The three-dimensional ordered macroporous titanium dioxide(3DOM TiO2) was rapidly fabricated via a sandwich-vacuum method. In this method, tetrabutyl titanate in ethanol solution was filled in the voids between the acrylic acid-modified polystyrene(PS) colloidal crystals that served as the templates and calcified to form 3DOM TiO2. The template was removed during calcination. 3DOM TiO2 has a typical inverse opal structure, and the macropores are arranged in a face-centered cubic(fcc) structure and interconnect with each other by small windows. The average diameter of macroporores is about 230 nm with a shrinkage of about 14%. The XRD result shows that the structure of macropores calcined at 500 ℃ is anatase.
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