Facile synthesis of CuO–Co3O4 prickly-sphere-like composite for non-enzymatic glucose sensors

• Published in: Rare metals Vol. 41; no. 6; pp. 1911 - 1920
• Main Authors: Wang, Dong, Zhao, Hua-Min, Guo, Li, Zhang, Long, Zhao, Hong-Bin, Fang, Xuan, Li, Sheng, Wang, Gong
• Format: Journal Article
• Language: English
• Published: Beijing Nonferrous Metals Society of China 2022; Springer Nature B.V
• Subjects: Biomaterials; Chemical sensors; Chemistry and Materials Science; Cobalt oxides; Copper oxides; Electron microscopy; Energy; Glucose; Materials Engineering; Materials Science; Metallic Materials; Microscopy; Morphology; Nanoscale Science and Technology; Original Article; Photoelectrons; Physical Chemistry; Selectivity; Sensors; Spectrum analysis; Synergistic effect; X-ray spectroscopy; Prickly-sphere-like morphology; High selectivity; CuO–Co; Non-enzymatic glucose sensor; O; nanowire
• ISSN: 1001-0521; 1867-7185
• DOI: 10.1007/s12598-021-01939-2

In the field of glucose sensors, the development of inexpensive and high-efficiency electrochemical glucose sensors is the current research hotspot. In this paper, CuO–Co 3 O 4 composite with a prickly-sphere-like morphology is prepared by the facile hydrothermal method for the non-enzymatic electrochemical glucose detection. X-ray diffraction, scanning electron microscopy, transmission electron microscopy, energy-dispersive X-ray spectroscopy, and X-ray photoelectron spectroscopy are used to analyze the structure, composition, and morphology of the material. In addition, the electrochemical catalytic performance of CuO–Co 3 O 4 to glucose is obtained by cyclic voltammetry and chronoamperometry. The excellent electrochemical sensing performance may be attributed to the large number of catalytic sites in the prickly-sphere-like composite and the synergistic effect of Cu and Co. Under an applied voltage of 0.55 V, CuO–Co 3 O 4 composite shows sensitivity to glucose (1503.45 μA·(mmol·L −1 ) −1 ·cm −2 ), a low detection limit (21.95 μmol·L −1 ), excellent selectivity, a high level of reproducibility, and good stability. This indicates that the CuO–Co 3 O 4 composite has a broad prospect of non-enzymatic glucose sensing application. Graphical abstract