凝胶网络模板法可控制备NaYF4:Yb3+, Er3+稀土上转换纳米颗粒

doi:10.3724/SP.J.1077.2014.13448

无机材料学报 ›› 2014, Vol. 29 ›› Issue (5): 545-549.DOI: 10.3724/SP.J.1077.2014.13448

凝胶网络模板法可控制备NaYF₄:Yb³⁺, Er³⁺稀土上转换纳米颗粒

裘慕书^{1, 2}, 林敏^{1, 2}, 赵英², 董宇卿², 卢天健², 徐峰^{1, 2}

(西安交通大学 1. 生物医学信息工程教育部重点实验室; 2. 生物仿生工程与生物力学中心, 西安 710049)

收稿日期:2013-09-02 修回日期:2013-10-22 出版日期:2014-05-20 网络出版日期:2014-04-24
作者简介:裘慕书(1990–), 男, 硕士研究生. E-mail: qiumushu@gmail.com
基金资助:
国家重大国际(地区)合作研究项目(11120101002); 教育部科学研究重大项目(313045); 中央高校基本科研业务费专项基金(2012jdhz46)

Synthesis of NaYF₄:Yb³⁺, Er³⁺ Upconversion Nanoparticles Using Hydrogel Networks as a Template

QIU Mu-Shu^{1, 2}, LIN Min^{1, 2}, ZHAO Ying², DONG Yu-Qing², LU Tian-Jian², XU Feng^{1, 2}

(1. The Key Laboratory of Biomedical Information Engineering of Ministry of Education, Xi’an Jiaotong University, Xi’an 710049, China; 2. Bioinspired Engineering and Biomechanics Center, Xi’an Jiaotong University, Xi’an 710049, China)

Received:2013-09-02 Revised:2013-10-22 Published:2014-05-20 Online:2014-04-24
About author:QIU Mu-Shu. E-mail: qiumushu@gmail.com
Supported by:
Major International Joint Research Program of China (11120101002); Key Project of Chinese Ministry of Education (313045); Fundamental Research Funds for the Central Universities (2012jdhz46)

摘要/Abstract

摘要： 采用水凝胶空间网孔结构作为纳米级反应容器可控制备了NaYF₄:Yb³⁺, Er³⁺稀土上转换发光纳米颗粒。通过控制交联剂密度可以改变网络凝胶网孔结构, 用不同网孔结构的凝胶模板可以控制合成纳米颗粒。通过XRD、TEM、PL等方法研究了不同凝胶模板对颗粒的尺寸、发光性能的影响。结果表明, 利用高分子交联后形成的凝胶网络, 可以制得粒径在10 nm左右的NaYF₄:Yb³⁺, Er³⁺纳米颗粒。随着交联剂浓度的升高, 颗粒粒径及荧光强度都有所下降。本研究为稀土上转换发光纳米颗粒的制备提供了工艺简单、绿色环保的新方法。

关键词: 稀土, 上转换, 纳米颗粒, 水凝胶网络结构, 交联度

Abstract: Hydrogel network structures were used as nano-sized reactors for synthesizing NaYF₄:Yb³⁺, Er³⁺ upconversion nanoparticles with controlled size. By adjusting the crosslinking density, hydrogel networks with different sizes were prepared and used as reactor to control the size of synthesized nanoparticles. The particle size and upconversion luminescence property of the nanoparticles were characterized using XRD, TEM and photoluminescence (PL) spectra. The results show that the size of synthesized NaYF₄:Yb³⁺, Er³⁺ nanoparticles is around 10 nm. The diameter and the luminescence intensity decrease with increase of hydrogel crosslinking density. The increased crosslinking density reduces Ostwald ripening and increases pore pressure, which limit the growth of nanoparticles. The decreased particle size results in broken bonds on the particle surface and particle scattering. Besides, the hydrogel may also quench the fluorescence of the nanoparticles. This research provides a simple and environmentally friendly method for synthesizing uniform upconversion nanoparticles.

Key words: rare earth, upconversion, upconversion nanoparticle, hydrogel network, crosslinking density

中图分类号:

TQ133

裘慕书, 林敏, 赵英, 董宇卿, 卢天健, 徐峰. 凝胶网络模板法可控制备NaYF₄:Yb³⁺, Er³⁺稀土上转换纳米颗粒[J]. 无机材料学报, 2014, 29(5): 545-549.

QIU Mu-Shu, LIN Min, ZHAO Ying, DONG Yu-Qing, LU Tian-Jian, XU Feng. Synthesis of NaYF₄:Yb³⁺, Er³⁺ Upconversion Nanoparticles Using Hydrogel Networks as a Template[J]. Journal of Inorganic Materials, 2014, 29(5): 545-549.

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凝胶网络模板法可控制备NaYF₄:Yb³⁺, Er³⁺稀土上转换纳米颗粒

Synthesis of NaYF₄:Yb³⁺, Er³⁺ Upconversion Nanoparticles Using Hydrogel Networks as a Template

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