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Preparation of Nano Bi12TiO20 Powders and Their Optical Absorption Characteristic
Zhou Aiqiu1, Xu Xiaohong*1, Yao Weifeng2, Zeng Fanliang1, Song Bangqiang1
1.School of Chemistry and Chemical Engineering,Shangdong University,Jinan 250100;2.State Key Laboratory of Crystal Materials,Shangdong University,Jinan 250100
Abstract:
Nano-cystal Bi12 TiO20 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 Bi12TiO20 naocrystal has been analyzed. The UV-Vis diffuse reflectance spectra of the prepared Bi12TiO20 powders were measured to determine their optical absorption characteristic. The results showed that pure nano-crystal Bi12TiO20 powders could be easily prepared from stoichiometric precursor solutions at the annealing temperature 1550℃. A broad optical absorption band between 560-385 nm (about 2. 2-3. 22 eV)was observed for the prepared nano-crystal Bi12TiO20 powders.
Key words:  Bi12TiO20,Bismuth titanate,Nano powder,Optical absorption characteristic
FundProject:
Bi12TiO20纳米粉体的制备及其光吸收特性研究
周爱秋1, 许效红*1, 姚伟峰2, 曾凡亮1, 宋邦强1
1.山东大学化学与化工学院,济南 250100;2.山东大学晶体材料国家重点实验室,济南 250100
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Bi12TiO20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Bi12TiO20晶相的形成机理. 通过UV-Vis漫反射谱的测定,研究了Bi12TiO20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Bi12TiO20纳米晶粉体,该Bi12TiO20纳米晶粉体呈现了在很宽的波长范围内(560~385 nm)对光的吸收的特性.
关键词:  Bi12TiO20  纳米粉体  钛酸铋  光吸收特性
DOI:10.1088/1674-0068/17/3/305-308
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