels on the shell are in latitude direction and the inside of the micron spheres has intricate pillar structures producing structures of various topological genus ranks.