YVO4:Eu3+@SiO2核壳结构纳米复合材料的合成与表征

刘利娜; 张东梅; 张永胜; 臧春和; 唐春娟

doi:10.3788/fgxb20153608.0882

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YVO₄:Eu³⁺@SiO₂核壳结构纳米复合材料的合成与表征

材料合成及性能 | 更新时间：2020-08-12

- YVO₄:Eu³⁺@SiO₂核壳结构纳米复合材料的合成与表征
- Synthesis and Characterization of Core-shell Structured YVO₄ :Eu³⁺@SiO₂ Nanocomposites
- 发光学报 2015年36卷第8期页码：882-887
- 作者机构：
  
  洛阳理工学院数理部,河南洛阳,471023
- 作者简介：
- 基金信息：
  
  国家自然科学基金(51302128,11104359)();河南省教育厅科学技术研究重点项目(14A140018)资助()
- DOI：10.3788/fgxb20153608.0882
  中图分类号： O482.31
- 纸质出版日期：2015-8-3，
  
  收稿日期：2015-3-11，
  
  修回日期：2015-6-30，
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刘利娜, 张东梅, 张永胜等. YVO4:Eu3+@SiO2核壳结构纳米复合材料的合成与表征[J]. 发光学报, 2015,36(8): 882-887

LIU Li-na, ZHANG Dong-mei, ZHANG Yong-sheng etc. Synthesis and Characterization of Core-shell Structured YVO4 :Eu3+@SiO2 Nanocomposites[J]. Chinese Journal of Luminescence, 2015,36(8): 882-887
刘利娜, 张东梅, 张永胜等. YVO4:Eu3+@SiO2核壳结构纳米复合材料的合成与表征[J]. 发光学报, 2015,36(8): 882-887 DOI： 10.3788/fgxb20153608.0882.

LIU Li-na, ZHANG Dong-mei, ZHANG Yong-sheng etc. Synthesis and Characterization of Core-shell Structured YVO4 :Eu3+@SiO2 Nanocomposites[J]. Chinese Journal of Luminescence, 2015,36(8): 882-887 DOI： 10.3788/fgxb20153608.0882.

摘要

用沉淀法制备了尺寸约为8 nm的YVO

:Eu

纳米粒子

然后用反相微乳液法在YVO

:Eu

纳米粒子的表面包覆了一层SiO

壳. 利用XRD、TEM、UV-Vis吸收光谱和光致发光光谱对合成的样品进行了表征.得到的复合物具有较好的核壳结构

通过改变硅酸四乙酯的用量可以改变SiO

壳的厚度.研究了SiO

壳对YVO

:Eu

发光性质的影响

结果表明:包覆和未包覆的样品在紫外光激发下都有Eu

的特征发射;随着SiO

壳厚度的增加

发光强度和量子效率越来越低

格位对称性越来越高.

Abstract

YVO

:Eu

nanoparticles of about 8 nm were synthesized by precipitation reactions and coated with SiO

by a reverse microemulsion method. Powder X-ray diffraction (XRD) patterns indicate that these nanoparticles are purely tetragonal phase. Transmission electron microscope (TEM) images show that YVO

:Eu

nanoparticles are successfully coated with silica to form core-shell structured nanocomposites. The thicknesses of SiO

shells can be altered by changing the volume of tetraethoxysilane (TEOS) used in the reaction. The ultraviolet-visible (UV-Vis) absorption spectra of YVO

:Eu

@SiO

nanocomposites agree well with that of the YVO

:Eu

nanoparticles colloid. Both the excitation and emission spectra are the same for YVO

:Eu

nanoparticles and the nanocomposites. With the increasing of the thickness of SiO

shell

the intensity ratio of

decreases

indicating that SiO

shells can increase the local symmetry of Eu

. All samples can emit bright red light under ultraviolet irradiation. The photoluminescence quantum yield decreases after SiO

coating. With the increasing of the thickness of SiO

shell

the photoluminescence quantum yield becomes lower and lower.

关键词

YVO4 :Eu3+SiO2微乳液核壳发光

Keywords

YVO4:Eu3+SiO2microemulsioncore-shellluminescence

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