采用溶剂热法制备了油溶性稀土掺杂上转换纳米粒子NaYF₄∶Yb³⁺,Ho³⁺,并利用TEM、XRD、IR、荧光光谱法等考察了反应温度、反应时间、掺杂比等反应条件对纳米粒子形貌、结构、发光性能的影响。结果表明,在反应温度为300℃、反应时间为50 min、稀土离子掺杂比为NaYF₄∶20% Yb³⁺,2% Ho³⁺条件下,制备出的油溶性NaYF₄∶Yb³⁺,Ho³⁺纳米粒子呈标准六方晶型,尺寸均一、单分散性好,平均粒径为31.55 nm。通过表面配体交换法成功将柠檬酸修饰在其表面,转为亲水性CIT-NaYF₄∶Yb³⁺,Ho³⁺纳米粒子。

NaYF₄∶Yb³⁺,Ho³⁺,oil-soluble rare earth doped up-conversion nanoparticles,are prepared through a solvothermal method.The influences of reaction temperature,reaction time and doping ratio on the morphology,structure and luminescence properties of the nanoparticles prepared are investigated by means of TEM,XRD,IR and fluorescence spectroscopy.Results show that the oil soluble NaYF₄∶Yb³⁺,Ho³⁺ nanoparticles have standard hexagonal crystals with uniform size and good mono-dispersity,and the average particle size is 31.55 nm when reaction temperature is 300℃,reaction time is 50 min,and rare earth ion doping ratio is higher than NaYF₄∶20% Yb³⁺,2% Ho³⁺.Citric acid is successfully modified on the surface of CIT-NaYF₄∶Yb³⁺,Ho³⁺ nanoparticles via surface ligand exchange method.

白安琪(2000-),女,硕士生,研究方向为卫生检验学,774106023@qq.com;孟佩俊(1979-),男,博士,教授,主要从事纳米材料生物传感器构建、环境污染物分析检测方法建立及健康风险评估研究,通讯联系人,mengpeijun79@163.com。