NiCo₂S₄ Nanowire‐Decorated Flexible Carbon Foam for Sensitive Glucose Sensors

Abstract

Binary nickel cobalt sulfide (NiCo 2 S 4 ) nanostructures have attracted much attention in electrochemistry fields due to its highly catalytic activity and low cost. Herein, NiCo 2 S 4 nanowire arrays grown on three-dimensional carbon foam (NiCo 2 S 4 / 3DCF) is presented for nonenzymatic glucose sensor. Porous NiCo 2 S 4 /3DCF with self-supporting structure was synthesized via a self-designed two-step hydrothermal process, and was fabricated as flexible sensor directly without any modify treatments. The linear range of this sensor is 0.005-13.07 mM (R 2 = 0.999) with detection limit of 0.5 μM (S/N = 3). In addition, the as-proposed sensor also displays other outstanding advantages, including simple of preparation, low cost, perfect reproducibility and good selectivity. Such attracting sensing properties may be due to the high electrocatalytic activity of NiCo 2 S 4 and good electrical conductivity of 3DCF frameworks. Therefore, NiCo 2 S 4 /3DCF may show great promise in glucose sensor applications.

A flexible Ni–Ag-coated nylon yarn as an electrode for non-enzymatic glucose sensing

“…The difference in binding energy between Ni 2p 3/2 and Ni 2p 1/2 is 17.5 eV, indicating the coexistence of Ni 2+ /Ni 3+ . 37 The high resolution spectrum of C 1s in Fig. 3(e).…”

“…Compared with other similar glucose sensors in Table 1, SCNY@Ni shows better performances. These are attributed to the uniform distribution of Ni particles on the surface of SCNY, which provides more pathways of electron transfer; 37 the dendrite structure of its surface, which can accelerate glucose oxidation by increasing the specific surface area; and the synergistic effect of Ag and Ni, which enhances its electrical conductivity and further improves its catalytic ability.…”

A Novel Non-Enzymatic Sensor Prepared by ZnO Nanoneedle Arrays Template for High Performance of Glucose Sensing

“…Moreover, the modification of microstructures, such as nanoparticles, nanoflowers or nanoneedles on the surface of electrodes is often a complicated process. [22][23][24] In order to prepare glucose sensors with high sensitivity, wide linear range, low detection limit and overcome the shortcomings of the existing approches. We developed a novel ZnO-nanoneedlearray templating method.…”