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GdPO4:Sm3+ phosphor:Optimization of calcination temperature and doping concentration and fluorescence and magnetic properties
Author NameAffiliationE-mail
WU Jin-Xiu School of Materials and Metallurgy, Inner Mongolia University of Science and Technology, Baotou, Inner Mongolia 014010, China
Key Laboratory of Green Extraction and Efficient Utilization of Light Rare Earth Resources, Ministry of Education, Baotou, Inner Mongolia 014010, China
Key Laboratory of Rare Earth Hydrometallurgy and Light Rare Earth Application, Inner Mongolia Autonomous Region, Baotou, Inner Mongolia 014010, China 		m13674773965@163.com 
WANG Qian-Qian School of Materials and Metallurgy, Inner Mongolia University of Science and Technology, Baotou, Inner Mongolia 014010, China
Key Laboratory of Green Extraction and Efficient Utilization of Light Rare Earth Resources, Ministry of Education, Baotou, Inner Mongolia 014010, China
Key Laboratory of Rare Earth Hydrometallurgy and Light Rare Earth Application, Inner Mongolia Autonomous Region, Baotou, Inner Mongolia 014010, China 		 
WU Bao-Long School of Materials and Metallurgy, Inner Mongolia University of Science and Technology, Baotou, Inner Mongolia 014010, China
Key Laboratory of Green Extraction and Efficient Utilization of Light Rare Earth Resources, Ministry of Education, Baotou, Inner Mongolia 014010, China
Key Laboratory of Rare Earth Hydrometallurgy and Light Rare Earth Application, Inner Mongolia Autonomous Region, Baotou, Inner Mongolia 014010, China 		 
LIU Zhao-Gang School of Materials and Metallurgy, Inner Mongolia University of Science and Technology, Baotou, Inner Mongolia 014010, China
Key Laboratory of Green Extraction and Efficient Utilization of Light Rare Earth Resources, Ministry of Education, Baotou, Inner Mongolia 014010, China
Key Laboratory of Rare Earth Hydrometallurgy and Light Rare Earth Application, Inner Mongolia Autonomous Region, Baotou, Inner Mongolia 014010, China 		 
HU Yan-Hong School of Materials and Metallurgy, Inner Mongolia University of Science and Technology, Baotou, Inner Mongolia 014010, China
Key Laboratory of Green Extraction and Efficient Utilization of Light Rare Earth Resources, Ministry of Education, Baotou, Inner Mongolia 014010, China
Key Laboratory of Rare Earth Hydrometallurgy and Light Rare Earth Application, Inner Mongolia Autonomous Region, Baotou, Inner Mongolia 014010, China 		 
QI Yuan-Hao School of Materials and Metallurgy, Inner Mongolia University of Science and Technology, Baotou, Inner Mongolia 014010, China
Key Laboratory of Green Extraction and Efficient Utilization of Light Rare Earth Resources, Ministry of Education, Baotou, Inner Mongolia 014010, China
Key Laboratory of Rare Earth Hydrometallurgy and Light Rare Earth Application, Inner Mongolia Autonomous Region, Baotou, Inner Mongolia 014010, China 		 
ZHANG Xiao-Wei School of Materials and Metallurgy, Inner Mongolia University of Science and Technology, Baotou, Inner Mongolia 014010, China
Key Laboratory of Green Extraction and Efficient Utilization of Light Rare Earth Resources, Ministry of Education, Baotou, Inner Mongolia 014010, China
Key Laboratory of Rare Earth Hydrometallurgy and Light Rare Earth Application, Inner Mongolia Autonomous Region, Baotou, Inner Mongolia 014010, China 		 
FENG Fu-Shan School of Materials and Metallurgy, Inner Mongolia University of Science and Technology, Baotou, Inner Mongolia 014010, China
Key Laboratory of Green Extraction and Efficient Utilization of Light Rare Earth Resources, Ministry of Education, Baotou, Inner Mongolia 014010, China
Key Laboratory of Rare Earth Hydrometallurgy and Light Rare Earth Application, Inner Mongolia Autonomous Region, Baotou, Inner Mongolia 014010, China 		 
LI Jian-Fei School of Materials and Metallurgy, Inner Mongolia University of Science and Technology, Baotou, Inner Mongolia 014010, China
Key Laboratory of Green Extraction and Efficient Utilization of Light Rare Earth Resources, Ministry of Education, Baotou, Inner Mongolia 014010, China
Key Laboratory of Rare Earth Hydrometallurgy and Light Rare Earth Application, Inner Mongolia Autonomous Region, Baotou, Inner Mongolia 014010, China 		 
Abstract: Nano-phosphor precursors were synthesized with GdPO4 as the matrix and Sm3+ as the activator using the hydrothermal synthesis method. The precursors were calcinated at 800, 900, 1 000, 1 100, and 1 200℃ respectively, thus obtaining GdPO4:Sm3+ phosphors. Firstly, the optimal calcination temperature of GdPO4:Sm3+ was optimized. Then the effect of Sm3+ doping amount on the fluorescence properties of GdPO4:Sm3+ was studied. The hightemperature fluorescence and magnetic properties of the best product were studied in detail. The crystal structure, morphology, luminescence, and magnetic properties of the phosphors were characterized using an X-ray diffractometer (XRD), scanning electron microscope (SEM), magnetometer, and fluorescence spectrophotometer (FL). The results indicate that the crystal structure of phosphors was changed from the precursor GdPO4·H2O:Sm3+ in the hexagonal crystal system to GdPO4:Sm3+ in the monoclinic crystal system. The morphology was changed from nanorods to like-sphere particles. The luminous intensity and phosphorescence lifetime of the phosphors attained their highest levels when the calcination temperature was 1 000℃ and the Sm3+ doping concentration was 2%. The type of energy transferred between Sm3+ in GdPO4:2%Sm3+ was electric dipole-electric dipole interaction, and the critical distance of energy transfer was about 1.646-1.884 nm. The optimal product GdPO4:2%Sm3+ had excellent thermal stability, with the thermal quenching activation energy as -0.157 eV. Moreover, it had good paramagnetism, with a mass susceptibility of 1.22×10-4 emu·g-1·Oe-1.
Keywords: GdPO4:Sm3+  calcination temperature  quenching mechanism of concentration  fluorescence properties  magnetic properties
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WU Jin-Xiu,WANG Qian-Qian,WU Bao-Long,LIU Zhao-Gang,HU Yan-Hong,QI Yuan-Hao,ZHANG Xiao-Wei,FENG Fu-Shan,LI Jian-Fei.GdPO4:Sm3+ phosphor:Optimization of calcination temperature and doping concentration and fluorescence and magnetic properties[J].Chinese Journal of Inorganic Chemistry,2023,39(6):1179-1192.
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Chinese Journal of Inorganic Chemistry