CuCo₂O₄nanowire arrays supported on carbon cloth as an efficient 3D binder-free electrode for non-enzymatic glucose sensing

Abstract

CuCo 2 O 4 nanowire arrays supported on carbon cloth (CuCo 2 O 4 NWAs/CC) were prepared via a simple hydrothermal synthesis and subsequent calcination process. As a 3D binder-free electrode for nonenzymatic glucose sensing, CuCo 2 O 4 NWAs/CC shows high sensing performance towards glucose under alkaline conditions, with a wide detection range from 1 mM to 0.93 mM, a low detection limit of 0.5 mM (S/N ¼ 3), and a high detection sensitivity of 3.93 mA mM À1 cm À2. Moreover, CuCo 2 O 4 NWAs/CC shows good selectivity in the presence of common interferents and good reproducibility for glucose detection, which make it a promising electrode material for sensitive determination of glucose in human samples.

Alleviating concentration polarization: a micro three-electrode interdigitated glucose sensor based on nanoporous gold from a mild process

“…4,[6][7][8][9] Different kinds of materials have been applied to construct nonenzymatic glucose sensors including metals, alloys, metal oxides, and carbon. [10][11][12][13][14][15] Among all kinds of materials, nanostructure metals are one of the most potential ones since they can supply more surface active sites and exhibit much higher catalytic performance. [16][17][18][19][20] Nanostructure gold has received much attention due to its high catalytic activity and biocompatibility.…”

Fabrication of Hierarchically Structured MOF‐Co3O4 on Well‐aligned CuO Nanowire with an Enhanced Electrocatalytic Property

“…Therefore, the redox peak may be correlated with the irreversible transition between CoO and CoOOH and between CoOOH and CoO 2 respectively. The electrochemically reversible redox reactions in the alkaline medium can be formulated as follows : …”

“…These results suggested that MOF Co 3 O 4 anchored on the surface of CuO NWs showed excellent electrocatalytic activity and play a crucial electrochemical nano‐enzymatic glucose sensor. According to the previous reports the possible mechanism of the electrochemical oxidation of glucose is proposed as follows: …”

“…These results suggested that MOF Co 3 O 4 anchored on the surface of CuO NWs showed excellent electrocatalytic activity and play a crucial electrochemical nano-enzymatic glucose sensor. According to the previous reports [32,37] the possible mechanism of the electrochemical oxidation of glucose is proposed as follows:…”

“…In the case of noble metals are relatively more expensive, which hamper the commercial application of the non -enzymatic glucose sensor. Thus, metal oxide based nanostructure is not only used in glucose sensor applications, but also applicable in the field of electrochemical immunosensor because of their lower cost, controllable synthesis, functional biocompatibility, chem- 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 51 52 53 54 55 56 57 58 ical stability, enhanced electron-transfer kinetics, and strong glucose adsorption capabilities [26,28,[32][33][34][35][36][37]. Metal oxides such as CuO and Co 3 O 4 have established a great deal of attention owing to the environmentally friendly nature and relatively good conductivity, simple synthesis process, superior electrochemical property, and good chemical stability.…”