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Fabrication, characterization, and optimization of the composite long afterglow material Sr2MgSi2O7:Eu2+, Dy3+@ SrAl2O4:Eu2+, Dy3+

  • Original Paper: Sol-gel and hybrid materials for energy, environment and building applications
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Abstract

In order to improve the water resistance of SrAl2O4:Eu2+, Dy3+, the composite long afterglow material Sr2MgSi2O7:Eu2+, Dy3+@ SrAl2O4:Eu2+, Dy3+ was prepared by covering uniform and stable Sr2MgSi2O7 sol on SrAl2O4:Eu2+, Dy3+ powder, which was synthesized via traditional solid-state method. The effects of various factors, such as the amount of ammonia, the molar ratio of Sr2MgSi2O7:SrAl2O4 and the content of H3BO3, on the structure and luminescent properties of Sr2MgSi2O7:Eu2+, Dy3+@ SrAl2O4:Eu2+, Dy3+ were investigated by the response surface method. The results show that the influence extent on both the initial afterglow brightness and water resistance are as follows:the amount of ammonia> the content of H3BO3 > the molar ratio of Sr2MgSi2O7:SrAl2O4. When the amount of ammonia, the molar ratio of Sr2MgSi2O7:SrAl2O4 and the content of H3BO3 is 1.64 mL, 11.10, and 0.006 mol, respectively, both the brightness and water resistance of Sr2MgSi2O7:Eu2+, Dy3+@ SrAl2O4:Eu2+, Dy3+ are improved, the water resistance is 0.835 (51.82% higher than that of pure SrAl2O4) and the initial afterglow brightness can reach 2793 mcd/m2 (91.69% higher than that of pure SrAl2O4), which were in good agreement with the predicted optimum value of 0.867 and 2720 mcd/m2, respectively. Under the optimization conditions, the synergistic action of SrAl2O4 with excellent afterglow properties and Sr2MgSi2O7 with high water resistance plays an important role in improving the water resistance without sacrificing brightness. Finally, the water-based light-emitting inks with SMSA as fluorescent pigment exhibit excellent luminescent properties in the dark.

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Highlights

  • Sr2MgSi2O7@ SrAl2O4 long afterglow luminescent materials were obtained by covering Sr2MgSi2O7 sol on SrAl2O4 matrix.

  • Compared to SrAl2O4, the water resistance of Sr2MgSi2O7@ SrAl2O4 was improved without sacrificing the brightness.

  • The optimized parameters including the amount of ammonia, the molar ratio of SM:SA and the content of H3BO3 were obtained via response surface method.

  • The synergistic action of SrAl2O4 and Sr2MgSi2O7 for improving both the brightness and water resistance is successfully verified.

  • The water-based inks with Sr2MgSi2O7:Eu2+, Dy3+@ SrAl2O4:Eu2+, Dy3+ as fluorescent pigment exhibit excellent luminescent properties.

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Acknowledgements

This work was financially supported by the Undergraduate Training Program for Innovation and Entrepreneurship of Tianjin (Grant No. 201810058070), and Tianjin Technical and Engineering Center of Nonwovens (No. KF202106).

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Authors and Affiliations

  1. Tianjin Key Laboratory of Advanced Fiber Materials and Energy Storage Technology, School of Materials Science and Engineering, Tiangong University, Tianjin, 300387, PR China

    Anding Huang, Yikun Wu, Zixin Pan, Bangyu Wang & Xiaoping Liang

  2. CAS Key Laboratory of Materials for Energy Conversion, Department of Materials Science and Engineering, University of Science and Technology of China, Hefei, Anhui, 230026, PR China

    Anding Huang

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Huang, A., Wu, Y., Pan, Z. et al. Fabrication, characterization, and optimization of the composite long afterglow material Sr2MgSi2O7:Eu2+, Dy3+@ SrAl2O4:Eu2+, Dy3+. J Sol-Gel Sci Technol 105, 500–510 (2023). https://doi.org/10.1007/s10971-022-05989-5

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