【摘要】 针对高生物毒性氚化水的检测需求，无机纳米闪烁体提供了一种新的解决思路。采用水热法合成了CaF₂:Eu²⁺纳米颗粒，结合XRD、SEM、FS等表征手段，对比了水热反应条件对粉体物相组成、微观形貌、光学性能的影响。结果表明，所获样品均为立方结构的纯相CaF₂,近球形颗粒分散良好，平均粒径约30 nm。CaF₂:Eu²⁺纳米粉体在339 nm紫外光激发下显示出425 nm的特征发射峰，在180℃、24 h条件下具有最佳的发射强度。更多还原

【Abstract】 Inorganic nanoscintillators exhibit a promising innovaion for the detection of tritiated water with highly biotoxicity. In this work, CaF₂: Eu²⁺ nanoparticles were synthesized via hydrothermal method. The effects of reaction conditions on phase composition, microstruture and luminescence properties of nanopowders have been characterized by XRD, SEM and FS. The results show that the obtained nanoparticles are the pure CaF₂ phase with cubic structure. The nearly spherical particles are well dispersed with an average size of about 30 nm. CaF₂: Eu²⁺ nanopowders exhibit an emission peak of 425 nm under 339 nm UV excitation, and own the optimal emission intensity at the reaction condition of 180 ℃ and 24 h.更多还原