【摘要】 以钛酸四丁酯和硝酸铋为原料 ,利用化学溶液分解法制备了Bi12 TiO2 0 纳米多晶粉体 .采用XRD和TEM对其结构和形貌进行了表征 .结合热重 差热 (TG DTA)分析 ,探讨了Bi12 TiO2 0 晶相的形成机理 .通过UV Vis漫反射谱的测定 ,研究了Bi12 TiO2 0 纳米晶粉体的光吸收特性 .结果显示 ,从组成为化学计量比的前驱液中可以很容易制得纯Bi12 TiO2 0 纳米晶粉体 ,该Bi12 TiO2 0 纳米晶粉体呈现了在很宽的波长范围内 (5 6 0～ 385nm )对光的吸收的特性 .更多还原

【Abstract】 Nano-cystal Bi 12TiO 20 powders have been prepared by the chemical solution decomposition (CSD) method using bismuth nitrate and titanium butoxide as the starting precusors. The powders were characterized by the thermogravimetry and differential thermal analysis (TG-DTA), X-ray diffractometry (XRD) and transmission electron microscopy (TEM). The formation mechanism of Bi 12TiO 20 naocrystal has been analyzed. The UV-Vis diffuse reflectance spectra of the prepared Bi 12TiO 20 powders were measured to determine their optical absorption characteristic. The results showed that pure nano-crystal Bi 12TiO 20 powders could be easily prepared from stoichiometric precursor solutions at the annealing temperature ≥550℃. A broad optical absorption band between 560～385 nm (about 2.2～3.22 eV) was observed for the prepared nano-crystal Bi 12TiO 20 powders.更多还原