Europium-doped yttrium oxide (Y₂O₃:Eu³⁺) is one of the main red-emitting luminescent materials currently used in light-emitting devices owing to its high luminous efficiency, high color purity, and other excellent optical characteristics. However, Y₂O₃:Eu³⁺ is hydrophilic, which is a major obstacle to its long-term application in high-humidity outdoor environments. Hydrophobic modification is a viable solution to this problem, and can give Y₂O₃:Eu³⁺ many excellent properties and functions, such as self-cleaning ability, anti-static performance, oil/water separation functions, and corrosion resistance. This study reports the preparation of hydrophobic Y₂O₃:Eu³⁺ particles modified with nonfluorinated alkyl silanes. Several influencing factors, including the length of the carbon chain in the silane coupling agent, the pH value of the reaction system, the reaction temperature, and the ratio of reactants, on the hydrophobicity of the prepared samples are studied in detail, and the optimal conditions are determined. A superhydrophobic Y₂O₃:Eu³⁺ material with a water contact angle of 151.6° is finally obtained. Moreover, FTIR, TG, SEM, XPS, XRD, and PL are used to explore the mechanism of the hydrophobic modification and the structural and fluorescence performance changes imparted by this modification.

中文翻译：

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非氟化烷基硅烷对球形 Y2O3:Eu3+ 粉末的疏水改性

掺铕氧化钇(Y ₂ O ₃ :Eu ³⁺ )由于具有高发光效率、高色纯度等优异的光学特性，是目前发光器件中主要使用的红光发光材料之一。然而，Y ₂ O ₃ :Eu ³⁺具有亲水性，这成为其在高湿室外环境中长期应用的一大障碍。疏水改性是解决这一问题的可行方案，可以赋予Y ₂ O ₃ :Eu ³⁺许多优异的性能和功能，如自清洁能力、抗静电性能、油水分离功能、耐腐蚀性能等。本研究报告了用非氟化烷基硅烷改性的疏水性Y ₂ O ₃ :Eu ³⁺颗粒的制备。详细研究了硅烷偶联剂中碳链的长度、反应体系的pH值、反应温度、反应物配比等对所制备样品疏水性的影响因素，并得出了最佳方案。条件确定。最终得到水接触角为151.6°的超疏水Y ₂ O ₃ :Eu ^3+材料。此外，还利用 FTIR、TG、SEM、XPS、XRD 和 PL 来探索疏水改性的机理以及该改性带来的结构和荧光性能变化。