Preparation of Hollow Anatase TiO₂ Nanospheres via Ostwald Ripening

In this work, we report a simple "one pot" approach to prepare hollow anatase TiO₂ nanospheres via Ostwald ripening under hydrothermal conditions. Inner nanospace and highly organized crystallites in the shell structure and surface regions can be created with a wide range of controlling parameters. The formation mechanism has been investigated with TEM/ED/SEM/EDX/XRD/XPS methods. The approach shows a high versatility for structural engineering of various targeted morphological products, including inner material refills.