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采用静电纺丝技术与高温煅烧工艺相结合,以氧化钐、氧化钇、偏钒酸铵和聚丙烯腈为主要原料,制备稀土离子掺杂的YVO4:Sm3+纳米纤维。利用X射线衍射(XRD)、扫描电子显微镜(SEM)、傅立叶变换红外(FT-IR)、热重-差热(TG-DTA)和荧光光谱(PL)等分析测试手段对所得样品的结构、形貌和荧光光谱性能进行表征。研究结果表明:静电纺丝制备的有机-无机复合纤维的直径在200~250 nm之间,经过900℃热处理后,所得YVO4:Sm3+样品纤维状结构保持完好,直径减至100 nm。掺杂的稀土Sm3+离子在YVO4纤维中显示出特征发射,同时VO3-4和稀土Sm3+离子之间存在能量传递;Sm3+的掺杂浓度为2%(摩尔分数)时发光强度最大。
Electrospinning technology and high temperature calcination process combined with samarium oxide, yttrium oxide, ammonium metavanadate and polyacrylonitrile as the main raw material, preparation of rare earth ion-doped YVO4: Sm3 + nanofibers. The structure of the obtained sample was characterized by XRD, SEM, FT-IR, TG-DTA and PL. Morphology and fluorescence spectra were characterized. The results show that the diameter of the organic-inorganic composite fiber prepared by electrospinning is between 200 and 250 nm. After heat treatment at 900 ℃, the fibrous structure of the obtained YVO4: Sm3 + sample remains intact and the diameter is reduced to 100 nm. The doped rare earth Sm3 + ions show characteristic emission in YVO4 fiber, and there is energy transfer between VO3-4 and rare earth Sm3 + ions. The Sm3 + doping concentration is 2% (mole fraction), the luminescence intensity is the largest.