Microemulsion synthesis and optical temperature sensor properties in HA/β-TCP composite phosphors

IF 4.6 3区化学 Q2 CHEMISTRY, MULTIDISCIPLINARY

RSC Advances Pub Date : 2025-06-25 DOI:10.1039/D5RA02458G

Cao Xuan Thang, Duy-Hung Nguyen, Vuong-Hung Pham, Nguyen Viet Tung, Do Danh Bich and Hoang Nhu Van

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Abstract

Herein, a novel microemulsion (ME) method for the synthesis of rare earth-element-doped hydroxyapatite (HA)/beta-tricalcium phosphate (β-TCP) composite phosphors was performed and yielded phosphors with intense green upconversion (UC) emission and high temperature sensitivity. The effect of polyvinyl alcohol (PVA) content on the structure and luminescence properties of the phosphors was investigated in detail. X-ray diffraction and Raman spectra showed that the mixed phases included the main hexagonal HA phase and the secondary orthorhombic β-TCP phase. Under 975 nm excitation, the obtained phosphors exhibited strong green UC emission, and their intensity depended on PVA content. Notably, the fluorescence intensity ratio technique revealed that the phosphors had a high color purity of up to 94.77% and high temperature sensitivity of 0.93% K⁻¹ at 293 K. These results indicate that the phosphors are suitable for applications in thermal sensors and optoelectronic devices.

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HA/β-TCP复合荧光粉的微乳液合成及光学温度传感器性能

本文采用微乳法制备了稀土元素掺杂羟基磷灰石(HA)/ β-磷酸三钙（β-TCP）复合荧光粉，得到了具有强绿色上转换（UC）发射和高温敏感性的荧光粉。研究了聚乙烯醇（PVA）含量对荧光粉结构和发光性能的影响。x射线衍射和拉曼光谱表明，混合相包括主六方HA相和次正交β-TCP相。在975 nm激发下，所制得的荧光粉具有较强的绿色UC发光，发光强度与PVA含量有关。值得注意的是，荧光强度比技术表明，荧光粉具有高达94.77%的高色纯度和0.93%的高温灵敏度K−1在293 K。这些结果表明，该荧光粉适合应用于热传感器和光电子器件。

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来源期刊

RSC Advances chemical sciences-

CiteScore

7.50

自引率

2.60%

发文量

3116

审稿时长

1.6 months

期刊介绍： An international, peer-reviewed journal covering all of the chemical sciences, including multidisciplinary and emerging areas. RSC Advances is a gold open access journal allowing researchers free access to research articles, and offering an affordable open access publishing option for authors around the world.