Facile synthesis of TiO 2 hollow spheres via aerosol‐assisted spray drying for photocatalysis

A simple and feasible aerosol‐assisted spray‐drying method was developed. High‐resolution transmission electron microscopy images demonstrated the as‐prepared TiO 2 possessed hollow structure with large cavity formed by the accumulation of numerous nanoparticles. Moreover, the obtained TiO 2 hollow spheres could lead to the improved light‐harvesting and low recombination of photo‐generated electron–hole carriers, as well as large specific surface area. These excellent properties contributed to the superior photocatalytic activity in degrading Rhodamine B.