期刊
SENSORS AND ACTUATORS B-CHEMICAL
卷 260, 期 -, 页码 852-860出版社
ELSEVIER SCIENCE SA
DOI: 10.1016/j.snb.2018.01.109
关键词
ZIF-67; Ag nanoparticles; Non-enzymatic electrode; Gluco seensor
资金
- Natural Science Foundation of Hebei Province [B2016209266]
- Natural Science Foundation of China [51772097]
- Department of Science and Technology of Tangshan of China [15130201C]
In this paper, we demonstrated the first application of a Co-based porous metal-organic framework (MOF) ZIF-67 as the glucose electrochemical sensor. The ZIF-67 modified glassy carbon electrode (GCE) showed an excellent catalytic activity towards glucose oxidation. Meanwhile, to improve the electrocatalytic performance of the modified electrode, a novel Ag@ZIF-67 nanocomposite was fabricated through as equential deposition-reduction method. The Ag@ZIF-67/GCE exhibited an enhanced catalytic activity towards glucose oxidation. The electrocatalytic performance of Ag@ZIF-67 with different Ag loadings was investigated, and the results indicated that with the Ag contents increasing from 0% to 0.5%, the response time of the modified electrode was shorten by more than two times, and the sensitivity was increased by two times and a half. The Ag-0.5%@ZIF-67GCE exhibited excellent electrocatalytic performances in the glucose concentration range of 2-1000 mu M, including a high sensitivity of 0.379 mu A mu M-1 cm(-2), a low detection limit of 0.66 mu M (S/N = 3) as well as good selectivity and stability. (C) 2018 Elsevier B.V. All rights reserved.
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