超支化聚乙烯亚胺改性荧光碳点材料的制备和表征

摘要以超支化聚乙烯亚胺（PEI）和柠檬酸（CA）为原料，采用水热合成法制备了荧光碳点，通过PEI表面改性的方法，大大提高了碳点的荧光量子产率。考察了制备过程中的原料用量、反应时间、反应温度等条件对荧光碳点荧光强度的影响，优化了荧光碳点的制备过程，在最适宜实验条件下得到了荧光量子产率为43%荧光碳点。此外，还考察了溶液pH值、离子强度、紫外曝光等因素对碳点荧光稳定性的影响，采用紫外可见光谱法、荧光光谱法和透射电镜对荧光碳点进行了表征。

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	路晨
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关键词：荧光碳点水热合成法聚乙烯亚胺柠檬酸

Abstract： Hyperbranched polyethyleneimine (PEI) and citric acid (CA) were used to prepare fluorescent carbon dots by a hydrothermal synthesis method. It was experimentally demonstrated that the fluorescent intensity of carbon dots was greatly improved by PEI surface modification. The effects of dosage, temperature and reaction time on the fluorescence of carbon dots were investigated. Under the optimal experimental conditions, the fluorescent quantum yield of 43% was achieved. In addition, the fluorescent carbon dots were characterized by UV-vis spectroscopy, fluorescent spectroscopy and transmission electron microscopy.

Keywords： fluorescent carbon dots； hydrothermal synthesis method； polyethyleneimine； citric acid

Received 2018-03-19;

Corresponding Authors: 余丽萍,E-mail:lipingyu@tju.edu.cn。 Email: lipingyu@tju.edu.cn

About author: 路晨(1992-),女,硕士研究生,主要研究方向为荧光碳点的制备与检测应用。

引用本文:

路晨, 余莉萍.超支化聚乙烯亚胺改性荧光碳点材料的制备和表征[J]. 化学工业与工程, 2019,36(3): 16-21

Lu Chen, Yu Liping.Preparation and Characterization of Fluorescent Carbon Dots Modified by Hyperbranched Polyethyleneimine[J]. Chemcial Industry and Engineering, 2019,36(3): 16-21

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