A platform for research: civil engineering, architecture and urbanism
A platform for research: civil engineering, architecture and urbanism
METHOD FOR PRODUCING MONOLITHIC POROUS BODY COMPRISING TITANIA
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.
METHOD FOR PRODUCING MONOLITHIC POROUS BODY COMPRISING TITANIA
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.
METHOD FOR PRODUCING MONOLITHIC POROUS BODY COMPRISING TITANIA
VERFAHREN ZUR HERSTELLUNG EINES MONOLITHISCHEN PORÖSEN KÖRPERS MIT TITANDIOXID
PROCÉDÉ DE FABRICATION D'UN CORPS MONOLITHIQUE POREUX COMPRENANT DE L'OXYDE DE TITANE
MIYAMOTO RIICHI (author)
2018-03-21
Patent
Electronic Resource
English
Method for producing monolithic porous body comprising titania
| European Patent Office | 2019
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| European Patent Office | 2021