Journal
MICROCHIMICA ACTA
Volume 184, Issue 3, Pages 943-949Publisher
SPRINGER WIEN
DOI: 10.1007/s00604-017-2079-5
Keywords
Ordered porous materials; X-ray diffraction; Transmission electron microscopy; Adsorption isotherms; Pore size; Electrocatalysis; Amperometric detection; Cyclic voltammetry; Nanomaterials; SiO2 template
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Funding
- Program for New Century Excellent Talents of the University in China [NCET-13-0645]
- National Natural Science Foundation of China [NSFC-51202106, 21671170, 21673203]
- Innovation Scientists and Technicians Troop Construction Projects of Henan Province [164200510018]
- Program for Innovative Research Team (in Science and Technology) in University of Henan Province [14IRTSTHN004]
- Qing Lan project
- Six Talent Plan [2015-XCL-030]
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Ordered porous Co3O4 materials with pore sizes of 5 nm (Co3O4-5), 20 nm (Co3O4-20), and 70 nm (Co3O4-70) have been synthesized via a hard-template method and were studied as catalysts to bring insight into non-enzymatic electrochemical sensing of glucose. A glassy carbon electrode modified with Co3O4-70 responds more quickly and sensitively to glucose than those modified with Co3O4-5 or Co3O4-20. The sensor based on the use of Co3O4-70 and operated at a working voltage of 0.6 V (vs. Ag/AgCl) in 0.1 M NaOH solution shows a lower detection limit of 0.025 mu M, good repeatability and high selectivity over ascorbic acid, uric acid, dopamine, and KCl. These results suggest that ordered porous Co3O4 is a promising material for quantitative electrochemical determination of glucose, and that the pore size has a strong effect on performance.
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