Chem. J. Chinese Universities ›› 2024, Vol. 45 ›› Issue (12): 20240301.doi: 10.7503/cjcu20240301

• Analytical Chemistry • Previous Articles     Next Articles

A Double-Chamber Enzymatic Biofuel Cells-based Self-powered Glucose Biosensor Based on Graphene/Gold Nanoparticles/Titanium Carbide Nanocomposite

LI Shixuan1, MENG Hua1, YIN Xuehu1, YI Jinfei1, MA Lihong1, ZHANG Yanli1(), WANG Hongbin1, YANG Wenrong1,2, PANG Pengfei1()   

  1. 1.Functional Nanomaterial?based Chemical and Biological Sensing Technology Innovation Team of Department of Education of Yunnan Province,Yunnan Minzu University,Kunming 650504,China
    2.School of Life and Environmental Sciences,Deakin University,Geelong 3217,Australia
  • Received:2024-06-24 Online:2024-12-10 Published:2024-08-21
  • Contact: ZHANG Yanli E-mail:ylzhang@ymu.edu.cn;pfpang@aliyun.com
  • Supported by:
    the National Natural Science Foundation of China(21665027);the Applied Basic Research Project of Yunnan Provincial Science and Technology Department, China(202001AT070012);the Graduate Scientific Research Foundation of Yunnan Minzu University, China(2024SKY135)

Abstract:

Enzymatic biofuel cells(EBFCs)-based self-powered sensing device has the advantages of simple structure, easy miniaturization, and no need for external power supply. It exhibits potential application prospects in clinical diagnosis, environmental monitoring, biosensing, and other fields. Graphene/gold nanoparticles/titanium carbide(rGO/AuNPs/Ti3C2) nanocomposite modified glassy carbon electrode(GCE) was used as cathode of EBFCs (rGO/AuNPs/Ti3C2/GCE). The bioanode of EBFCs was prepared via immobilization of glucose oxidase(GOx) on the surface of rGO/AuNPs/Ti3C2/GCE. A double-chamber enzymatic biofuel cells-based self-powered glucose biosensor(EBFCs-SPGB) was constructed by combining as-prepared bioanode and cathode in supporting electrolyte separated with a Nafion membrane. In the presence of target glucose, the GOx fixed on the surface of the bioanode promotes an enzymatic reaction. The electrons generated by catalyzing glucose transferred to the cathode through an external circuit, resulting in a reduction reaction on the cathode surface and generating an electrochemical response signal. Due to the excellent conductivity, biocompatibility, and large specific surface area of rGO/AuNPs/Ti3C2 nanocomposite, the synergistic effect of nanocomposite can significantly increase loading amount of GOx and effectively promote electron transfer on the electrode surface. The maximum power output signal of the constructed EBFCs-SPGB shows a good linear relationship with glucose concentration in the range of 0.3—10 mmol/L, with a detection limit of 0.1 mmol/L(S/N=3), which can be applied to analysis of glucose concentration in human serum samples.

Key words: Glucose, Nanocomposite, Enzymatic biofuel cell, Self-powered electrochemical sensor

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