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壳聚糖基碳量子点的制备、表征及其对过氧化氢的荧光检测研究
引用本文:满华盛,吕霞敏,黄建颖. 壳聚糖基碳量子点的制备、表征及其对过氧化氢的荧光检测研究[J]. 核农学报, 2021, 35(5): 1147-1153. DOI: 10.11869/j.issn.100-8551.2021.05.1147
作者姓名:满华盛  吕霞敏  黄建颖
作者单位:浙江工商大学食品与生物工程学院/浙江省食品安全重点实验室,浙江杭州 310018
基金项目:浙江省自然科学基金(LY20B040001)
摘    要:为制备可用于分析过氧化氢(H2O2)的荧光传感器,本研究利用壳聚糖与DL-酒石酸为反应前体,水热处理制备了新型氮掺碳量子点(CDs),能够高效、简便地检测食品中的H2O2含量;并采用透射电镜(TEM),以及傅里叶变换红外光谱(FTIR)等方法进行分析表征.结果表明,CDs的荧光量子产率约为5.22%,粒径约为20 nm...

关 键 词:壳聚糖  碳量子点  制备  表征  过氧化氢  荧光检测
收稿时间:2020-02-13

Preparation and Characterization of Chitosan-Based Carbon Dots and Its Application in Hydrogen Peroxide Analysis
MAN Huasheng,LYU Xiamin,HUANG Jianying. Preparation and Characterization of Chitosan-Based Carbon Dots and Its Application in Hydrogen Peroxide Analysis[J]. Acta Agriculturae Nucleatae Sinica, 2021, 35(5): 1147-1153. DOI: 10.11869/j.issn.100-8551.2021.05.1147
Authors:MAN Huasheng  LYU Xiamin  HUANG Jianying
Affiliation:School of Food Science and Biotechnology/Food Safety Key Laboratory of Zhejiang Province, Zhejiang Gongshang University, Hangzhou, Zhejiang 310018
Abstract:To prepare a fluorescence sensor for cocoa analysis of H2O2, chitosan and dl-tartaric acid were used as precursors to prepare novel nitrogen doped carbon quantum dots (CDs) by hydrothermal treatment, which could be used to detect the amount of hydrogen peroxide (H2O2) in food efficiently and conveniently. Transmission electron microscopy (TEM) and Fourier transform infrared spectroscopy (FTIR) were used to analyze and characterize.The results showed that the fluorescence quantum yield of the CDs was about 5.22%, and the particle size was about 20 nm, CDs contained a graphene structure with nitrogen atoms, and its surface showed abundant functional groups such as hydroxyl amino and carboxyl groups. In addition, Fe3+ can quench the fluorescence of CDs solution, while Fe2+ had almost no effect on CDs. According to the concentration ratio of CDs and Fe3+ when the fluorescence almost disappeared after mixing, then Fe3+ replaced by Fe2+ at the same concentration, and then H2O2 of different concentrations was added. After the rapid and uniform mixing, the fluorescence emission spectrum under the excitation light at 320 nm was measured and the standard curve was obtained with a linear relationship of H2O2 concentration at 0-60 nm, and the correlation coefficient called R2 was about 0.990 0, with the detection limit about 0.65 nm.
Keywords:chitosan  carbon quantum dots  preparation  characterization  hydrogen peroxide  fluorescence detection  
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