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采用微波加热均匀沉淀法,以钛液为原料、尿素为沉淀宿主制备了锐钛矿型的纳米TiO2。利用XRD和TEM表征了粉体的晶体结构和形貌。研究了微波功率、微波辐射的连续性以及尿素配比(钛和尿素的摩尔比)对产品产量和粒径的影响。实验表明其他参数不变的条件下,微波功率越大、连续性越高、尿素配比越大,收率越高,但TiO2的粒径变化不明显。
The anatase-type nano-TiO2 was prepared by using microwave heating and homogeneous precipitation method, using titanium solution as the raw material and urea as the precipitation host. The crystal structure and morphology of the powders were characterized by XRD and TEM. The effects of microwave power, microwave radiation continuity, and urea ratio (molar ratio of titanium and urea) on product yield and particle size were studied. Experiments show that the other parameters unchanged under the conditions of the microwave power is larger, the higher the continuity, the greater the urea ratio, the higher the yield, but the change of TiO2 particle size is not obvious.