Journal
MATERIALS LETTERS
Volume 316, Issue -, Pages -Publisher
ELSEVIER
DOI: 10.1016/j.matlet.2022.132011
Keywords
Sensors; Electrodeposition; Copper oxide; Carboxylated graphene; Glucose
Funding
- Natural Science Foundation for Young Scientists of Shanxi Province, China [201801D221064]
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A novel electrochemical approach for glucose detection using flower-like copper oxide-carboxylated graphene nanocrystals modified electrode has been developed. The modified electrode exhibits high oxidation peak current, sensitivity, detection range, and response time.
A novel approach for electrochemical detection of glucose has been developed by flower-like copper oxide-carboxylated graphene (CuO-CG) nanocrystals modified electrode. The modified electrode was constructed by the electrodeposition method. CG and copper were successively electrodeposited on a bare glassy carbon electrode (GCE), and then CuO was formed in situ by electrochemical oxidization of the copper film to obtain the final CuO-CG-GCE. Electrocatalytic activity of the CuO-CG-GCE towards glucose oxidation was explored using cyclic voltammetry. The oxidation peak current of glucose obtained by CuO-CG-GCE was more than 130-fold higher than that of the bare GCE. The CuO-CG-GCE could detect glucose from 0.1 mu M to 3.17 mM by chmnoamperometry with a limit of detection of 10 nM, sensitivity of 1295 mu A mM(-1) cm(-2), and response time of 1 similar to 4 s. These results suggested that the CuO-CG nanocrystals could become promising electrode materials for electrochemical sensors.
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