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Preparation of Nano Bi12TiO20 Powders and Their Optical Absorption Characteristic
Zhou Aiqiu,Xu Xiaohong*,Yao Weifeng,Zeng Fanliang,Song Bangqiang
Author NameAffiliationE-mail
Zhou Aiqiu School of Chemistry and Chemical EngineeringShangdong UniversityJinan 250100  
Xu Xiaohong* School of Chemistry and Chemical EngineeringShangdong UniversityJinan 250100 xhxu@sdu.edu.cn 
Yao Weifeng State Key Laboratory of Crystal MaterialsShangdong UniversityJinan 250100  
Zeng Fanliang School of Chemistry and Chemical EngineeringShangdong UniversityJinan 250100  
Song Bangqiang School of Chemistry and Chemical EngineeringShangdong UniversityJinan 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,许效红*,姚伟峰,曾凡亮,宋邦强
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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