Fabrication of Micrometer‐Scale Anatase‐Phase TiO ₂ Congeries Assembled with Hollow Spheres

Abstract

Micrometer‐scale anatase‐phase TiO 2 congeries assembled with hollow spheres have been synthesized by a bubble‐template method combined with a facile chemical process. The as‐prepared products were characterized by means of X‐ray diffraction, field emission scanning electron microscopy, and transmission electron microscopy. Some of the congeries exhibited unique three‐dimensional hierarchical architectures. The bubble‐template strategy used in the synthetic process may represent a general approach to fabricate hollow micro‐ and nanostructures and therefore contribute to the formation mechanisms of hollow micro‐ and nanostructures.