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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

Fabrication of Phase-pure Rutile Nanocrystal by Sol-hydrolysis of TiCl4 in Aqueous Solution at 95 ℃ Only
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摘要 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. 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.
作者 李国华 郑遗凡 马淳安 LI Guo-Hua*,1,2 ZHENG Yi-Fan2 MA Chun-An1,2 (1Research Center of Nano Sci. & Tech., School of Chemical Engineering and Materials Science, Zhejiang University of Technology, Hangzhou 310014) (2Breeding Base of State Key Laboratory of Green Chemistry-Synthesis Technology, Hangzhou 310014)
出处 《无机化学学报》 SCIE CAS CSCD 北大核心 2005年第8期 1231-1236,共6页 Chinese Journal of Inorganic Chemistry
基金 国家自然科学基金,浙江省自然科学基金
关键词 纯相 金红石 纳米晶 溶胶水解 四氯化钛 phase pure rutile nanocrystal sol-hydrolysis titanium tetrachloride
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