Novel and Facile Method for the Preparation of Monodispersed Titania Hollow Spheres

摘要

The fabrication of monodispersed hollow spheres in varying sizes and shapes is very interesting and has a lot of potential applications.This paper provides a very simple route to preparing hollow titania spheres using polystyrene (PS) as a template.In this approach,the titania shells were first formed and the PS cores were dissolved subsequently,even synchronously,in the same medium; neither an additional dissolution nor a calcination process was needed to remove the PS cores.Transmission electron microscopy,scanning electron microscopy,Fourier transform infrared spectroscopy,thermogravimetric analysis,and Barret-Emmet-Teller measurements were used to characterize the monodispersed hollow titania spheres.A possible formation mechanism of the hollow spheres was proposed.