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采用水热法制备了Eu3+掺杂SrMgB6O11纳米发光材料。利用X射线粉末衍射仪(XRD)、场发射扫描电子显微镜(FESEM)和荧光光谱对SrMgB6O11:Eu3+样品进行表征。结果表明:采用水热法可以成功地合成粒度均匀、结晶完好的SrMgB6O11:Eu3+纳米发光粉。深入研究了反应温度和pH值对SrMgB6O11:Eu3+纳米材料的晶体结构及形貌的影响。结果表明,在120℃时形成了尖锐且强度最强的衍射峰,同时FESEM也表明此时所得材料为纳米棒组成的规则扇形形貌,此后随着温度的升高,XRD图中衍射峰的位置和强度发生变化,说明荧光粉的晶体结构发生变化,FESEM也表明该荧光粉已变为球形颗粒。归属了发射光谱和激发光谱中各激发峰所对应的能级跃迁。荧光光谱也显示:反应温度和pH值影响着Eu3+在晶格中的对称性,且反应温度为120℃及pH值为9时,Eu3+在晶格中的对称性较好。另外,还初步探讨了纳米粒子的生长机制。
Eu3 + doped SrMgB6O11 nano luminescent material was prepared by hydrothermal method. SrMgB6O11: Eu3 + samples were characterized by X-ray powder diffraction (XRD), field emission scanning electron microscopy (FESEM) and fluorescence spectroscopy. The results show that SrMgB6O11: Eu3 + nano-luminescent powder with uniform grain size and good crystal structure can be successfully synthesized by hydrothermal method. The effects of reaction temperature and pH value on the crystal structure and morphology of SrMgB6O11: Eu3 + nanomaterials were investigated. The results show that sharp and strong diffraction peaks are formed at 120 ℃. Meanwhile, FESEM also shows that the material obtained at this time is a regular fan-shaped morphology of nanorods. The diffraction peaks of XRD patterns The position and intensity change, indicating that the crystal structure of the phosphor changes, FESEM also shows that the phosphor has become spherical particles. Attributed to the emission spectrum and excitation spectra of each excitation peak corresponding to the energy level transition. Fluorescence spectroscopy also showed that the reaction temperature and pH value affected the symmetry of Eu3 + in the crystal lattice. The symmetry of Eu3 + in the crystal lattice was better when the reaction temperature was 120 ℃ and pH value was 9. In addition, the growth mechanism of nanoparticles was also discussed.