| 摘要 |
<p>The present invention provides a method for the production of small-size titanium oxide particles, comprising the steps of: e) providing a solid containing titanic acid; f) contacting the solid with an acidic aqueous medium thereby forming an aqueous precursor solution at given conditions of temperature lower than 100° C., Titanium cation concentration lower than 20 wt % and higher than 0.1 wt %, pH lower than 1 and strong acid concentration higher than 2.5% and lower than 30%; g) optionally, adding one or more capping agents to the aqueous precursor solution; and h) modifying at least one of the conditions of the aqueous precursor and maintaining the aqueous precursor at the modified conditions, whereupon precipitation of a precipitate comprising small-size titanium oxide particles takes place, the modifications being selected from at least one of temperature elevation by at least 5° C. and pH elevation by at least 0.1 pH units.</p> |
