| 摘要 |
Provided is a production method that makes it possible to stably manufacture a homogeneous titania monolithic porous body by the sol-gel method using various titanium alkoxides as a titanium precursor. The present invention has: a step for preparing a titanium precursor solution by mixing a first anion source and a titanium alkoxide (other than titanium methoxide), which is a titanium precursor, in an organic solvent; a step for preparing a sol by adding an aqueous solution containing water or a second anion source to the titanium precursor solution; a step for forming a co-continuous structure of a titania hydrogel phase and a solvent phase by subjecting the sol to phase separation and sol-gel transition in parallel; and a step for removing the solvent phase from the co-continuous structure. 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 the amount of first anion source or first and second anion source in combination is set so that the molar ratio of the first anion source or the molar ratio of the first and second anion sources in total to the titanium precursor is 1.05 or higher. |
