静电纺丝技术制备掺Tb^(3+)的LaF_3/LaOF复合纳米纤维与表征

Preparation and characterization of Tb^(3+)-doped LaF_3/LaOF composite nanofibers by electrospinning technology

采用静电纺丝技术,以La(NO3)3、NH4F、PVP、Tb4O7和无水乙醇为原料,制备了[LaF3+Tb(NO3)3]/PVP复合纤维。将[LaF3+Tb(NO3)3]/PVP复合纤维在600℃焙烧10h,获得了晶态的掺Tb3+的LaF3/LaOF复合纳米纤维。采用热重-差热、X射线衍射、扫描电镜、荧光光谱等分析手段对制得的复合纳米纤维进行了表征。结果表明:所得产物为掺Tb3+的晶态LaF3/LaOF复合纳米纤维,平均直径为150nm,长度>50μm。

With lanthanum nitrate, ammonium fluoride, PVP ,Tb^O7 and absolute ethanol as the starting materials, Tb3＋-doped LaF3/LaOF composite nanofibers have been successfully synthesized by the electrospinning technology. Nauocrystalline Tb3＋-doped LaF3/LaOF composite nanofibers have been synthesized by calcination of the as-prepared composite nanofibres at 600℃ for 10h. The fiber structures are characterized by TG-DTA, XRD, SEM and FS. The results indicate that Tb3＋-doped LaFy/LaOF composite nanofibers with an average diameter of 150 nm are prepared and the lengths of the as-prepared nanofibers is greater than 50μm.