高等学校化学学报 ›› 2024, Vol. 45 ›› Issue (2): 20230395.doi: 10.7503/cjcu20230395

• 分析化学 • 上一篇    下一篇

MOFs基微流控电化学芯片对多种重金属离子的实时在线检测

陈晓萍1,2, 王旭潭1, 刘宁1, 汪庆祥1,2, 倪建聪1,2, 杨伟强1,2(), 林振宇3()   

  1. 1.闽南师范大学化学化工与环境学院, 漳州 363000
    2.福建省现代分离分析科学与技术重点实验室, 污染监测与控制福建省高校重点实验室, 漳州 363000
    3.福州大学食品安全与生物分析教育部重点实验室, 福建省食品安全分析与检测技术重点实验室, 福州 350108
  • 收稿日期:2023-09-04 出版日期:2024-02-10 发布日期:2023-11-15
  • 通讯作者: 林振宇 E-mail:yangwq1@163.com;zylin@fzu.edu.cn
  • 作者简介:杨伟强, 男, 博士, 副教授, 主要从事电化学发光传感及介孔材料合成及表界面研究. Email: yangwq1@163.com
  • 基金资助:
    闽南师范大学校长基金(KJ2021005);福建省自然科学基金(2022J05173);国家自然科学基金(22376089)

MOFs-based Microfluidic Chips for Real-time Online Determination of Multiple Heavy Metal Ions

CHEN Xiaoping1,2, WANG Xutan1, LIU Ning1, WANG Qingxiang1,2, NI Jiancong1,2, YANG Weiqiang1,2(), LIN Zhenyu3()   

  1. 1.College of Chemistry,Chemical Engineering and Environment,Minnan Normal University,Zhangzhou 363000,China
    2.Fujian Provincial Key Laboratory of Modern Analytical Science and Separation Technology,Fujian Province University Key Laboratory of Pollution Monitoring and Control,|Minnan Normal University,Zhangzhou 363000,China
    3.Key Laboratory for Analytical Science of Food Safety and Biology,Ministry of Education,Fujian Provincial Key Laboratory of Analysis and Detection for Food Safety,Fuzhou University,Fuzhou 350108,China
  • Received:2023-09-04 Online:2024-02-10 Published:2023-11-15
  • Contact: LIN Zhenyu E-mail:yangwq1@163.com;zylin@fzu.edu.cn
  • Supported by:
    the President’s Fund of Minnan Normal University, China(KJ2021005);the Natural Science Foundation of Fujian Province, China(2022J05173);the National Natural Science Foundation of China(22376089)

摘要:

将具有丰富微孔的ZIF-8金属有机框架和电化学技术对金属离子的富集作用与微流控器件对溶液流动的可控性相结合, 构建了一种新型传感器, 实现了高通量、 实时和快速检测环境中的多种金属离子污染物. 研制的ZIF-8-Nafion/ITO 基微流控电化学传感器对Cd2+, Pb2+及Hg2+离子在0.1~100 μmol/L的浓度范围内具有良好的线性关系, 检出限分别为 0.055, 0.0025及0.0016 μmol/L(S/N=3). 该微流控芯片对于样品的需求量少, 可降低对能源的消耗; 同时由聚二甲基硅氧烷拓印的微流控器件还有望实现柔性电极的功能, 对便携式电化学柔性器件在生物和环境样品的集成化和自动化检测具有重要意义.

关键词: 微流控, 重金属检测, 电化学传感器, 金属有机框架

Abstract:

This study combines the accumulation effects of rich microporous ZIF-8 metal-organic framework(MOF) and the electrochemical technology for the metal ions, and the controllable ability of microfluidic devices for the flowing of solution, to construct a new type of sensor to achieve high-throughput, real-time and rapid detection of multiple metal ion contaminations in the environment. The developed ZIF-8-Nafion/ITO-based microfluidic electrochemical sensors have a good linear relationship for Cd2+, Pb2+ and Hg2+ ions in the concentration range of 0.1—100 μmol/L with the detection limit of 0.055, 0.0025 and 0.0016 μmol/L, respectively(S/N=3). The microfluidic chips require less sample volume which reduces energy consumption; at the same time, the microfluidic devices made up of polydimethylsiloxane are also expected to realize the function of flexible electrodes, which is important for the integrated and automatic detection of biological and environmental samples using portable and flexible electro- chemical devices.

Key words: Microfluidic, Heavy metal detection, Electrochemical sensor, Metal-organic framework(MOF)

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