期刊
IONICS
卷 24, 期 10, 页码 3199-3207出版社
SPRINGER HEIDELBERG
DOI: 10.1007/s11581-018-2514-6
关键词
Cu-Co bimetallic nanostructures; Persimmon-derived macroporous carbon; Glucose; Electrochemical sensor
资金
- National Natural Science Foundation of China [21765009, 21465015]
- Natural Science Foundation of Jiangxi Province [20143ACB21016]
- Scientific Research Foundation of Jiangxi Education Commission [GJJ160288]
A novel non-enzymatic glucose sensor was developed by electrodepositing leafy copper-cobalt nanostructures (Cu-Co NSs) on the persimmon-derived three-dimensional macroporous carbon (PD3DMC). The electrochemical behaviors and the electrocatalytic performances towards the oxidation of glucose of the Cu-Co NSs/PD3DMC were evaluated by cyclic voltammograms, chronoamperometry, and amperometric method. Compared with the sensors based on monometal Cu or Co, the Cu-Co NSs/PD3DMC sensor based on bimetal exhibited good electrocatalytic activity towards the oxidation of glucose. The effects of the electrodeposition potential and the molar ratio of Cu2+ and Co2+ in the electrodeposition solution on the electrocatalytic performance of the resulted Cu-Co NSs/PD3DMC were explored in detail. The optimum catalytic activity of the sensor towards the oxidation of glucose can achieve under the optimized conditions the electrodepositing potential of - 1.2 V and the Cu2+/Co2+ molar ratio of 1:20. The catalytic current density was linear to the glucose concentration in the range of 0.002-2.73 mM (R = 0.9977) with a sensitivity of 2.21 mA cm(-2) mM(-1) and a detection limit of 0.7 mu M.
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