Chem. J. Chinese Universities ›› 2022, Vol. 43 ›› Issue (4): 20210850.doi: 10.7503/cjcu20210850

• Inorganic Chemistry • Previous Articles     Next Articles

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)

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

CLC Number: 

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