Synthesis of Thermally Stable, Phosphorus-Modified Titanium Oxide Nano-Crystals by Thermal Decomposition of Titanium Alkoxide and Phosphoric Ester in Organic Solvent of High Temperature and High

Phosphorous-modified titanium oxide (P-TiO2's) nano-crystals in anatase form were synthesized by thermal decomposition of mixtures of titanium (IV) isopropoxide and ethyl phosphate in toluene in autoclave at 300°C. These P-TiO2's had high rutile-transformation temperatures and maintained large specific surface areas even at elevated temperatures (550-800°C). For example, the product prepared from a mixture of Ti/P molar ratio of 19 transformed into rutile at around 1000°C, and it possessed a specific surface area of 54m2·g-1, even after calcination at 800°C for 1h