Method for producing monolithic porous body comprising titania

Abstract

Provided is a producing method that makes it possible to stably manufacture a homogeneous titania monolithic porous body by a sol-gel method using various titanium alkoxides as a titanium precursor. The method comprises the steps of; preparing a titanium precursor solution by mixing a titanium alkoxide other than titanium methoxide, which is a titanium precursor, and a first anion source in an organic solvent; preparing a sol by adding water or an aqueous solution containing a second anion source to the titanium precursor solution; forming a co-continuous structure of a titania hydrogel phase and a solvent phase by subjecting the sol to sol-gel transition and phase separation in parallel; and removing the solvent phase from the co-continuous structure, in which a temperature lower than the boiling point of the compound having the lowest boiling point present in the titanium precursor solution is maintained in the first three steps, and in which a blending amount of the first anion source or that of the first and the second anion sources is set such that a molar ratio of the first anion source or a molar ratio of the first and the second anion sources in total to the titanium precursor is equal to or higher than 1.05.