TiOCl_2溶液微波加热制备金红石型TiO_2纳米粒子(英文)

Microwave-assisted Synthesis of Rutile Titania Nanoparticles from TiOCl_2 Aqueous Solution

本文报道了一种由TiOCl2 液相直接合成金红石型TiO2 纳米粒子的新方法 ,即微波诱导沸腾回流强迫水解法 ,用该法制备出常规条件下不能得到的产品。所得产物用粉末X射线衍射仪和透射电子显微镜表征 ,证明产物为金红石型 ,粒子尺寸 5～ 30nm可控。研究表明 ,产物物相取决于Ti4+ 的初始水解速率 ,水解速率越快 ,越有利于金红石相成核 ;通过控制初始Ti4+ 的浓度 ,可改变纳米TiO2 的粒径。另外还讨论了该金红石型TiO2 纳米粒子的成核机理。

Rutile TiO_2 nanoparticles of controled size were prepared by a very simple forced hydrolysis from TiOCl_2 aqueous solution using microwave irradiation. The products were analyzed by X-ray diffraction (XRD) and transmission electron microscopy (TEM). The TiO_2 particles produced from the present route have spherical structure. The influence of heating power on TiOCl_2 solution hydrolytic process was studied and a possible nucleation mechanism of rutile TiO_2 nanoparticles was discussed.