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Preparing, Characterizing, and Investigating Luminescent Properties of a Series of Long-Lasting Phosphors in a SrO–Al2O3 System: An Integrated and Inquiry-Based Experiment in Solid State Chemistry for the Undergraduate Laboratory

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Experimental Chemical Center, College of Chemistry and Molecular Engineering, Peking University, Beijing 100871, China
Cite this: J. Chem. Educ. 2017, 94, 8, 1157–1162
Publication Date (Web):July 14, 2017
https://doi.org/10.1021/acs.jchemed.6b00211
Copyright © 2017 The American Chemical Society and Division of Chemical Education, Inc.

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    Abstract

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    An integrated and inquiry-based experiment on solid state chemistry is applied to an inorganic chemistry lab course to provide insight into the characteristics of the solid phase reaction. In this experiment, students have the opportunity to synthesize long-lasting phosphors with formula xSrO·yAl2O3:Eu2+, Dy3+, by means of precipitation and high temperature methods, and to characterize them by powder X-ray diffractometry. The luminescent properties of the phosphors are also suitable for investigation by student research teams with the assistance of solid fluorescence analysis. With a change in the Sr/Al ratio of strontium aluminates, the phosphors show distinct emission bands, and with a change in the content of Dy in a certain range, the different data of luminescence intensity and decay time can be obtained. By analyzing the crystal structures and photoluminescence mechanism of products, students can better understand abstract concepts of luminescent solid materials, including nonstoichiometric compounds, extrinsic point defects, crystalline fields in the solid state, band levels, and hole and electron transfer.

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    Cited By

    This article is cited by 9 publications.

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    2. Dominik Diekemper, Wolfgang Schnick, Stefan Schwarzer. Microwave Synthesis of a Prominent LED Phosphor for School Students: Chemistry’s Contribution to Sustainable Lighting. Journal of Chemical Education 2019, 96 (12) , 3018-3024. https://doi.org/10.1021/acs.jchemed.9b00464
    3. Paul C. Stanish, Howard Siu, Pavle V. Radovanovic. Inorganic Phosphors for Teaching a Holistic Approach to Functional Materials Investigation: From Synthesis and Characterization to Applications of Thermo- and Mechanoluminescence. Journal of Chemical Education 2019, 96 (5) , 1008-1014. https://doi.org/10.1021/acs.jchemed.8b00933
    4. William A. Getz, Dannielle A. Wentzel, Max J. Palmer, and Dean J. Campbell . Erasing the Glow in the Dark: Controlling the Trap and Release of Electrons in Phosphorescent Materials. Journal of Chemical Education 2018, 95 (2) , 295-299. https://doi.org/10.1021/acs.jchemed.7b00744
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    7. Helin Wang, Can Liu, Helong Jiang, Zhiliang Guo, Yingping Zheng, Qi Qi, Lixu Lei. A laboratory experiment on preparation of 3PbO·PbSO4·H2O using less solvent solid state reaction for undergraduate students. Education for Chemical Engineers 2023, 43 , 92-99. https://doi.org/10.1016/j.ece.2023.02.003
    8. Ou Hai, Mengkang Pei, Qiang Ren, Xiulan Wu, Enlong Yang, Dong Xu, Jianfeng Zhu. Ag nanoparticles significantly improve the slow decay brightness of SrAl 2 O 4 :Eu 2+ ,Dy 3+ by the surface plasmon effect. Dalton Transactions 2022, 51 (6) , 2287-2295. https://doi.org/10.1039/D1DT03923G
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