Electrochemical biosensor based on Cu/Cu2O nanocrystals and reduced graphene oxide nanocomposite for sensitively detecting ractopamine

Wang, Minghua; Kang, Mengmeng; Guo, Chuanpan; Fang, Shaoming; He, Linghao; Jia, Chuanbao; Zhang, Gaihong; Bai, Bing; Zong, Wei

doi:10.1016/j.electacta.2015.09.138

Cited by 34 publications

(1 citation statement)

References 48 publications

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“…Different kinds of metal oxide composite materials have been considered as a favorable choice and have attracted the attention of many researchers in the development of biosensors because of their unique physical and chemical features, such as a cuprous oxide (Cu 2 O), which offers (i) a non‐toxic semiconductor, (ii) absorber material, (iii) mesoporosity, (iv) high affinity, (v) fast electron mobility, (vi) relatively higher surface area, and (vii) unique electrochemical capability [20, 21]. Manganese dioxide (MnO 2 ) provides (i) a catalytic activity, (ii) abundant availability, (iii) absorption ability and (iv) low toxicity [22, 23].…”

Section: Introductionmentioning

confidence: 99%

Choline Oxidase Based Composite ZrO₂@AuNPs with Cu₂O@MnO₂ Platform for Signal Enhancing the Choline Biosensors

et al. 2020

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A novel metal composite material based on zirconium dioxide decorated gold nanoparticles (ZrO2@AuNPs), copper (I) oxide at manganese (IV) oxide (Cu2O@MnO2) and immobilized choline oxidase (ChOx) onto a glassy carbon electrode (GCE) (ChOx/Cu2O@MnO2‐ZrO2@AuNPs/GCE) has been developed for enhancing the electro‐catalytic property, sensitivity and stability of the amperometric choline biosensor. The ChOx/Cu2O@MnO2‐ZrO2@AuNPs/GCE displayed an excellent electrocatalytic response to the oxidation of the byproduct H2O2 from the choline catalyzed reaction, which exhibited a charge transfer rate constant (Ks) of 0.97 s−1, a diffusion coefficient value (D) of 4.50×10−6 cm2 s−1, an electroactive surface area (Ae) of 0.97 cm2 and a surface concentration (γ) of 0.54×10−8 mol cm−2. The modified electrode also provided a wide linear range of choline concentration from 0.5 to 1,000.0 μM with good sensitivity (97.4 μA cm−2 mM−1) and low detection limit (0.3 μM). The apparent Michaelis‐Menten constant was found to be 0.08 mM with Imax of 0.67 μA. This choline biosensor presented high repeatability (%RSD=2.9, n=5), excellent reproducibility (%RSD=2.9, n=5), long time of use (n=28 with %I>50.0 %) and good selectivity without interfering effects from possible electroactive species such as ascorbic acid, aspirin, amoxicillin, caffeine, dopamine, glucose, sucrose and uric acid. This optimal method was successfully applied for choline measurement in prepared human blood samples which demonstrated accurate and excellent reliability in the recovery range from 96.7 to 102.0 %.

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Section: Introductionmentioning

confidence: 99%

Choline Oxidase Based Composite ZrO₂@AuNPs with Cu₂O@MnO₂ Platform for Signal Enhancing the Choline Biosensors

et al. 2020

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Analytical Capabilities of Some Immunosensors for the Determination of Drugs

Medyantseva

Брусницын

Gazizullina

et al. 2021

Macro, Micro, and Nano-Biosensors

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Characterization of ZnO-Cu2O crystal films by electrochemical codeposition

Liau

Kuo

2019

J Solid State Electrochem

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Electrochemical biosensor based on Cu/Cu2O nanocrystals and reduced graphene oxide nanocomposite for sensitively detecting ractopamine

Cited by 34 publications

References 48 publications

Choline Oxidase Based Composite ZrO₂@AuNPs with Cu₂O@MnO₂ Platform for Signal Enhancing the Choline Biosensors

Choline Oxidase Based Composite ZrO₂@AuNPs with Cu₂O@MnO₂ Platform for Signal Enhancing the Choline Biosensors

Analytical Capabilities of Some Immunosensors for the Determination of Drugs

Characterization of ZnO-Cu2O crystal films by electrochemical codeposition

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Electrochemical biosensor based on Cu/Cu2O nanocrystals and reduced graphene oxide nanocomposite for sensitively detecting ractopamine

Cited by 34 publications

References 48 publications

Choline Oxidase Based Composite ZrO2@AuNPs with Cu2O@MnO2 Platform for Signal Enhancing the Choline Biosensors

Choline Oxidase Based Composite ZrO2@AuNPs with Cu2O@MnO2 Platform for Signal Enhancing the Choline Biosensors

Analytical Capabilities of Some Immunosensors for the Determination of Drugs

Characterization of ZnO-Cu2O crystal films by electrochemical codeposition

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Product

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Choline Oxidase Based Composite ZrO₂@AuNPs with Cu₂O@MnO₂ Platform for Signal Enhancing the Choline Biosensors

Choline Oxidase Based Composite ZrO₂@AuNPs with Cu₂O@MnO₂ Platform for Signal Enhancing the Choline Biosensors