Reduction of Eu~(3+) to Eu~(2+) in NaCaPO_4:Eu phosphors prepared in a non-reducing atmosphere

Bhaskar Kumar Grandhe; Vengala Rao Bandi; Kiwan Jang

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Reduction of Eu~(3+) to Eu~(2+) in NaCaPO_4:Eu phosphors prepared in a non-reducing atmosphere

机译：在非还原气氛中制备的NaCaPO_4：Eu荧光粉中Eu〜（3+）还原为Eu〜（2+）

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The reduction of Eu~(3+) to Eu~(2+) in a non-reducing atmosphere of pure argon gas has been reported for the first time in NaCaPO_4 host matrix prepared by using a solid-state reaction. Photoluminescence spectral profiles confirmed the presence of Eu~(2+) ions in the prepared compound and this reduction has been explained by means of a charge compensation model. The effect of lithium incorporation on the photoluminescence efficiency of the NaCaPO_4 :Eu~(2+) phosphors were also studied and explained appropriately for various doping concentrations of lithium ions. The CIE coordinates and temperature dependant luminescence profiles of these phosphors were also discussed in order to investigate their potential applications. Besides analyzing its photoluminescence properties, other significant characterizations like XRD, SEM, TG-DTA, FT1R, Raman spectral profiles have also been studied and these interpretations were documented more clearly.

机译：在使用固态反应制备的NaCaPO_4基质中，首次报道了在非还原性纯氩气气氛中Eu〜（3+）还原为Eu〜（2+）。光致发光光谱曲线证实了所制备的化合物中存在Eu〜（2+）离子，并且这种减少已通过电荷补偿模型进行了解释。还研究了锂的掺入对NaCaPO_4：Eu〜（2+）荧光粉的光致发光效率的影响，并适当解释了各种掺杂浓度的锂离子。为了研究它们的潜在应用，还讨论了这些磷光体的CIE坐标和与温度有关的发光曲线。除了分析其光致发光特性外，还研究了其他重要特征，如XRD，SEM，TG-DTA，FT1R，拉曼光谱图，这些解释得到了更清晰的记录。

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《Journal of Alloys and Compounds: An Interdisciplinary Journal of Materials Science and Solid-state Chemistry and Physics》 |2011年第30期|共6页
作者
Bhaskar Kumar Grandhe; Vengala Rao Bandi; Kiwan Jang;
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正文语种 eng
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Phosphate phosphors; Europium; Reduction; Non-reducing atmosphere;

机译：磷光体;还原非还原性气氛;

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1. Reduction of Eu~(3+) to Eu~(2+) in NaCaPO_4:Eu phosphors prepared in a non-reducing atmosphere [J] . Bhaskar Kumar Grandhe, Vengala Rao Bandi, Kiwan Jang Journal of Alloys and Compounds: An Interdisciplinary Journal of Materials Science and Solid-state Chemistry and Physics . 2011,第30期

机译：在非还原气氛中制备的NaCaPO_4：Eu荧光粉中Eu〜（3+）还原为Eu〜（2+）
2. The reduction of Eu~(3+) to Eu~(2+) in BaMgSiO_4:Eu prepared in air and the luminescence of BaMgSiO_4:Eu~(2+) phosphor [J] . Mingying Peng, Zhiwu Pei, Guangyan Hong, Journal of Materials Chemistry: An Interdisciplinary Journal dealing with Synthesis, Structures, Properties and Applications of Materials, Particulary Those Associated with Advanced Technology . 2003,第5期

机译：空气中制备的BaMgSiO_4：Eu中Eu〜（3+）还原为Eu〜（2+）和BaMgSiO_4：Eu〜（2+）荧光粉的发光
3. Abnormal Reduction, Eu~(3+)→ Eu~(2+), and Defect Centers in Eu~(3+)-Doped Pollucite, CsAlSi_2O_6, Prepared in an Oxidizing Atmosphere [J] . Hongde Xie, Juan Lu, Ying Guan, Inorganic Chemistry: A Research Journal that Includes Bioinorganic, Catalytic, Organometallic, Solid-State, and Synthetic Chemistry and Reaction Dynamics . 2014,第2期

机译：在氧化气氛中制备的掺杂Eu〜（3+）的硅钙石CsAlSi_2O_6的异常还原，Eu〜（3+）→Eu〜（2+）和缺陷中心
4. Recovery of red (Y{sub}2O{sub}3:Eu{sup}(3+)), Blue (Sr,Ca,Ba){sub}10(PO{sub}4){sub}6 Cl{sub}2:Eu{sup}(2+) and green (LaPO{sub}4:Tb{sup}(3+),Ce{sup}(3+)) rare earth phosphors from waste phosphor sludge by liquid/liquid extraction [C] . Mei Guangjun, Xie Kefeng International Conference on Bioinformatics and Biomedical Engineering . 2008

机译：恢复红色（y {sub} 2o {sub} 3：eu {sup}（3+）），蓝色（sr，ca，ba）{sub} 10（po {sub} 4）{sub} 6 cl {sub 2：欧盟{sup}（2+）和绿色（Lapo {sub} 4：tb {sup}（3 +），ce {sup}（3+））通过液/液萃取来自废磷光体污泥的稀土磷光体
5. Energy transfer and waveguide studies of europium(3+) and terbium(3+)-doped 2 silicon dioxide-titanium dioxide glass prepared via the sol-gel route. [D] . Mancuso, Carmela. 2002

机译：通过溶胶-凝胶法制备的掺（（3+）和ter（3+）的2二氧化硅-二氧化钛玻璃的能量传输和波导研究。
6. Control of Eu Oxidation State in Y2O3−xSx:Eu Thin-Film Phosphors Prepared by Atomic Layer Deposition: A Structural and Photoluminescence Study [O] . José Rosa, Jonas Deuermeier, Pekka J. Soininen, 2020

机译：通过原子层沉积制备的Y2O3-xSx：Eu薄膜荧光粉中Eu氧化态的控制：结构和光致发光研究
7. Li_2SrSiO_4:Eu~(2+),Tb~(3+)中Eu~(2+)和Tb~(3+)的发光特性和能量传递 [O] . 徐丽丽, 陈毅彬, 曾人杰 2011

机译：Li_2SrSiO_4:Eu~(2+),Tb~(3+)中Eu~(2+)和Tb~(3+)的发光特性和能量传递
8. Double-Layer Effects on Simple Electrode Reactions. III. The Reduction of Eu(3+) and Cr(3+) in the Presence of Thiocyanate Anions. Evidence for Ligand Bridging. [R] . Weaver, M. J., Anson, F. C. 1975

机译：简单电极反应的双层效应。 III。硫氰酸根阴离子存在下Eu（3+）和Cr（3+）的还原。配体桥接的证据。

Reduction of Eu~(3+) to Eu~(2+) in NaCaPO_4:Eu phosphors prepared in a non-reducing atmosphere

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