Page 87 - 《精细化工》2021年第11期

第 38 卷第 11 期 精 细 化 工 Vol.38, No.11
2021 年 11 月 FINE CHEMICALS Nov. 2021

功能材料
蓝色荧光碳点的制备及检测、防伪应用

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魏建斐 1,2 ，马国聪 ，刘蕴钰 ，刘小婷 ，崔童然 ，王 锐 1,2*
（1. 北京服装学院 材料设计与工程学院，北京 100029；2. 北京服装学院 服装材料研究开发与评价北
京市重点实验室，北京市纺织纳米纤维工程技术研究中心，北京 100029）

摘要：以柠檬酸钠为碳源、氨水为氮源，采用一步水热法制备了氮掺杂碳点（NCDs），对其制备条件进行了优
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化。采用荧光光谱仪、TEM、AFM、XPS 及 FTIR 对制备的 NCDs 进行了表征，并探索了 NCDs 在 Fe 检测及
荧光防伪中的应用。结果表明，NCDs 的最优制备条件为柠檬酸钠浓度为 0.1 mol/L、氨水浓度为 1.8 mol/L、
反应温度为 200 ℃、反应时间 6 h、装载体积 25 mL。在最优条件下制备的 NCDs 的荧光为典型的非激发波长依
赖型，最佳激发波长为 343 nm，最佳发射波长为 443 nm，荧光量子产率可达 54.9%。NCDs 为球形结构，平均
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粒径为 4.96 nm，碳核为类石墨烯结构且其表面含有—NH 2 、—OH 及—COOH。NCDs 的荧光可被 Fe 选择性猝
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灭，且荧光猝灭程度与 Fe 浓度在 0.1~87.5 μmol/L 范围内线性关系良好，检测限为 50 nmol/L。此外，将 NCDs
配制成荧光墨水，利用喷墨打印机打印出的图案整体饱满、边缘细节清晰具有很强的可识别性。
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关键词：非激发波长依赖；荧光；碳点；Fe 检测；防伪；功能材料
中图分类号：TB383.1；TQ638 文献标识码：A 文章编号：1003-5214 (2021) 11-2233-07

Preparation of blue fluorescent carbon dots and its application
in detection and anti-counterfeiting

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WEI Jianfei , MA Guocong , LIU Yunyu , LIU Xiaoting , CUI Tongran , WANG Rui 1,2*
（1. School of Materials Design & Engineering, Beijing Institute of Fashion Technology, Beijing 100029, China; 2. Beijing
Key Laboratory of Clothing Materials Research and Development and Assessment, Beijing Engineering Research Center
of Textile Nano Fiber, Beijing Institute of Fashion Technology, Beijing 100029, China）
Abstract: Nitrogen-doped carbon dots (NCDs) was synthesized by one-step hydrothermal method using
sodium citrate as carbon source and ammonia as nitrogen source. The preparation conditions were optimized.
NCDs prepared were characterized by fluorescence spectrometer, TEM, AFM, XPS and FTIR. The
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application of NCDs in Fe detection and fluorescence anti-counterfeiting was explored. The results showed
that the optimal conditions for the preparation of NCDs were as follows: sodium citrate concentration of 0.1
mol/L, ammonia concentration of 1.8 mol/L, reaction temperature of 200 ℃, reaction time of 6 h, loading
volume of 25 mL. The fluorescence of NCDs prepared under the optimal conditions was typically independent
on the wavelength of excitation light. The best excitation wavelength and emission wavelength of NCDs was
343 and 443 nm, while the fluorescence quantum yield was 54.9%. NCDs were spherical with an average
particle size of 4.96 nm. Carbon core was graphene-like structure and its surface contained —NH 2, —OH
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and —COOH. The fluorescence of NCDs could be selectively quenched by Fe . The linear relationship
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between fluorescence quenching degree and Fe concentration was good in the range of 0.1~87.5 μmol/L,
and the detection limit was 50 nmol/L. In addition, NCDs was prepared into fluorescent ink, and the pattern
printed by the inkjet printer was full as a whole, with clear edge details and strong identification.
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Key words: excitation independence; fluorescence; carbon dots; Fe detection; anti-counterfeiting; functional
materials

收稿日期：2021-06-26; 定用日期：2021-07-28; DOI: 10.13550/j.jxhg.20210663
基金项目：北京市教育委员会科技计划一般项目（KM202110012007）；高水平人才交叉培养-实培计划（NHFZ20210022/023）；2021
年大学生创新创业训练项目（NHFZ20210181/001）
作者简介：魏建斐（1986—），男，讲师，E-mail：weijianfei@bift.edu.cn。联系人：王 锐（1963—），女，教授，E-mail：clywangrui@bift.edu.cn。