Preparation and Optical Characterization of SiO2 Particles Coated with Nanosized Zn2SiO4 ∶ Mn

WANG Lei-yan; XU Guang-qing; ZHENG Zhi-xiang

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Preparation and Optical Characterization of SiO₂ Particles Coated with Nanosized Zn₂SiO₄ ∶ Mn

paper | 更新时间：2020-08-12

- Preparation and Optical Characterization of SiO₂ Particles Coated with Nanosized Zn₂SiO₄ ∶ Mn
- Chinese Journal of Luminescence Vol. 31, Issue 4, Pages: 543-548(2010)
- 作者机构：
  
  合肥工业大学材料科学与工程学院, 安徽合肥 230009
- 作者简介：
- 基金信息：
- DOI：
  CLC： TB34
- Received：17 August 2009，
  
  Revised：11 November 2009，
  
  Published Online：27 August 2010，
  
  Published：27 August 2010
- 稿件说明：
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王雷燕, 徐光青, 郑治祥. 纳米Zn2SiO4 ∶ Mn包覆SiO2 颗粒的制备及表征[J]. 发光学报, 2010,31(4): 543-548

WANG Lei-yan, XU Guang-qing, ZHENG Zhi-xiang. Preparation and Optical Characterization of SiO2 Particles Coated with Nanosized Zn2SiO4 ∶ Mn[J]. 发光学报, 2010,31(4): 543-548
王雷燕, 徐光青, 郑治祥. 纳米Zn2SiO4 ∶ Mn包覆SiO2 颗粒的制备及表征[J]. 发光学报, 2010,31(4): 543-548 DOI：

WANG Lei-yan, XU Guang-qing, ZHENG Zhi-xiang. Preparation and Optical Characterization of SiO2 Particles Coated with Nanosized Zn2SiO4 ∶ Mn[J]. 发光学报, 2010,31(4): 543-548 DOI：

摘要

采用水热合成方法添加KOH在SiO

颗粒表面包覆Mn

掺杂纳米Zn

SiO

通过X射线衍射(XRD)仪、扫描电子显微镜(SEM)、能谱、光致发光(PL)光谱仪对产物的晶体结构、形貌及光学性能进行表征

并对Zn

SiO

晶体在水热反应过程中的反应机制进行了讨论。XRD测试结果表明:220 ℃水热条件下

添加少量KOH

反应不同时间后

可在石英砂表面生成一层Zn

SiO

;SEM照片显示所生成的Zn

SiO

为六棱柱形

并且不同反应条件下Zn

SiO

的包覆程度不同。反应产物经光致发光性能研究表明:Mn

掺杂纳米Zn

SiO

包覆SiO

样品中显示两套光致发光谱

一套为250 nm左右激发产生的522 nm绿色发光带

另一套为340~410 nm宽带激发的440 nm蓝色发光带

前者为典型的Mn

离子发光

后者440 nm发光带则有可能来源于基体SiO

的氧空位缺陷。

Abstract

doped nanometer Zn

SiO

was synthesized through adding KOH and was coated on the surface of SiO

by a hydrothermal method. The crystal structure

shape and optical properties of the products were analyzed with X-ray diffraction (XRD)

scanning electron microscopy (SEM)

energy spectrum and photoluminescence (PL). Also

the reaction of Zn

SiO

crystals during the hydrothermal process was discussed based on these data. The XRD patterns showed that Zn

SiO

was obtained on the surface of SiO

particles at the reaction temperature of 220 ℃ for different reaction time. SEM results showed that the shape of Zn

SiO

is hexagonal prism. The amount of Zn

SiO

coated on the SiO

is decided on reactive conditions. The photoluminescence measurements indicated there are two photoluminescence spectra. One is green emission with peak wavelength at 522 nm

which excited at 250 nm. The other is blue emission with peak wavelength at 442 nm with a wide excitation band in the ragne of 340 to 410 nm. The former is obviously resulted from Mn

ions in the crystal

and the latter is originated from the oxygen vacancies in SiO

particles.

关键词

Keywords

references

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