were added into a 30 ml autoclave lined by polytetrafluoroethylene and then 5 0 ml of an aqueous solution containing 35 mg 1 mmol of ammonium hydroxide was added to this system the autoclave was sealed placed into a furnace and heated at 160 u00b0 c for 5 hrs after being cooled pale green titanium dioxide nanocrystals were formed in the oil phase the average particle diameter thereof was about 4 5 nm measured by a transmission electron microscope the tem image and particle diameter distribution diagram thereof were shown in fig1 a and 1b 0 172 g 0 6 mmol of methyl titanate 0 5 ml of oleic acid and 10 ml of toluene were added into a 30 ml autoclave lined by polytetrafluoroethylene and then 15 ml of an aqueous solution containing 18 3 mg 0 1 mmol of tributyl amine was added to this system the autoclave was sealed placed into a furnace and heated at 120 u00b0 c for 24 hrs after being cooled pale green titanium dioxide nanocrystals were formed in the oil phase the average particle diameter thereof was 10 nm 0 284 g 1 mmol of propyl titanate 1 0 ml of oleic acid and 10 ml of benzene were added into a 30 ml autoclave lined by polytetrafluoroethylene and then 10 ml of an aqueous solution containing 59 mg 1 mmol of trimethylamine was added to this system the autoclave was sealed.