高等学校化学学报 ›› 2022, Vol. 43 ›› Issue (4): 20210850.doi: 10.7503/cjcu20210850

• 无机化学 • 上一篇    下一篇

Cr,In共掺杂MgGa2O4小尺寸近红外长余辉纳米颗粒的制备及发光性能

孙雪峰, 热娜古丽·阿不都热合曼(), 杨通胜, 杨倩婷   

  1. 新疆特色药食用植物资源化学实验室, 喀什大学化学与环境科学学院, 喀什 844006
  • 收稿日期:2021-12-22 出版日期:2022-04-10 发布日期:2022-03-15
  • 通讯作者: 热娜古丽·阿不都热合曼 E-mail:renagul111@aliyun.com
  • 基金资助:
    国家自然科学基金(21867014);新疆维吾尔自治区“天山青年”计划科技人才培养项目(2017Q086);喀什大学高层次人才科研启动经费(GCC18ZK-003)

Synthesis and Luminescence Properties of Cr,In Co-doped Small Size MgGa2O4 Near-infrared Persistent Luminescence Nanoparticles

SUN Xuefeng, RENAGUL Abdurahman(), YANG Tongsheng, YANG Qianting   

  1. Laboratory of Xinjiang Native Medicinal and Edible Plant Resources Chemistry,College of Chemistry and Environmental Science,Kashi University,Kashi 844006,China
  • Received:2021-12-22 Online:2022-04-10 Published:2022-03-15
  • Contact: RENAGUL Abdurahman E-mail:renagul111@aliyun.com
  • Supported by:
    the National Natural Science Foundation of China(21867014);the Science and Technology Talents Training Project of “Tianshan Youth” Program of Xinjiang Uygur Autonomous Region, China(2017Q086);the Research Start-up Fund for High-level Talents of Kashgar University, China(GCC18ZK-003)

摘要:

采用乙二醇辅助共沉淀法制备了小尺寸Cr,In共掺杂MgGa2O4(MGO∶Cr, In)近红外长余辉发光纳米粒子(Persistent luminescence nanoparticles, PLNPs), 并考察了Cr, In共掺杂及煅烧温度对MGO晶体结构、 余辉发光性质和尺寸的影响. 结果表明, 最优Cr, In共掺杂浓度分别为0.3%和0.02%, MGO∶Cr, In晶体属于Fd3m空间群, Cr, In共掺杂对纳米颗粒的结构无影响, 平均粒径为(8.61±2.23) nm, 分散性良好, 最佳煅烧温度为700 ℃. 并且, In掺杂可有效延长其余辉发光寿命, 平均发光寿命(τav)从49.33 s增大至52.89 s; 荧光量子产率增高至44.9%; 活化能Ea为(0.36±0.04) eV, 具有良好的热稳定性; 陷阱深度为0.696 eV. 此外, 该PLNPs分别在260 nm、410 nm和600 nm处有激发峰, 表明UV光、 蓝绿光以及红光皆可实现对其的激发, 发射波长皆位于705 nm处, 属于Cr3+2E(2G)→4A2(4F)跃迁. 该PLNPs在红色LED灯、 光学储器件以及生物医学等领域具有巨大潜在应用价值.

关键词: 共沉淀法, 小尺寸, Cr, In共掺杂, 长余辉纳米颗粒

Abstract:

Cr, In co-doped MgGa2O4 persistent luminescence nanoparticles(PLNPs) with small-size were prepared by ethylene glycol assisted co-precipitation. The influence of Cr,In co-doping and calcination temperature on the MGO crystal structure, afterglow luminescence properties and size were further investigated. The results showed that the optimal Cr,In co-doped concentrations were 0.3% and 0.02%, respectively, and the samples belonged to Fd3m space group, Cr,In co-doping had no effect on the structure of the samples. The PLNPs had a good water dispersibility with an average particle size of (8.61±2.23) nm and the optimum calcination temperature of 700 ℃. Moreover, the afterglow decay life was prolonged by In doping, and the average luminescence life(τav) of the afterglow decay fitting curves increased from 49.33 s to 52.89 s with the QY increased to 44.9%. The activation energy(Ea) was (0.36±0.04) eV. The PLNPs had a good thermal stability, and the trap depth was 0.696 eV. Moreover, the PLNPs had three excitation bands at 260, 410 and 600 nm, respectively, which indicated that UV light, blue-green light and red light could be excited, and the emission wavelength was all at 705 nm, belonged to the 2E2G)→4A24F) transition of Cr3+. Therefore, the PLNPs had a great potential application value in red LED lamps, optical storage devices and biomedical fields.

Key words: Co-precipitation, Small-size, Cr, In co-doping, Persistent luminescence nanoparticles

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