Method for preparing organic ligand-capped titanium dioxide nanocrystals

US7709540B2 · kind B2 · utility

Assignee

• Changchun Institute of Applied Chemistry Chinese Academy of Sciences · CN

Inventors

• Daocheng Pan · Changchun, CN
• Nana Zhao · Nanhu, CN
• Qiang Wang · Karlsruhe, DE
• Xiangling Ji · Changchun, CN
• Shichun Jiang · Changchun, CN
• Lijia An · Changchun, CN

Key dates

• Filing date: Dec 2, 2005
• Grant date: May 4, 2010
• Expiry date: Feb 27, 2027

Classification

• Technology area (CPC Y): Emerging Cross-Sectional Technologies
• CPC primary: Y10S977/773
• WIPO field: Materials, metallurgy
• WIPO sector: Chemistry

Abstract

The present invention belongs to a method for preparing organic ligand-capped titanium dioxide nanocrystals, wherein the method comprises steps of using methyl titanate, ethyl titanate, n-propyl titanate, iso-propyl titanate, butyl titanate or titanium tetrachloride as a titanium source, and with capping by oleic acid or an organic capping agent, reacting the titanium source in an organic non-polar solvent with an aqueous alkaline substance solution in the interface at a temperature of 25 to 280° C. for 0.5 to 240 hrs, thus a transparent sol containing titanium dioxide nanocrystals is obtained, said the titanium dioxide nanocrystals have particle diameters of 1-20 nm. The preparing process has the features of mild reaction conditions and is a simpler and easier method with a shorter preparation period, thereby facilitating the industrialization.