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95℃水溶液体系中TiCl4溶胶水解法制备纯金红石纳米粉体 预览 被引量:4
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作者 李国华 郑遗凡 马淳安 《无机化学学报》 SCIE CAS CSCD 北大核心 2005年第8期 1231-1236,共6页
Titanium dioxide (TiO2) nanoparticles of rutile phase were synthesized by hydrolysis of TiCl4 at 95 ℃ in aqueous solution. The samples as prepared and calcined at 500 ℃ were characterized by XRD, TG-DTA and TEM. The... Titanium dioxide (TiO2) nanoparticles of rutile phase were synthesized by hydrolysis of TiCl4 at 95 ℃ in aqueous solution. The samples as prepared and calcined at 500 ℃ were characterized by XRD, TG-DTA and TEM. The sample as prepared was of imperfect rutile structure, and its morphology was rod-like with a diameter of 10~20 nm, a length of 20~80 nm and an aspect ratio of 2~4. The structure of the sample calcined at 500 ℃ was a perfect rutile one, and its morphology was rod-like with a diameter of 15~25 nm, a length of 25~105 nm and an aspect ratio of 2~4. These results indicate that calcination temperature has a positive effect on the structure and the size of rutile nanocrystals, and has no effect on the aspect ratio of rutile nanocrystal. A model for the formation mechnism of rutile nanocrystal in aqueous solution under hydrolysis conditions has been proposed. 展开更多
关键词 纯相 金红石 纳米晶 溶胶水解 四氯化钛
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