Abstract In the present investigation the wet chemical combustion method is used for the first time to prepare La10Si6O27 phosphors by incorporating Dy3+(1-11 mol %) cations (LNPs). The powder X-ray diffraction patterns of LNPs display the oxyapatite hexagonal phase. The estimated crystallite size, using Scherer's method, is between 20-30 nm and the same was confirmed via Transmission Electron Microscopy (TEM). The bandgap energy (Eg) values calculated from diffuse reflection data were in the range of 5.6-5.72 eV. The emission spectrum is composed of characteristic transitions of Dy3+ cations (intra 4f), namely 4F9/2 → 6H15/2 (blue-479 nm), 4F9/2 → 6H13/2 (yellow-578 nm) and 4F9/2 → 6H11/2 (red-670 nm) under near-UV excitation energies. The emission results confirm the choice of using LNPs in applications of white light emitting diodes and the same was found in Color chromaticity coordinates. The white emission intensity was attributed to inherent defects, in particular oxygen vacancies which could contribute to the transfer of energy from the host to dopant ions. The results from CV (current-voltage) and EIS (electrochemical impedance spectra) show the strong electrochemical properties of LNPs. The solution of paracetamol and sildenafil (Penagra) was effectively sensed using modified carbon paste electrodes. LNPs showed a good photocatalytic activity (PCA) for Orange Red (OR) dye under UV light irradiation. All the above results indicate that the synthesized LNPs area good candidate for displays, waste water treatment and for the use as electrochemical sensors.

中文翻译：

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燃烧合成的 La10Si6O27:Dy3+ 纳米磷光体的增强光致发光、电化学和光催化活性

摘要 本研究首次采用湿法化学燃烧法通过掺入 Dy3+(1-11 mol %) 阳离子 (LNPs) 制备 La10Si6O27 荧光粉。LNP 的粉末 X 射线衍射图显示氧磷灰石六方相。使用 Scherer 方法估计的微晶尺寸在 20-30 nm 之间，并且通过透射电子显微镜 (TEM) 证实了这一点。根据漫反射数据计算的带隙能量 (Eg) 值在 5.6-5.72 eV 的范围内。发射光谱由 Dy3+ 阳离子（4f 内）的特征跃迁组成，即 4F9/2 → 6H15/2（蓝色-479 nm）、4F9/2 → 6H13/2（黄色-578 nm）和 4F9/2 → 6H11 /2 (red-670 nm) 在近紫外激发能量下。发射结果证实了在白光发光二极管应用中使用 LNP 的选择，并且在颜色色度坐标中也发现了同样的情况。白色发射强度归因于固有缺陷，特别是可能有助于能量从主体转移到掺杂剂离子的氧空位。CV（电流-电压）和 EIS（电化学阻抗谱）的结果表明 LNP 具有很强的电化学性能。扑热息痛和西地那非 (Penagra) 的溶液使用改性碳糊电极有效地检测。LNPs 在紫外光照射下对橙红 (OR) 染料显示出良好的光催化活性 (PCA)。所有上述结果表明合成的 LNP 是显示、废水处理和用作电化学传感器的良好候选者。