摘要
利用溶剂热法合成了稀土掺杂上转换纳米材料Na Gd F_(4):Yb^(3+)/Er^(3+),考察了稀土离子掺杂比例、反应时间、反应温度与氟离子掺杂浓度等实验条件对纳米材料的形貌、粒径、稳定性以及荧光强度的影响。通过配体交换法使聚丙烯酸(PAA)与材料表面疏水油酸分子交换,合成亲水性PAA-Na Gd F_(4):Yb^(3+)/Er^(3+)纳米晶。通过X射线衍射、透射电镜、傅里叶红外光谱、Zeta电位对纳米晶进行表征。结果表明,在稀土离子掺杂比为Gd78%:Yb20%:Er2%,反应温度300℃,反应时间60 min,氟离子掺杂浓度2 mmol/L的条件下,合成的Na Gd F_(4):Yb^(3+)/Er^(3+)呈标准六方相,单分散性良好,尺寸均一,直径约为25 nm;在980 nm近红外光激发下,在542 nm处发出明亮绿色光。PAA成功取代油酸修饰在Na Gd F_(4):Yb^(3+)/Er^(3+)表面,PAA-Na Gd F_(4):Yb^(3+)/Er^(3+)纳米晶仍为六方晶型,分散性良好,尺寸约为45 nm,同样在542 nm处发出明亮绿色荧光。
The rare earth doped upconversion nanomaterial Na Gd F_(4):Yb^(3+)/Er^(3+) was synthesized by solvothermal method,the effects of rare earth ion doping ratio,interaction time,performing temperature,as well as fluorine ion doping concentration on the morphology,particle size,stability and fluorescence intensity of the nanomaterial were orderly investigated.Subsequently,the hydrophilic polyacrylic acid (PAA) based nanocrystals (PAA-Na Gd F_4:Yb^(3+)/Er^(3+)) were synthesized by exchanging PAA with hydrophobic oleic acid molecules on the surface of the material by ligand exchange method.The nanocrystals were characterized by X-ray diffraction,transmission electron microscopy,Fourier transform infrared spectroscopy,and Zeta potential.The results indicated that the synthesized Na Gd F_(4):Yb^(3+)/Er^(3+) was standard hexagonal with favorable monodispersity and uniform size which the diameter is about 25 nm under the conditions including rare earth ion doping ratio of Gd78%:Yb20%:Er2%,reaction temperature of 300℃,reaction time of 60 min,and fluoride ion doping concentration of 2 mmol.Under near-infrared excitation at 980 nm,a bright green emitted light was observed at 542 nm.The oleic acid was replaced by PAA to be modified on the surface of Na Gd F_4:Yb^(3+)/Er^(3+),and the nanocrystals retained the original hexagonal crystal form,possessing satisfied dispersion with size of about 45 nm,and emitted bright green fluorescence at 542 nm.
作者
孟颖
殷慧
白安琪
彭孔浩
宿欣瑶
杨金玉
罗利霞
张凌燕
李淑荣
孟佩俊
MENG Ying;YIN Hui;BAI Anqi;PENG Konghao;SU Xinyao;YANG Jinyu;LUO Lixia;ZHANG Ling-yan;LI Shurong;MENG Peijun(Public Health School,Baotou Medical College,Inner Mongolia University of Science and Technology,Baotou 014040,China;Engineering Technology Center of Hygienic Inspection and Assessment of Inner Mongolia Autonomous Region,Baotou 014040,China)
出处
《分析试验室》
EI
CAS
CSCD
北大核心
2024年第11期1529-1537,共9页
Chinese Journal of Analysis Laboratory
基金
国家自然科学基金项目(81960601,82360656)
内蒙古自治区高等学校青年科技英才支持项目(NJYT23026)
内蒙古自治区自然科学基金(2023MS08009,2021MS08055)
内蒙古自治区卫生健康委医疗卫生科技计划项目(202201383)
包头医学院研究生科研创新项目(bycx2023006)
内蒙古自治区大学生创新创业训练计划项目(S202310130001)资助。
关键词
稀土掺杂上转换纳米材料
溶剂热法
聚丙烯酸
rare earth doped upconversion nanomaterials
solvothermal method
polyacrylic acid
