Synthesis of thermally stable, phosphorus-modified titanium oxide nano-crystals by thermal decomposition of titanium alkoxide and phosphoric ester inorganic solvent of high temperature and high pressure

Phosphorous-modified titanium oxide (P-TiO2's) nano-crystals in anatase for m were synthesized by thermal decomposition of mixtures of titanium(IV) iso propoxide and ethyl phosphate in toluene in autoclave at 300 degreesC. Thes e P-TiO2's had high rutile-transformation temperatures and maintained large specific surface areas even at elevated temperatures (550-800 degreesC). F or example, the product prepared from a mixture of Ti/P molar ratio of 19 t ransformed into rutile at around 1000 degreesC, and it possessed a specific surface area of 54 m(2). g(-1), even after calcination at 800 degreesC for 1 h.