高等学校化学学报

高等学校化学学报

• 研究论文 • 上一篇    

菠菜基水溶红色荧光碳点的微波合成及Pb2+荧光检测

江霆杰1,曹珏然1,姚胜峰2,宋健3,李娜1,陈永颖1,李唯1,张浩然1,雷炳富1   

  1. 1. 华南农业大学材料与能源学院
    2. 浙江百奥迈斯生物科技股份有限公司
    3. 广东大海生物科技有限公司
  • 收稿日期:2025-03-24 修回日期:2025-04-09 网络首发:2025-04-16 发布日期:2025-04-16
  • 通讯作者: 雷炳富 E-mail:tleibf@scau.edu.cn
  • 基金资助:

    国家自然科学基金（批准号：12274144, 22361132525），广东省自然科学基金项目（批准号：2022A1515010229, 2022A1515012448）资助

Microwave-assisted synthesis of water-soluble red-emitting carbon dots derived from spinach powder and its Pb2+ fluorescence detection application

JIANG Tingjie1, CAO Jueran1, YAO Shengfeng2, SONG Jian3, LI Na1, CHEN Yongying1, LI Wei1, ZHANG Haoran1, LEI Bingfu1   

  1. 1. College of Materials and Energy, South China Agricultural University

    2. Zhe Jiang Biomass Solution Co., Ltd. 3. Guangdong Dahai Biotechnology Co., Ltd.

  • Received:2025-03-24 Revised:2025-04-09 Online First:2025-04-16 Published:2025-04-16
  • Contact: Bingfu LEI E-mail:tleibf@scau.edu.cn
  • Supported by:
    Supported by the National Natural Science Foundation of China(Nos.12274144, 22361132525) and the Natural Science Foundation of Guangdong Province, China(Nos. 2022A1515010229, 2022A1515012448)

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摘要： 本文以菠菜粉为碳源，通过微波法一步制备了水溶性红光碳点(R-CDs)，并系统研究了其光学性能、结构特征及荧光调控机理。表征结果表明，R-CDs具有均匀的粒径分布(3.62 nm)、长波长红光发射(648 nm)及窄半峰宽(30 nm)，其荧光红移源于羟基与石墨氮的协同作用。基于R-CDs构建的荧光探针可实现Pb2?的高选择性检测，线性范围为0-40 nM，检测限为42 nM(R2=0.99)。研究表明，Pb2?与R-CDs之间的相互作用主要由动态猝灭机制主导。本研究为绿色合成红光碳点及其在重金属检测中的应用提供了新策略。

关键词: 碳点, 红色荧光, 铅离子, 荧光探针

Abstract: In this study, water-soluble red carbon dots (R-CDs) were successfully synthesized via a microwave-assisted method using spinach powder as the carbon precursor. The optical properties, structural characteristics, and fluorescence regulation mechanisms of R-CDs were systematically investigated. The results demonstrated that R-CDs exhibit uniform particle size distribution (3.62 nm), long-wavelength red light emission (648 nm), and a narrow FWHM (30 nm). The observed fluorescence redshift is attributed to the synergistic interaction between hydroxyl groups and graphitic-nitrogen. A fluorescent probe based on R-CDs was developed for highly selective detection of Pb2? ions, with a linear response range of 0–40 nM and a detection limit of 42 nM (R2 = 0.99). Further studies revealed that the interaction between Pb2? and R-CDs is primarily governed by a dynamic quenching mechanism. This work provides a novel and environmentally friendly approach for the synthesis of red carbon dots and their application in heavy metal ion sensing.

Key words: Carbon dots, Red fluorescence, Lead ion, Fluorescent probe

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