光致发光
钛酸铋
材料科学
透射电子显微镜
正交晶系
退火(玻璃)
高分辨率透射电子显微镜
扫描电子显微镜
热液循环
铋
化学工程
分析化学(期刊)
纳米技术
结晶学
晶体结构
光电子学
化学
铁电性
复合材料
冶金
工程类
色谱法
电介质
作者
Haibin Gu,Zhenglong Hu,Yongming Hu,Ying Yuan,Jin Seon You,Weidong Zou
标识
DOI:10.1016/j.colsurfa.2007.08.010
摘要
Bismuth titanate (Bi4Ti3O12) nanoplates were synthesized by polyethylene glycol-assisted hydrothermal method at 200 °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 photoluminescence. 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.
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