| abstract |
This invention relates to a porous group 4 metal oxide (preferably titanium oxide) and to a method for preparation thereof The group 4 metal oxide is prepared by adding a particle growth inhibiter to a hydrosol, a hydrogel or a dried product of a hydrous group 4 metal oxide represented by MO (2-x) (OH) 2x (wherein M denotes a group 4 metal and x > 0.1) followed by drying and calcining, to form a product having a specific surface area of 80 m 2 /g or more, a pore volume of 0.2 ml/g or more and a pore sharpness degree of 50% or more. The preparation of the group 4 metal oxide may involve a pH swing operation. The product has excellent heat stability and is useful as a catalyst or a catalyst carrier in which a catalyst metal is highly dispersed. |