Preparation of Colloidal Anatase TiO_2 Secondary Submicroparticles by Hydrothermal Sol-Gel Method

摘要

Anatase TiO_2 nanoparticles giving stable colloids of tightly aggregated secondary particles were prepared by a hydrothermal sol-gel method. The average sizes of the primary and secondary particles, as estimated by TEM and DLS. were ca. 10 nm and ca. 100 nm, respectively. These particles were dispersed milky-whitely in water without any surfactant or polymer.