CRYSTALLINE MACRO- AND MESOPOROUS TITANIUM DIOXIDE AND METHOD FOR OBTAINING SAME

摘要

The present invention concerns a method for preparing crystalline macro- and mesoporous titanium dioxide (TiO2), in particular comprising the steps of preparing an acidified mixture comprising a separator, the mixture being acidified to at least 25% by mass in acid; - adding the acidified mixture comprising a separator and a source of nitrogen to a source of titanium, in two stages; - obtaining a titanium dioxide gel from the nitrogen-doped titanium solution; - washing the titanium dioxide gel with an alcohol; - obtaining a crystalline macro- and mesoporous titanium dioxide from the washed titanium dioxide gel. The invention also concerns a crystalline macro- and mesoporous titanium dioxide that can be obtained by the above method.