Chem. J. Chinese Universities ›› 2022, Vol. 43 ›› Issue (8): 20220161.doi: 10.7503/cjcu20220161

• Analytical Chemistry • Previous Articles     Next Articles

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)

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

CLC Number: 

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