Bi_(4-x)Eu_xTi_(3-y)M_yO_(12)(M=Fe,Co,Ni)纳米颗粒的制备及光学和磁学性能

三层结构的Aurivillius相的Bi_(4-x)Eu_xTi_(3-y)M_yO_(12)(x=0~0.6;M=Fe/Co/Ni,y=0.01,0.02,0.04,0.06,0.08,0.10)纳米颗粒,是通过共沉淀法和后续的高温煅烧处理所制备的。利用XRD,SEM,PL,Raman,PPMS等方法对样品进行表征,研究了不同掺杂浓度下的产物的物相、形貌和性能等。实验结果表明,通过掺杂,发现纳米颗粒的粒径变小,形貌更均一,分散性也更好。通过对掺杂离子浓度的优化,发现Eu~(3+)离子的掺杂浓度为x=0.4时,发光强度是最强的。此外,对Ti位进行了磁性离子(Fe~(3+),Co~(3+)和Ni~(2+))的掺杂,实验结果发现随着掺杂的磁性离子浓度的减少,发光强度是逐渐增强,而且产物具有很好的铁磁性。

Synthesis, Luminescent and Magnetic Performance of Bi4-xEuxTi3-yMyO12 (M=Fe/Co/Ni) Nanoparticles

Three-layered Aurivillius phase Bi_4-xEu_xTi_3-yMyO₁₂ (x=0~0.6; M=Fe/Co/Ni, y=0.01, 0.02, 0.04, 0.06, 0.08, 0.10) nanoparticles were synthesized by co-deposition method and high temperature calcination. The as-prepared products were characterized by XRD, SEM, PL, Raman and PPMS, studying the phase, morphology and properties of the samples. The experiments results indicate that the morphology and dispersity of nanoparticles are more uniform, and particle sizes are smaller by doping. By optimizing the doped concentration, the luminescent intensity is strongest when the concentration reached to 0.4. Besides, the results show that the luminescent intensity increases gradually by decreasing the magnetic ions concentration. Moreover, the products have good ferromagnetic properties.