摘要
采用静电纺丝技术制备了PVP/[Y(NO_3)_3+Al(NO_3)_3+Nd(NO_3)_3]复合纳米纤维,将其进行热处理,获得了Nd^(3+)∶YAG发光纳米纤维。X射线衍射(XRD)分析表明,该复合纳米纤维为非晶态,经900℃焙烧10 h后,获得了单相石榴石型的Nd^(3+)∶YAG纳米纤维。扫描电子显微镜(SEM)分析表明,经过900℃焙烧后,获得了直径约75 nm的Nd^(3+)∶YAG纳米纤维,长度大于100μm。热分析(TG-DTA)表明,当焙烧温度高于550℃时,该复合纳米纤维中二甲基甲酰胺(DMF)、有机物和硝酸盐分解挥发完毕,样品不再失重,总失重率为84.7%。傅里叶变换红外光谱(FTIR)分析表明,当焙烧温度为900℃时,生成了Nd^(3+)∶YAG发光纳米纤维。对Nd^(3+)∶YAG纳米纤维的发光性质进行了研究,对Nd^(3+)∶YAG发光纳米纤维的形成机理进行了讨论。该技术可以用来制备其他稀土石榴石型化合物纳米纤维。
PVP/[Y（NO3 ）3 ＋Al（NO3）3 ＋ Nd（NO3）3 ] composite fibers are prepared by electrospinning, and Nd^3＋ ： YAG nanofibers are fabricated by calcination of the prepared composite nanofibers. X-ray diffraction （XRD） results show that the composite nanofibers are amorphous in structure, and pure phase Nd^3＋ ： YAG nanofibers are obtained by calcination of the composite fibers at 900 ℃ for 10 h. Scanning electron microscope （SEM） analysis indicates that the diameter of the prepared Nd^3＋ ： YAG nanofibers is about 75 nm, and the length is greater than 100 μm. Thermogravimetry and differential thermal analysis （TG-DTA） analysis reveals that the dimethylfomamide （DMF）, organic compands, and nitrate salts in the composite nanofibers are decomposed and volatilized totally, the weight of the sample keeps constant when sintering temperature is above 550 ℃, and the total weight loss percentage is 84. 7 %. Fourier transform infrared spectrometer （FTIR） analysis manifestes that polycrystalline Nd^3＋ ： YAG luminescant nanofibers are formed at 900 ℃. The luminescent property of Nd^3＋ ： YAG nanofibers is investigated. The formation mechanism of the Nd^3＋： YAG nanofibers is preliminarily discussed. This method can be applied to prepare other rare earths garnet-typed compound nanofibers.
出处
《中国激光》
EI
CAS
CSCD
北大核心
2009年第6期1517-1522,共6页
Chinese Journal of Lasers
基金
吉林省科技发展计划(20060504
20040125)
吉林省教育厅科技计划(2005109
2006JYT05)
吉林省环保局科 技项目(2006-24)资助课题
