液相水解制备纳米TiO2的XRD和TEM研究

Nano-titanium dioxide powder with good dispersivity and small particle size was prepared through liquid-phase hydrolysis from titanium tetrachloride and n-octanol. The factors affecting the nature of titanium dioxide were studied by XRD and TEM. The results show that with the calcination temperature rising, the nano-TiO2 particle becomes larger, and the dispersivity is worse. The crystal pattern changes from anatase phase to rutile phase at higher temperature. The calcination time affects slightly the nano-TiO2 particle size and the crystal pattern, but it affects intensely nano-TiO2 dispersivity. When the titanium tetrachloride concentration increases, the particle size becomes smaller, but dispersivity becomes worse. When the hydrolysis temperature increases, the nano-TiO2 particle size becomes larger, and the dispersivity becomes worse.