Upconversion luminescent (UCL) materials have unique advantages in multicolor bio-imaging and anti-counterfeiting. Bismuth-based oxide possess merits of stable chemical structure, low cost, and corrosion resistance. In this paper, the Bi₂Ti₂O₇:Yb³⁺/Eu³⁺ nanofibers were successfully prepared via electrospinning process. The length of the obtained nanofibers is several hundred microns and the diameter are about 130 nm. The UCL properties of nanofibers were studied under excitation of 980 nm laser. The results revealed that the nanofibers emitted bright orange to green light when the doping concentration increases from 1:1 to 20:1. The work will not only promote the development of bismuth-based oxides among upconversion materials, but also promote the application of one-dimensional nanofibers in the fields of bioimaging and anti-counterfeiting.

上转换发光（UCL）材料在多色生物成像和防伪方面具有独特的优势。铋基氧化物具有化学结构稳定，成本低廉和耐腐蚀的优点。本文成功制备了Bi ₂ Ti ₂ O ₇：Yb ³⁺ / Eu ³⁺纳米纤维。静电纺丝过程。所获得的纳米纤维的长度为几百微米，并且直径为约130nm。在980nm激光激发下研究了纳米纤维的UCL性能。结果表明，当掺杂浓度从1：1增加到20：1时，纳米纤维会发出亮橙色至绿色的光。这项工作不仅将促进上转换材料中铋基氧化物的发展，而且还将促进一维纳米纤维在生物成像和防伪领域的应用。