The structure and photoluminescence of Bi4Ti3O12 nanoplates synthesized by hydrothermal method
The structure and photoluminescence of Bi4Ti3O12 nanoplates synthesized by hydrothermal method
复制标题
水热法合成Bi4Ti3O12纳米片的结构及光致发光
DOI：
10.1016/j.colsurfa.2007.08.010
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发表时间：
2008-02-15
影响因子：
5.2
通讯作者：
Zou, Weidong
中科院分区：
文献类型：
--
作者：
Gu, Haoshuang;Hu, Zhenglong;Zou, Weidong
采用聚乙二醇辅助水热法在200℃下合成了钛酸铋（Bi4Ti3O12）纳米片，并对制备的样品进行了x射线粉末衍射、扫描电镜、透射电镜、高分辨率透射电镜和室温光致发光等表征。所制备的Bi4Ti3O12纳米板为单晶、正交钙钛矿结构，平均边缘尺寸约为200 nm，厚度为10 ~ 20 nm。在室温下观察到一条以470.4 nm为中心的蓝绿色光致发光带。退火温度对室温可见光发射的影响研究表明，退火温度或晶粒尺寸对蓝绿光发射强度有重要影响，而氧空位可能是造成这种发射的原因。(c) 2007 Elsevier B.V.版权所有
Bismuth titanate (Bi4Ti3O12) nanoplates were synthesized by polyethylene glycol-assisted hydrothermal method at 200 degrees C. The as-prepared samples were investigated by X-ray powder diffraction, scanning electron microscopy, transmission electron microscopy, high-resolution transmission electron microscopy and the room-temperature photolummescence. The Bi4Ti3O12 nanoplates are single crystalline and orthorhombic perovskite structure with the average rim sizes of about 200 nm and thickness of 10-20 nm. One blue-green photoluminescence band centered at around 470.4 nm was observed at room temperature. The investigation of the effects of the annealing temperatures on room-temperature visible emission showed that the annealing temperatures or grain size play important roles for the intensities of blue-green light emission, and the oxygen vacancies should be responsible for this emission. (c) 2007 Elsevier B.V. All rights reserved.