An electrochemical aptamer sensor for rapid quantification sulfadoxine based on synergistic signal amplification of indole and MWCNTs and its electrooxidation mechanism

Chen, Fang-Li; Song, Ke-Hang; Xu, Jiang-Tao; Wang, Kun-Zhi; Feng, Xiao-Zhen; Han, Guo-Cheng; Kraatz, Heinz-Bernhard

doi:10.1016/j.snb.2023.135008

Cited by 15 publications

(4 citation statements)

References 43 publications

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“…Electrochemical performance of different sensors.-Modification of the electrode by different modifying materials produces different electrocatalytic effects on the target. 29,30 Figure 1A shows the DPV response of different electrodes to a 600.00 μmol l −1 NRG solution. First, 600.00 μmol l −1 NRG is detected with a bare GCE.…”

Section: Resultsmentioning

confidence: 99%

“…The CV diagram indicates that the reaction of NRG in this system is irreversible. Consequently, the number of electrons (n) and the transfer coefficient (α) involved in the electrochemical reaction can be determined by the Laviron equation: 30,33 "E p " represents the peak potential of the anodic potential. The letters "R", "F", and "T" correspond to the molar gas constant, Faraday's constant, and thermodynamic temperature, respectively.…”

Section: Resultsmentioning

confidence: 99%

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Construction of rGO and GSH Electrochemical Sensor by Electrodeposition for Naringenin Sensing

Hu,

Xu,

et al. 2024

J. Electrochem. Soc.

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Naringenin (NRG), a flavanone compound present in citrus fruits, has a variety of beneficial physiological active functions such as antioxidant, anti-inflammatory, and hypoglycaemic. In this study, an sensor was constructed by electrodeposition and used for the electrochemical study of NRG. Reduced graphene oxide (rGO) and glutathione (GSH) showed the ability to synergistically amplify NRG signals and possessed good linearity in the concentration range of 10.00–1200.00 μmol l−1. The linear equation is Ip = 0.0776logc + 0.9353 (R2 = 0.9901), and the limit of detection is 3.33 μmol l−1. The sensor performed well in terms of reproducibility, stability, and selectivity, which in turn enabled the detection of NRG in tomatoes. The average recovery of the sensor is 95.68% to 111.92%, with RSD less than 11.89%. The results were also verified by Ultraviolet–visible spectroscopy(UV-vis). Furthermore, density-functional theory was employed to analyse the front track of the NRG, speculating that the NRG underwent a transfer of two electrons and two protons.

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Section: Resultsmentioning

confidence: 99%

Section: Resultsmentioning

confidence: 99%

Construction of rGO and GSH Electrochemical Sensor by Electrodeposition for Naringenin Sensing

Hu,

Xu,

et al. 2024

J. Electrochem. Soc.

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“…The conductivity of different electrodes can be obtained based on the charge transfer resistance (R ct ) value by selecting a suitable equivalent circuit model based on the reaction. [44,45] Figure 3B depicts Nyquist plots of bare GCE, Cu-h-BN/GCE, Lu-h-BN/GCE, Lu-Cu/GCE, and Lu-Cu@h-BN/GCE in 5 mM [Fe (CN) 6 ] 3À /4À with 0.1 M KCl solution. It was observed that the diameter of the semicircle displayed by the bare GCE in the EIS was extremely wide which result to greater R ct value, indicating poor conductivity of the electrode.…”

Section: Electrochemical Characterization Of Different Modified Elect...mentioning

confidence: 99%

“…Generally, the signal varies across acidic, neutral, and alkaline conditions. [44] Herein, the effect of buffer pH on the oxidation response of Lu-Cu@h-BN/GCE toward 50 μM CIP was investigated by CV in 0.1 M PBS over the pH range (3, 5, 7 and 9) as illustrated in Figure 4A, B. It was clear that increasing pH from 3 to 9 leads to an initial rise and subsequent decline in oxidation peak current response, coupled with a leftward shift in peak potential, which indicates that the sensor performs better in more acidic electrolyte solution due to the involvement of protons during the oxidation of CIP.…”

Section: Electrochemical Oxidation Of Cip At Different Ph and Scan Ra...mentioning

confidence: 99%

Lutetium Copper@Hexagonal Boron Nitride Nanocomposite Electrode System for Sensing and Signalling Ciprofloxacin

Nepfumbada,

Mamba,

Bartlett

et al. 2024

ChemElectroChem

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Herein, a new electrochemical sensing system based on lutetium copper nanoparticles supported on hexagonal boron nitride (Lu‐Cu@h‐BN) was designed for the sensitive detection of ciprofloxacin (CIP) antibiotic. A simple hydrothermal method was used to synthesize the nanocomposite. The structural and morphological characteristics of the as‐prepared nanocomposite were investigated using various analytical techniques such as Fourier transform infrared spectroscopy (FTIR), X‐ray diffraction (XRD), scanning electron microscopy (SEM), and X‐ray photoelectron spectroscopy (XPS). The newly developed Lu‐Cu@h‐BN nanocomposite was used as an electrode modifier for sensing and signalling of CIP. Cyclic voltammetry (CV) and electrochemical impedance spectroscopy (EIS) were used to study the electrochemical activities of the bare GCE, Cu‐h‐BN/GCE, Lu‐h‐BN/GCE, Lu‐Cu/GCE, and Lu‐Cu@h‐BN/GCE. The electro‐oxidation of CIP on electrode surface exhibited an irreversible, diffusion‐controlled process. The sensor system obtained a wider linear range of (0.05–100 μM) with a lower detection limit value of 0.03 μM and sensitivity 0.7443 μA μM−1 cm−2. Furthermore, the sensor demonstrated an excellent selectivity, good stability, and reproducibility, with acceptable recoveries of 96 % to 104 % in real water sample analysis.

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Enzyme-free glucose sensor based on electrodeposition of multi-walled carbon nanotubes and Zn-based metal framework-modified gold electrode at low potential

Xue,

Chen,

Chen

et al. 2024

Electrochimica Acta

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An electrochemical aptamer sensor for rapid quantification sulfadoxine based on synergistic signal amplification of indole and MWCNTs and its electrooxidation mechanism

Cited by 15 publications

References 43 publications

Construction of rGO and GSH Electrochemical Sensor by Electrodeposition for Naringenin Sensing

Construction of rGO and GSH Electrochemical Sensor by Electrodeposition for Naringenin Sensing

Lutetium Copper@Hexagonal Boron Nitride Nanocomposite Electrode System for Sensing and Signalling Ciprofloxacin

Enzyme-free glucose sensor based on electrodeposition of multi-walled carbon nanotubes and Zn-based metal framework-modified gold electrode at low potential

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