SnO<sub>2</sub>纳米颗粒的制备及其发光性能<sup>*</sup>

doi:10.11901/1005.3093.2013.896

材料研究学报

2014, Vol. 28

Issue (6): 420-426 DOI: 10.11901/1005.3093.2013.896

本期目录 | 过刊浏览

SnO₂纳米颗粒的制备及其发光性能^*

王云,王虹,孙光爱,陈喜平,王仕发(

)

中国工程物理研究院核物理与化学研究所绵阳 621900

Prepared and Photoluminescence of SnO₂ Nanoparticles

Yun WANG,Hong WANG,Guangai SUN,Xiping CHEN,Shifa WANG(

)

Institute of Nuclear Physics and Chemistry, China Academy of Engineering Physics, Mianyang, 621900

引用本文:

王云,王虹,孙光爱,陈喜平,王仕发. SnO₂纳米颗粒的制备及其发光性能^*[J]. 材料研究学报, 2014, 28(6): 420-426.
Yun WANG, Hong WANG, Guangai SUN, Xiping CHEN, Shifa WANG. Prepared and Photoluminescence of SnO₂ Nanoparticles[J]. Chinese Journal of Materials Research, 2014, 28(6): 420-426.

全文: PDF(2930 KB) HTML

摘要:

用大分子网络凝胶法合成了氧化锡(SnO₂)纳米颗粒。X射线衍射(XRD)结果表明, 合成的SnO₂纳米颗粒具有四方金红石结构, 不含任何杂质相。扫描电镜(SEM)观察发现, 制得的SnO₂纳米颗粒形貌规整、呈类菱形。荧光光谱结果表明, 在326 nm波长的光激发下, 其荧光光谱由四个主发射带组成, 其峰值分别位于379, 417, 450, 470 nm。用230 nm波长的光激发, 得到一个740 nm的荧光发射峰。基于实验结果, 探讨了纳米SnO₂的形成机理和发光机制。

关键词 ：无机非金属材料, 大分子网络凝胶法, SnO₂, 纳米颗粒, 发光机制

Abstract：

SnO₂ nanoparticles were synthesized by a polyacrylamide gel technique. X-ray diffraction (XRD) analysis indicates that the as-synthesized SnO₂ nanocrystallites consists merely of a rutile-type SnO₂ with tetragonal crystallographic structure. Scanning electron microscope (SEM) observation shows that the prepared SnO₂ nanoparticles are regularly rhombus in shape. The photo luminescent emission spectrum detected at λ_ex= 326 nm showed four peaks located at 379, 417, 450 and 470 nm, the first having the strongest intensity. The emission spectra also show that an emission band around 740 nm was observed when the excitation wavelength is 230 nm. The forming and luminescence mechanisms of nano-SnO₂ have been discussed based on the experimental results.

Key words： inorganic non-metallic materials polyacrylamide gel technique SnO₂ nanoparticles luminescence mechanisms

收稿日期: 2013-11-25

基金资助:* 国家自然科学基金11105128资助项目。

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图1 SnO2纳米颗粒的制备流程

图2 SnO2纳米颗粒的形成机理

图3 SnO2干凝胶在不同温度下烧结所得产物的XRD谱

表1 SnO2干凝胶烧结在400, 500, 600℃得到的样品的XRD测试结果

图4 SnO2的晶格常数与烧结温度的关系

图5 在600℃烧结得到的SnO2的XRD谱图精修结果, 插图为SnO2的晶体结构图

图6 在400℃烧结所制得的SnO2样品的SEM像

图7 SnO2干凝胶粉末在300 ℃烧结所得产物的红外光谱图

图8 在不同温度烧结的SnO2干凝胶的激发谱(λem = 379 nm)和发射谱

图9 在不同温度下烧结的干凝胶激发谱(λem = 740 nm)和发射谱(λex = 230nm)

图10 在不同温度烧结的干凝胶粉末荧光强度(λem=740 nm)的变化规律

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