高等学校化学学报 ›› 2022, Vol. 43 ›› Issue (8): 20220161.doi: 10.7503/cjcu20220161

• 分析化学 • 上一篇    下一篇

大尺寸石墨烯量子点组装体的制备及电化学发光性能

王瑞娜1, 孙瑞粉2, 钟添华3, 池毓务2()   

  1. 1.泉州医学高等专科学校药学院, 泉州 362011
    2.福州大学化学学院, 福州 350108
    3.自然资源部第三海洋研究所海洋生物遗传资源重点实验室, 厦门 361005
  • 收稿日期:2022-03-15 出版日期:2022-08-10 发布日期:2022-04-24
  • 通讯作者: 池毓务 E-mail:y.w.chi@fzu.edu.cn
  • 基金资助:
    国家自然科学基金(22074018);泉州市科技计划项目(2019N072S)

Fabrication of a Dispersible Large-sized Graphene Quantum Dot Assemblies from Graphene Oxide and Its Electrogenerated Chemiluminescence Behaviors

WANG Ruina1, SUN Ruifen2, ZHONG Tianhua3, CHI Yuwu2()   

  1. 1.Departmeat of Pharmacy,Quanzhou Medical College,Quanzhou 362011,China
    2.College of Chemistry,Fuzhou University,Fuzhou 350108,China
    3.Key Laboratory of Marine Biogenetic Resources,Third Institute of Oceanography,Ministry of Natural Resources,Xiamen 361005,China
  • Received:2022-03-15 Online:2022-08-10 Published:2022-04-24
  • Contact: CHI Yuwu E-mail:y.w.chi@fzu.edu.cn
  • Supported by:
    the National Natural Science Foundation of China(22074018);Quanzhou City Science & Technology Program, China(2019N072S)

摘要:

对氧化石墨烯纳米材料进行HNO3氧化处理, 制备了水溶性好且具有强电化学发光(ECL)活性的大尺寸石墨烯量子点组装体(Large-sized graphene quantum dot assemblies, LSGQD-NAs). 利用透射电子显微镜(TEM)、 原子力显微镜(AFM)、 傅里叶变换红外光谱(FTIR)和拉曼光谱(Raman)等方法对其进行了表征, 结果表明, 石墨烯量子点组装体的平均高度为20 nm, 且富含大量的羟基和羧基. 电化学测试结果显示, 在共反应物K2S2O8存在下, LSGQD-NAs在阴极产生很强的ECL(峰值约在685 nm); 并推测了其ECL反应机理, 发现LSGQD-NAs容易通过中心未氧化的石墨烯π-π作用于GC电极表面进行组装修饰. 本研究为基于石墨烯量子点ECL传感器的研究提供了新方法.

关键词: 大尺寸石墨烯量子点组装体, 电化学发光, 氧化石墨烯, 石墨烯量子点

Abstract:

A dispersible large-sized graphene quantum dots assemblies(LSGQD-NAs) in aqueous solution with strong electrochemiluminescence activity was fabricated from graphene oxide by nitric acid etching. LSGQD-NAs were characterized by transmission electron microscopy(TEM), atomic force microscopy(AFM), Fourier transform infrared spectroscopy(FTIR) and Raman spectroscopy(Raman), etc. The results demonstrated that the large-sized graphene quantum dots had an average height of 20 nm and contained abundant carboxyl and hydroxyl groups. Strong ECL was studied in detail with the coreaction of K2S2O8 and the maximum emission wavelength at 685 nm. It is found that LSGQD-NAs can be easily assembled and modified on the surface of GC electrode through the π?π bond action of unoxidized graphene. This study provides a new method for the research of ECL sensor based on graphene quantum dots.

Key words: Large-sized graphene quantum dot assemblies(LSGQD-NAs), Electrogenerated chemiluminescence(ECL), Grapheneoxide(GO), Graphene quantum dots

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