Abstract: Three-Dimentionally Ordered macroporous titanium-silica mixed oxides were successfully synthesized
by using polystyren sphere colloid crystal as the template and the sol of tetraethyl silicate and tetrabutoxy-titane as the filling fluid. The sol filled in the voids among
spheres by capillary forces, and then transformed into gel in situ. Latex spheres were removed by calcination(<5℃/min; 300℃,5h; 570℃, 5h). The macroporous samples show
a beautiful iridescence in reflected light. SEM indicates that the pores are about 500nm in size and arrayed periodically in a face-centered cubic
(fcc) structure and connected with each other by small windows. EDS indicates that the Si/Ti molar ratio is 2.7. XRD indicates the wall of the
pores is amorphous.

Key words: titanium-silica mixed oxides, three-dimensionally ordered macroporous, polystyrene sphere, colloid crystal