A ultrasensitive nonenzymatic glucose sensor based on Cu2O polyhedrons modified Cu electrode

Luo, Zhihua; Han, Ting; Qu, Ling Ling; Wu, Xiang

doi:10.1016/j.cclet.2012.06.003

Cited by 15 publications

(7 citation statements)

References 17 publications

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“…Although nanomaterials such as Carbon nanotubes (CNT) and graphene are blended with CuO nanoparticles [28] giving an improved conductivity, a direct contact of CuO with glucose and an accelerated electron transfer remains desirable for improved sensitivity and responsive speed. In situ fabrication methods have been explored in previous studies by chemical or electrochemical oxidation under different conditions [29,30,31,32]. Here, we present a new method for an in situ fabrication of a Cu 2 O-based glucose electrode, in which a Cu 2 O electrode was prepared by electrooxidation of metallic copper as an anode in alkaline solution, forming a Cu 2 O layer which consists of particles with diameters of 30–150 nm on the surface of the Cu electrode.…”

Section: Introductionmentioning

confidence: 99%

In Situ Oxidation of Cu2O Crystal for Electrochemical Detection of Glucose

Ren

et al. 2019

Sensors

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The development of a sensitive, quick-responding, and robust glucose sensor is consistently pursued for use in numerous applications. Here, we propose a new method for preparing a Cu2O electrode for the electrochemical detection of glucose concentration. The Cu2O glucose electrode was prepared by in situ electrical oxidation in an alkaline solution, in which Cu2O nanoparticles were deposited on the electrode surface to form a thin film, followed by the growth of Cu(OH)2 nanorods or nanotubes. The morphology and electrocatalytic activity of a Cu2O glucose electrode can be tuned by the current density, reaction time, and NaOH concentration. The results from XRD, SEM, and a Raman spectrum show that the electrode surface was coated with cubic Cu2O nanoparticles with diameters ranging from 50 to 150 nm. The electrode exhibited a detection limit of 0.0275 mM, a peak sensitivity of 2524.9 μA·cm−2·mM−1, and a linear response range from 0.1 to 1 mM. The presence of high concentrations of ascorbic acid, uric acid, dopamine and lactose appeared to have no effects on the detection of glucose, indicating a high specificity and robustness of this electrode.

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Section: Introductionmentioning

confidence: 99%

In Situ Oxidation of Cu2O Crystal for Electrochemical Detection of Glucose

Ren

et al. 2019

Sensors

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“…However, the greatest drawback of enzymatic sensors is their lack of stability due to the intrinsic nature of enzymes. [1][2][3][4][5][6] Hence, it is pertinent to explore and develop a non-enzymatic sensor with high sensitivity and stability for the determination of glucose by electrochemical oxidation. Transition metal oxides CuO is a narrow band gap p-type semiconductor (1.2 eV) and has been recognized as an important material for a variety of practical applications, such as catalysis, batteries, solar energy conversion, gas sensing, and field emission.…”

Section: Introductionmentioning

confidence: 99%

Synthesis of Graphite Oxide-Wrapped CuO Nanocomposites for Electrocatalytic Oxidation of Glucose

Chen

et al. 2014

Synthesis and Reactivity in Inorganic, Metal-Organic, and Nano-

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GO/CuO nanocomposite had been successfully synthesized by electrostatic interactions method. X-ray powder diffraction(XRD), Scanning electron microscopy(SEM), transmission electron microscope(TEM), selective-area electron diffraction(SAED), Fourier transform infrared spectroscopy(FT-IR), and Raman spectra confirmed the structure of the CuO and GO/CuO nanocomposite. The property of GO/CuO nanocomposite for electrocatalytic oxidation of glucose was investigated by cyclic voltammetry. The experimental results indicate that the GO/CuO nanocomposite modified electrode allows highly sensitive and low working potential of glucose and is promising for the future development of non-enzymatic glucose sensors.

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“…Cu 2 O is an important p‐type semiconductor with a bandgap of 2.17 eV, and has attracted much attention due to its ultra‐low potential for electron transfer, higher exciton binding energy, non‐toxicity, and low price [8, 9]. Therefore, varieties of Cu 2 O nanostructure, including hollow nanocubes [10], nanowires [11], nanospheres [12], polyhedrons [13] were synthesised and investigated to improve the electrochemical activities in glucose sensing. It is noted that the hollow or porous Cu 2 O has more exposed sites and more channels to facilitate glucose diffusion and electron transfer [8].…”

Section: Introductionmentioning

confidence: 99%

Cu ₂ O hollow microspheres as electrode materials for non‐enzymatic electrochemical detection of glucose

Zhang

Wang

et al. 2020

Micro & Nano Letters

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An enzyme‐free glucose electrochemical sensor with high sensitivity and selectivity is highly attractive. In this work, an enzyme‐free glucose sensor with Cu2O hollow microspheres (Cu2O HMs) was prepared via hydrothermal method. The glucose sensor constructed by the prepared Cu2O HM structure exhibited a low detection limit of 0.13 μM, a high sensitivity of 277.1 μA/mM cm2, and the wide linear ranges of 0.05–1.5 and 1.5–6.0 mM. Furthermore, anti‐interference tests indicated that the prepared sensor exhibited good selectivity for glucose and practical application in human serum. The Cu2O sensor has great application potential in the development of enzyme‐free glucose sensor.

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A ultrasensitive nonenzymatic glucose sensor based on Cu2O polyhedrons modified Cu electrode

Cited by 15 publications

References 17 publications

In Situ Oxidation of Cu2O Crystal for Electrochemical Detection of Glucose

In Situ Oxidation of Cu2O Crystal for Electrochemical Detection of Glucose

Synthesis of Graphite Oxide-Wrapped CuO Nanocomposites for Electrocatalytic Oxidation of Glucose

Cu ₂ O hollow microspheres as electrode materials for non‐enzymatic electrochemical detection of glucose

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A ultrasensitive nonenzymatic glucose sensor based on Cu2O polyhedrons modified Cu electrode

Cited by 15 publications

References 17 publications

In Situ Oxidation of Cu2O Crystal for Electrochemical Detection of Glucose

In Situ Oxidation of Cu2O Crystal for Electrochemical Detection of Glucose

Synthesis of Graphite Oxide-Wrapped CuO Nanocomposites for Electrocatalytic Oxidation of Glucose

Cu 2 O hollow microspheres as electrode materials for non‐enzymatic electrochemical detection of glucose

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Cu ₂ O hollow microspheres as electrode materials for non‐enzymatic electrochemical detection of glucose