Production, characterization, and photocatalytic properties of Eu:Y2O3 nanopowders,Journal of the Chinese Chemical Society

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Production, characterization, and photocatalytic properties of Eu:Y2O3 nanopowders
Journal of the Chinese Chemical Society ( IF 1.6 ) Pub Date : 2022-09-16 , DOI: 10.1002/jccs.202200268
Fatma Unal ₁ , Emre Alp ₂ , Kursat Kazmanli ₃

Affiliation

Eu:Y₂O₃ nanophosphors (NPs) with different Eu concentrations (3, 5, and 7 at%) were successfully synthesized via the sol–gel method. All synthesized powders had a cubic bixbyite-type crystal structure with space group Ia-3. It was observed they had agglomerated sphere-like morphologies. In addition, a neck formation between the particles, which was the result of the sintering effect at the increasing calcination temperature, was also observed by scanning electron microscopy analysis. Raman and X-ray photoelectron spectroscopy (XPS) analyses confirmed that the Eu dopant entered into the Y₂O₃ host. The XPS peak positions shifted to relatively higher binding energy values with increasing dopant concentration and calcination temperature. Increasing Eu dopant concentration in the host structure also increased the 3+ valence ions. The band gap values of the NPs varied between 4.30 and 4.54 eV. The powders doped with 5 at% Eu was active as photocatalysts and the powders that were synthesized at 800°C exhibited highly photocatalytic activity.

中文翻译：

Eu:Y2O3 纳米粉体的制备、表征和光催化性能

通过溶胶-凝胶法成功合成了具有不同 Eu 浓度（3、5 和 7 at%）的Eu:Y ₂ O _{3纳米荧光粉 (NPs)。}所有合成的粉末都具有立方方铁锰矿型晶体结构，空间群为 Ia-3。据观察，它们具有聚集的球状形态。此外，通过扫描电子显微镜分析还观察到颗粒之间的颈部形成，这是在增加的煅烧温度下烧结效应的结果。拉曼和 X 射线光电子能谱 (XPS) 分析证实 Eu 掺杂剂进入了 Y ₂ O ₃主持人。随着掺杂剂浓度和煅烧温度的增加，XPS 峰位置向相对较高的结合能值移动。增加主体结构中的 Eu 掺杂剂浓度也增加了 3+ 价离子。NPs 的带隙值在 4.30 和 4.54 eV 之间变化。掺杂 5 at% Eu 的粉末具有光催化剂活性，在 800°C 合成的粉末表现出高光催化活性。

更新日期：2022-09-16

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