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Journal of Electrochemistry ›› 2022, Vol. 28 ›› Issue (1): 2104211.  doi: 10.13208/j.electrochem.210421

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A Flexible Enzymeless Glucose Sensor via Electrodepositing 3D Flower-like CoS onto Self-Supporting Graphene Tape Electrode

Jiang Li1, Zuo-Peng Li1, Yun-Feng Bai1, Su-Xing Luo2, Yong Guo1, Ya-Yan Bao1, Rong Li3, Hai-Yan Liu4, Feng Feng1,*()   

  1. 1. School of Chemistry and Chemical Engineering, Shanxi Datong University, Datong 037009, Shanxi, P.R. China
    2. Department of Chemistry and Chemical Engineering, Zunyi Normal College, Zunyi 563006, Guizhou, P.R. China
    3. College of Chemistry and Chemical Engineering, China West Normal University, Nanchong 637000, Sichuan, P.R. China
    4. School of Life and Science, Shanxi Datong University, Datong 037009, Shanxi, P.R. China
  • Received:2021-04-21 Revised:2021-06-30 Online:2022-01-28 Published:2021-08-03
  • Contact: Feng Feng E-mail:feng-feng64@263.net

Abstract:

Three-dimensional (3D) nanostructural Flower-like cobalt sulfide (CoS) on flexible self-supporting graphene tape electrode (GTE) with remarkably electrocatalytic activity toward glucose was successfully prepared by electrodeposition. Structural characterizations revealed that the electrodeposited CoS was highly dispersed on GTE as an active material. The fabricated binder-free and self-standing CoS/GTE shows a good linear response in the range of 0.025 ~ 1.0 mmol·L-1, reaching a high glucose sensitivity value of 323.3 μA·(mmol·L -1)-1·cm-2 and a low detection limit of 8.5 μmol·L -1 (S/N = 3). Moreover, the as-prepared sensor was well applied for glucose determination in human serum. Thus, the self-supporting, binder-free, low-cost sensor has good potential as a promising device for practical quantitative analysis of glucose in human serum.

Key words: flexible electrode, flower-like CoS, electrodeposition, glucose sensor