Preparation and application of poly(alkoxytitanate) as a TiO sub(2) precursor with high storage stability

• Published in: Journal of sol-gel science and technology 2014-03, Vol.69 (3), p.528-535
• Main Authors: Dou, Qizheng, Peter, Karin, Demco, Dan Eugen, Wang, Jingbo, Mourran, Ahmed, Jaumann, Manfred, Moeller, Martin
• Format: Article
• Language: English
• Subjects: Forming; Precursors; Sol gel process; Solubility; Solvents; Storage stability; Thin films; Titanium dioxide
• ISSN: 0928-0707; 1573-4846
• DOI: 10.1007/s10971-013-3253-9

Titanium dioxide is a basic material of our daily life. Because of its favourable properties, such as harmlessness, chemical stability, photocatalytic activity, or whiteness it is increasingly applied in both micro and nano particles and thin films and coating. One of the available procedures for film forming is the sol-gel technology, an inexpensive low temperature process with wide possibilities to vary film properties by changing the composition of the precursor solution or other parameters. In the paper a new precursor polymer for TiO sub(2) film-preparation with high storage and processing stabilities is introduced and applied in thin film forming. The new precursor poly(alkoxytitanate) is prepared by a one step, water-free sol-gel method. A smooth TiO sub(2) film can be prepared using this precursor by spin-coating followed by H sub(2)-plasma curing. Comparing to a common precursor such as Ti(O-iPr) sub(4), this precursor has a good solubility in different solvents and a much higher storage stability. The easy to modify precursor end groups enable the tailoring of properties regarding to hydrolysis to both TiO sub(2) particles and films.