Bessadok M N, Bouri A, Ananias D, Mrabet S, Vázquez-Vázquez C, El Mir L
Laboratory of Physics of Materials and Nanomaterials Applied at Environment (LaPhyMNE-LR05ES14), Faculty of Sciences in Gabes, Gabes University 6072 Gabes Tunisia
Department of Chemistry, CICECO - Aveiro Institute of Materials, University of Aveiro 3810-193 Aveiro Portugal.
RSC Adv. 2024 Dec 17;14(53):39598-39608. doi: 10.1039/d4ra07535h. eCollection 2024 Dec 10.
In the present study, a SiO/ZnSiO:Eu glass-ceramic composite was synthesized by a homemade modified sol-gel method. Structural, morphological, and optical properties were investigated. Structural and morphological analysis proves the existence of silica and zinc silicate phases with the latter surrounded and shielded by the silica matrix. Optical-vibrational analysis shows the fingerprint peaks of a ZnSiO material, confirming the good establishment of the phase. Photoluminescence plots reveal the presence of strong Eu ion emission lines that come from radiative recombination from D to F ( = 0-4) inner states. The curves prove, as well, the appearance of weak wide blue (450 nm) and green (530 nm) bands related, respectively, to oxygen deficiency and zinc vacancy emission centers related to silica/zinc silicate intrinsic defects. The latter are taken as a starting point to investigate the thermometry properties of the sample by combining them with the europium principal emission lines (F) to get a maximum relative sensitivity of 2.36% K at the [12-140 K] temperature range. The findings are promising and show, for the first time, the thermometry study of Eu-doped zinc silicate at below room temperature range.
在本研究中，采用自制的改进溶胶-凝胶法合成了SiO/ZnSiO:Eu玻璃陶瓷复合材料。对其结构、形态和光学性能进行了研究。结构和形态分析证明了二氧化硅和硅酸锌相的存在，后者被二氧化硅基质包围并屏蔽。光学振动分析显示了ZnSiO材料的指纹峰，证实了该相的良好形成。光致发光图谱揭示了来自D到F（J = 0-4）内态辐射复合的强Eu离子发射线的存在。这些曲线还证明了分别与氧缺陷和与二氧化硅/硅酸锌固有缺陷相关的锌空位发射中心有关的弱宽带蓝光（450 nm）和绿光（530 nm）带的出现。后者被作为一个起点，通过将它们与铕的主要发射线（F）相结合来研究样品的测温特性，在[12-140 K]温度范围内获得了2.36% K的最大相对灵敏度。这些发现很有前景，并且首次展示了在室温以下范围内对Eu掺杂硅酸锌的测温研究。
