摘要
采用静电纺丝制备了非晶态的PVP(polyvinyl pyrrolidone)/[Y(NO3)3+Al(NO3)3+Tb(NO3)3]复合纳米纤维,经900℃焙烧10 h后,获得了单相石榴石型的Y3Al5O12∶Tb3+(简称YAG∶Tb3+)发光纳米纤维,直径约70 nm,长度大于100μm.当焙烧温度高于550℃时,复合纳米纤维中水分、有机物和硝酸盐分解挥发完毕,样品不再失重,总失重率为86.7%.YAG∶Tb3+发光纳米纤维在273 nm的紫外光激发下,发射出Tb3+离子特征的543 nm的明亮绿光.讨论了YAG∶Tb3+发光纳米纤维的形成机理.该技术可以用来制备其他石榴石型化合物纳米纤维.
PVP（polyvinyl pyrrolidone）/[Y（NO3）3＋Al（NO3）3＋Tb（NO3）3] non-crystalline composite fibers were synthesized by electrospinning,and pure phase garnet-typed Y3Al5O12∶Tb3＋（denoted as YAG∶Tb3＋ for short） luminescent nanofibers were fabricated by calcinating the obtained composite nanofibers at 900 ℃ for 10 h.The diameter of YAG∶Tb3＋ nanofibers was ca.70 nm,and the length was greater than 100 μm.The water,organic compounds and nitrate salts in the prepared composite nanofibers were decomposed and volatilized totally,and the mass of the sample kept constant when the sintering temperature was above 550 ℃,and the total weight loss percentage was 86.7%.YAG∶Tb3＋ luminescent nanofibers emitted bright green light of 543 nm in a wavelength of Tb3＋ ion characteristic emission under the excitation of 273 nm ultraviolet ray.The formation mechanism of YAG∶Tb3＋ luminescent nanofibers was discussed.This method can be applied to prepare other rare earth garnet-typed compound nanofibers.
出处
《湖南大学学报（自然科学版）》
EI
CAS
CSCD
北大核心
2010年第10期77-82,共6页
Journal of Hunan University:Natural Sciences
基金
国家自然科学基金资助项目(50972020)
吉林省科技发展计划重大项目(20070402
20060504)
教育部科学技术研究重点项目(207026)
长春市科技计划项目(2007045)
吉林省教育厅"十一五"科学技术研究项目(2007-45
2006JYT05)
