采用TiCl_4为原料,用水热法合成了二氧化钛纳米粉体,讨论了水热反应条件对二氧化钛粉体结构和微观形貌的影响.结果表明:在0.5～1.0 mol/L TiCl_4, 130～190 ℃, 3～9 h的水热条件下,合成的TiO_2纳米粉体属于金红石相;TiO_2的形貌和尺寸与原料浓度、反应时间和反应温度密切相关,随着原料浓度的增加、反应温度的升高以及反应时间的延长,TiO_2形貌由球形纳米粒子向纳米棒转变,其尺寸也随之增大.
The titanium dioxide powders were hydrothermally synthesized using TiCl_4 as the raw material. The influence of hydrothermal conditions on the crystal structure and the morphology of titanium dioxide powders were studied. The results revealed that the rutile TiO_2 powders could be hydrothermally synthesized by 0.5～1.0 mol/L TiCl_4 at temperatures of 130～190 ℃ for 3～9 h. The morphology and the size of TiO_2 intimately depends on the concentration of raw materials, reaction time, and reaction temperature. The morphology of TiO_2 change from nanosphere to nanorods, and the size of TiO_2 nanorods gradually increases with the increase of concentration, reaction time, and reaction temperature.
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