带有多种官能团的纳米SiO2胶体的制备及其荧光性能

PDF全文下载：  201803005.pdf

文章编号： 16726987（2018）03003006； DOI： 10.16351/j.16726987.2018.03.005

徐勤海， 孟阿兰*

（青岛科技大学 化学与分子工程学院，山东 青岛 266042）

摘要： 以EDTA、乙二醇、正硅酸四乙酯为原料，采用水热法合成了带有多种官能团的纳米SiO2胶体，采用TEM、XRD、EDS、FTIR、XPS等测试手段对其进行了表征，并研究了其荧光性质。结果表明，所制备的纳米SiO2胶体表面带有Si—O、C—N、CO、C—O、OH等多种官能团，纳米SiO2为无定形颗粒，其粒径约为20 nm，并具有良好的稳定性。多种官能团的存在使纳米SiO2胶体呈现出良好的荧光性能，在365 nm紫外灯光照射下，发射蓝色荧光，当激发波长为370 nm时，其荧光强度最佳，发射波长随激发波长增大产生红移现象。由于其优异的荧光性能，使其可作为荧光探针在生物成像等方面具有巨大的应用潜力。

关键词： 纳米SiO2； 胶体； 荧光； 表面官能团

中图分类号：  O 648.12+4文献标志码： A

引用格式：徐勤海， 孟阿兰. 带有多种官能团的纳米SiO2胶体的制备及其荧光性能\[J\]. 青岛科技大学学报（自然科学版）， 2018， 39（3）： 3035.

XU Qinhai, MENG Alan. Synthesis of nanoSiO2 colloids with multiple functional groups and their fluorescence properties\[J\]. Journal of Qingdao University of Science and Technology（Natural Science Edition), 2018, 39(3)： 3035.

Synthesis of NanoSiO2 Colloids with Multiple Functional

Groups and Their Fluorescence Properties

XU Qinhai, MENG Alan

(College of Chemistry and Molecular Engineering, Qingdao University of Science and Technology, Qingdao 266042, China)

Abstract: In this paper, nanoSiO2 colloids with multiple functional groups were synthesized by hydrothermal method using EDTA, ethylene glycol and tetraethyl orthosilicate as raw materials, the products were characterized by TEM, XRD, EDS, FTIR, XPS, and the fluorescence properties of them were studied. The results showed that the surfaces of asprepared SiO2 colloids had multiple functional groups of Si—O, C—N, C  O, C—O, OH. SiO2 nanoparticles with a diameter of about 20 nm were amorphous structure. The presence of various functional groups made the nanoSiO2 colloids showed good fluorescence properties. The fluorescence intensity was optimal when the excitation wavelength was 370 nm. And the emission wavelength showed redshift with the increase of the excitation wavelength. Based on their excellent fluorescence properties, nanoSiO2 colloids with multiple functional groups as a fluorescent probe might have a huge application potential in biological imaging.

Key words: nanoSiO2; colloid; fluorescence; surface functional groups

收稿日期：    20170313

基金项目： 国家自然科学基金项目（51572137，51672144）.

作者简介： 徐勤海(1990—)，男，硕士研究生.*通信联系人.