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A non-enzymatic glucose sensing nanocomposite comprised of CoFe2O4 nanosheets grown on Reduced Graphene Oxide (CoFe2O4@rGO) has been triumphantly prepared by a facile co-precipitation process. The characterisation results reveal that the CoFe2O4 nanosheets are vertically grown on the rGO substrate and form a porous network structure. Next, Electrochemical workstation is applied to study the glucose detection performance of the CoFe2O4@rGO. The sensing tests exhibit that when the volume ratio of anhydrous ethanol and deionised water is 10 ml: 30 ml, the fabricated CoFe2O4@rGO has better glucose detection performance. Its linear detection ranges from 0.5 mM – 10 mM and 10 mM – 35 mM, and the sensitivity reaches 50.5 μAmM−1cm−2 and 143.6 μAmM−1cm−2 respectively, which is significantly better than the previously reported non-enzyme glucose sensing materials. Furthermore, the CoFe2O4@rGO has good anti-interference and stability. [ABSTRACT FROM AUTHOR]

Ultrathin and vertical NiCo2O4 nanosheets were grown on nitrogen-doped reduced graphene oxide (NiCo2O4 NSs@N-rGO) through a simple one-step co-precipitation procedure. The NiCo2O4 NSs@N-rGO nanocomposites were investigated through X-ray diffraction (XRD), field emission scanning electron microscopy (FESEM), transmission electron microscopy (TEM), X-ray photoelectron spectroscopy (XPS) and Raman spectroscopy. And the performance of NiCo2O4NSs@N-rGO non-enzymatic glucose sensor was measured by cyclic voltammetry and amperometric method. The sensor exhibited two wide linear ranges of 0.01 mM-5.50 mM and 5.50 mM-15.50 mM with high sensitivity of 4372.9 μA·mM−1cm−2 and 1686.1 μA·mM−1cm−2, which is much better than other Co-based and Ni-based glucose sensors. In addition, the non-enzymatic glucose sensor also shows strong anti-interference and durability. Besides, it is found that this non-enzymatic glucose sensor can accurately measure the blood glucose concentration in human serum, which provides a great possibility for future application in medical treatment. [ABSTRACT FROM AUTHOR]

A distinctive hierarchical hybrid nanostructure which consists of the ultrathin and vertical NiMn2O4 nanosheets grown on reduced graphene oxide (NiMn2O4 NSs@rGO) is synthesised as a non-enzyme glucose sensor by a simple co-precipitation and hydrothermal procedure. The structures and morphologies of the NiMn2O4 NSs@rGO nanocomposites are investigated through X-ray diffraction (XRD), Field emission scanning electron microscopy (FESEM), Transmission electron microscopy (TEM) and X-ray photoelectron spectroscopy (XPS). Cyclic voltammetry and amperometry measurement are applied to analyse the glucose sensing characteristics of NiMn2O4 NSs@rGO. The obtained NiMn2O4 NSs@rGO sensor exhibits two wide linear ranges of 0.001 mM-1 mM and 1 mM-3.5 mM with high sensitivity of 2615.2μAmM−1 cm−2 and 294.8μAmM−1 cm−2, which is much better than other Ni-based and Mn-based glucose sensors. In addition, the NiMn2O4 NSs@rGO nanocomposites have excellent anti-interference and stability. Moreover, the constructed sensor is viable in the analysis of real serum samples, which makes it become a medically dependable non-enzymatic glucose sensor with great possibility. [ABSTRACT FROM AUTHOR]

• In this work, we propose a facile and cost-effective two-step synthesis strategy. • The synthesized CoNi 2 S 4 @NCF has good flexibility and compressibility. Compared with general sensing materials, this flexible material is more conducive to storage and use. More importantly, flexible materials have broad application prospects in wearable instruments. • A series of electrochemical test results show the CoNi 2 S 4 @NCF has better glucose sensing properties than the previously reported sensing materials. And when the volume ratio of deionized water and absolute ethanol is 30ml:30ml, the prepared CoNi 2 S 4 @NCF performance is even better. A flexible non-enzymatic glucose sensing material which consists of the CoNi 2 S 4 nanosheets grown on the reticular Nitrogen-doped Carbon Foam substrate (CoNi 2 S 4 @NCF) has been successfully fabricated by a simple two-step synthesis process. The micromorphology, composition and valence of the CoNi 2 S 4 @NCF are researched by means of FESEM, TEM, XPS and XRD. Subsequently, the glucose sensing characteristics of the CoNi 2 S 4 @NCF are studied by Cyclic Voltammetry and Amperometry, and the detection performance of CoNi 2 S 4 @NCF synthesized by different processes is compared. Through a series of tests, it is found that when the volume ratio of deionized water to anhydrous ethanol is 30 ml: 30 ml, the prepared CoNi 2 S 4 @NCF has excellent glucose sensing properties. The sensitivity is 6.675 μA mM−1 cm−2 and 54.82 μA mM−1 cm−2 over the linear detection range of 0.5–12.5 mM and 12.5–30 mM, respectively. At the same time, the CoNi 2 S 4 @NCF has outstanding anti-interference, stability, repeatability and shows good performance in the detection of actual samples. In addition, the synthesized CoNi 2 S 4 @NCF has good flexibility and compressibility. Compared with general sensing materials, this flexible material is more conducive to storage and use. It provides a new idea for wearable instruments. All these fully indicate that the fabricated CoNi 2 S 4 @NCF have a good prospect in the field of non-enzymatic glucose sensing. [ABSTRACT FROM AUTHOR]