Journal
CHEMELECTROCHEM
Volume 4, Issue 6, Pages 1419-1428Publisher
WILEY-V C H VERLAG GMBH
DOI: 10.1002/celc.201700078
Keywords
Cu/Ni; non-enzymatic sensors; glucose; ethanol; graphene
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Funding
- National Natural Science Foundation of China [21501004, 21071005, 21271006]
- Research Culture Funds of Anhui Normal University [2014xmpy13]
- Innovation Funds of Anhui Normal University [2014cxjj13]
- Foundation of the Natural Science Foundation of Anhui Higher Education Institutions of China [KJ2015 A158]
- Key Projects of the Outstanding Young Talents in Anhui Higher Education Institutions of China [gxyqZD2016169]
- China Postdoctoral Science Foundation Funded Project [2015 M581731]
- Jiangsu Planned Projects for Postdoctoral Research Funds [1501066C]
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Copper/nickel nanoparticle-decorated N-doped graphene (Cu/Ni/N-graphene) hybrids were prepared by using a solvothermal method, and further employed as a sensing material for fabricating a sensitive non-enzymatic glucose and ethanol sensor. Compared with Cu, Cu/N-graphene, Ni, Ni/N-graphene, Cu-50/Ni-50 nanoparticles, and Cu-51/Ni-49/graphene, the Cu-52/Ni-48/Ngraphene showed enhanced electrochemical activity to glucose and ethanol oxidation, owing to the synergetic effects of Cu and Ni together with N-graphene sheets in the hybrids. The results showed that the Cu-52/Ni-48/N-graphene hybrid-modified electrode exhibited excellent performance for glucose detection with a wider linear range (from 0.5 mu M to 4.6 mM), lower limit of detection (0.2 mu M, S/N=3), and higher sensitivity (1847.56 mu A mM(-1)cm(-2)) than other modified electrodes. Furthermore, the presented non-enzymatic sensor also displayed a good response toward ethanol oxidation with a wide linear range from 0.2 to 37.1 mM, lower detection limit of 0.1 mM (S/N=3), and faster response time (5 s). These results indicated that the excellent properties could promote the potential application of the bimetals and N-graphene sheets as enhanced materials in constructing non-enzymatic sensors for electrochemical analysis.
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