• 文献标题:   A novel preparation of water-dispersed graphene and their application to electrochemical detection of dopamine
  • 文献类型:   Article
  • 作  者:   TIAN J, WU W
  • 作者关键词:   waterdispersed graphene, electrochemical exfoliation, alternating voltage, dopamine
  • 出版物名称:   ADVANCED POWDER TECHNOLOGY
  • ISSN:   0921-8831 EI 1568-5527
  • 通讯作者地址:  
  • 被引频次:   4
  • DOI:   10.1016/j.apt.2021.01.011 EA FEB 2021
  • 出版年:   2021

▎ 摘  要

In the paper, water-dispersed graphene-GQDs composites were prepared by electrochemical exfoliation under alternating voltage combining ultrasonic treatment. The effects of alternating voltage, alternating frequency and the distance between electrodes were carefully explored. The results showed that the quality of composites prepared by alternating voltage was higher than that by direct voltage. The existence of graphene quantum dots (GQDs) hindered the agglomeration of graphene and facilitated dispersion of graphene in water. The sensor based on the obtained graphene-GQDs composites was used to detect dopamine (DA). The electrochemical investigation showed that the sensor had good selectivity and wide linear ranges for the detection of DA (0.1-100 mM). The detection limit could be down to 3 x 10(-8) M (S/N = 3) with a sensitivity of 14.25 mu A mu M-1 cm(-2). (c) 2021 The Society of Powder Technology Japan. Published by Elsevier B.V. and The Society of Powder Technology Japan. All rights reserved.