Preparation of Large‐Area 3D Ordered Macroporous Titania Films by Silica Colloidal Crystal Templating

Abstract

Highly ordered macroporous titania films (see Figure) can be prepared over large areas using colloidal silica spheres as a template. This template material has a number of advantages over the more commonly used polystyrene spheres, such as easy removal of the template by immersion in a warm NaOH solution and shrinkage of the macroporous framework by less than 3 %.