Method for preparing europium-doped octafluoro yttrium barium red luminescent nano-fiber

The invention relates to a preparation method of europium-doped octafluoro yttrium barium red luminescent nano-fiber, and belongs to the technical field of nano-grade material preparation. The method comprises four steps that: (1) a spinning liquid is prepared; (2) PVP/[Ba(NO3)2+Y(NO3)3+Eu(NO3)3] composite fiber is prepared with an electro-spinning technology; (3) mixed oxide nano-fiber is prepared, wherein the composite fiber is subjected to a heat treatment, such that the mixed oxide nano-fiber is prepared; and (4) BaY2F8:7% Eu red luminescent nano-fiber is prepared, wherein a double-crucible method is adopted, and the mixed oxide nano-fiber is subjected to a fluorination treatment by using ammonium bifluoride, such that the BaY2F8:7% Eu red luminescent nano-fiber is prepared. The nano-fiber has good crystallinity, a diameter of 123.9nm (plus or minus 12.3nm), and a length greater than 50mum. The method provided by the invention is simple and feasible, and can be used in batch productions. Therefore, the method has good application prospect.