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首页> 外文期刊>Journal of Ceramic Processing Research. (Text in English) >Synthesis of Gd2O2S : Eu3+ hollow sphere by a hydrothermal method assisting with reduction route
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Synthesis of Gd2O2S : Eu3+ hollow sphere by a hydrothermal method assisting with reduction route

机译：还原途径辅助水热法合成Gd2O2S：Eu3 +空心球

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摘要

Gd2O2S : Eu3+ hollow spheres were successfully synthesized through a hydrothermal method assisting with reduction route from commercially available Gd2O3, Eu2O3, HNO3, (NH4)(2)SO4 and CO(NH2)(2) (urea) as the starting materials. The assynthesized products were characterized by X-ray diffraction (XRD), Fourier transform infrared spectroscopy (FT-IR), scanning electron microscopy (SEM), field emission scanning electron microscopy (FE-SEM) and photoluminescence (PL) spectra. The XRD and FT-IR results demonstrate that the precursor has highly crystalline in nature and could be converted into pure Gd2O2S phase at 800 degrees C for 2 hrs in the hybrid atmosphere of flowing argon and hydrogen (90% Ar + 10% H-2). SEM and FE-SEM observations show that the obtained Gd2O2S particles possess hollow sphere structure, which has a typical size of about 10 mu m in diameter and about 1 mu m in shell thickness. PL spectroscopy reveals that the strongest red emission peak is located at 628 nm under 277 nm and 330 nm UV light excitation for the Gd2O2S : Eu3+ (5% mol) hollow spheres, which corresponds to the D-5(0) -> F-7(2) transition of Eu3+ ions. Decay study demonstrates that the D-5(0) -> F-7(2) transition of Eu3+ ions has a single exponential decay behavior. The fitting result shows the lifetime for the D-5(0) -> F-7(2) transition under 277 nm and 330 nm UV light excitation is 0.5692 ms and 0.5435 nm, respectively.
机译：Gd2O2S：Eu3 +中空球体是通过水热法并以还原途径为辅助，以市售Gd2O3，Eu2O3，HNO3，（NH4）（2）SO4和CO（NH2）（2）（脲）为起始原料成功合成的。所合成的产物通过X射线衍射（XRD），傅里叶变换红外光谱（FT-IR），扫描电子显微镜（SEM），场发射扫描电子显微镜（FE-SEM）和光致发光（PL）光谱进行表征。 XRD和FT-IR结果表明，该前驱物具有高度结晶性，可以在流动的氩气和氢气（90％Ar + 10％H-2）的混合气氛中在800摄氏度下转化为纯Gd2O2S相2小时。 ）。 SEM和FE-SEM观察表明，所获得的Gd 2 O 2 S颗粒具有空心球状结构，其典型尺寸为直径约10μm，壳厚度约1μm。 PL光谱显示，对于Gd2O2S：Eu3 +（5％mol）空心球，最强的红色发射峰位于277 nm和330 nm的紫外光激发下的628 nm，它对应于D-5（0）-> F- Eu3 +离子的7（2）跃迁。衰变研究表明Eu3 +离子的D-5（0）-> F-7（2）跃迁具有单个指数衰减行为。拟合结果显示D-5（0）-> F-7（2）跃迁在277 nm和330 nm下的寿命分别为0.5692 ms和0.5435 nm。

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