Polyelectrolyte functionalized gold nanoparticles-reduced graphene oxide nanohybrid for electrochemical determination of aminophenol isomers

Li, Xinchun; Zhong, Anni; Wei, Shanshan; Luo, Xin; Liang, Yanjin; Zhu, Qiao

doi:10.1016/j.electacta.2015.02.207

Cited by 56 publications

(13 citation statements)

References 39 publications

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“…Undoubtedly, the developed manganese silicate‐modified electrode was quite qualified for the simultaneous detection of trace levels of 2‐AP and 4‐AP. Compared with mostly reported electrochemical sensors that are listed in Table 1 17–27, we clearly find that the newly‐developed method exhibits higher sensitivity.…”

Section: Introductionmentioning

confidence: 69%

“…Therefore, both of the oxidation of 2‐AP and 4‐AP are two‐electron reaction. Combining the conclusion from the pH effect that the number of protons and electrons take part in the electrochemical reaction is 1:1, so the electrochemical mechanism for 2‐AP and 4‐AP at manganese silicate/GCE can be assumed according to the literatures 17, 19: …”

Section: Resultsmentioning

confidence: 99%

“…Aminophenols involve aromatic amino group, phenolic hydroxyl moiety as well as substitution on the benzene ring, which provide theoretical support for making use of electrochemical methods to detect them based on redox properties of aminophenols. Furthermore, the electrochemical methods are well known for their fast response, good reliability, high sensitivity, inexpensive instrument, low energy consumption, simple operation, time saving and applicability for in situ determination, therefore, the development of electrochemical methods for the simultaneous determination of aminophenol isomers has attracted increasing interest 17–21.…”

Section: Introductionmentioning

confidence: 99%

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Fabrication of Hierarchical Hollow Manganese Silicate Spheres for the Simultaneous Enhanced Determination of 2‐Aminophenol and 4‐Aminophenol

Sun

Shi

et al. 2015

Electroanalysis

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We developed a new electrochemical method for the simultaneous determination of 2‐aminophenol (2‐AP) and 4‐aminophenol (4‐AP) based on hollow manganese silicate spheres. The hierarchical hollow structure of manganese silicate submicrometer spheres was formed by the assemblage of numerous nanobubbles, as confirmed by scanning electron microscopy and transmission electron microscopy images. As sensing material for the simultaneous determination of 2‐AP and 4‐AP for the first time, the electrochemical performances of 2‐AP and 4‐AP were studied in detail. The detection limits (S/N=3) for 2‐AP and 4‐AP were as low as 18 and 11 nM, respectively.

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Section: Introductionmentioning

confidence: 69%

Section: Resultsmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

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Fabrication of Hierarchical Hollow Manganese Silicate Spheres for the Simultaneous Enhanced Determination of 2‐Aminophenol and 4‐Aminophenol

Sun

Shi

et al. 2015

Electroanalysis

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“…The prepared composite was dispersed and placed onto an Au electrode by drop-casting in order to develop a voltammetric sensor for dopamine. Li et al [109] showed that aminophenol isomers can be easily detected by differential pulse voltammetry using a GCE decorated with AuNPs and an rGO composite coated with PDDA. The composite was prepared by the sequential thermal reductions of GO and AuCl 4 − in the presence of PDDA.…”

Section: Sensing Film Comprising Me or Meo Npsmentioning

confidence: 99%

Polyelectrolytes Assembly: A Powerful Tool for Electrochemical Sensing Application

Rončević

Krivić

Buljac

et al. 2020

Sensors

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The development of sensing coatings, as important sensor elements that integrate functionality, simplicity, chemical stability, and physical stability, has been shown to play a major role in electrochemical sensing system development trends. Simple and versatile assembling procedures and scalability make polyelectrolytes highly convenient for use in electrochemical sensing applications. Polyelectrolytes are mainly used in electrochemical sensor architectures for entrapping (incorporation, immobilization, etc.) various materials into sensing layers. These materials can often increase sensitivity, selectivity, and electronic communications with the electrode substrate, and they can mediate electron transfer between an analyte and transducer. Analytical performance can be significantly improved by the synergistic effect of materials (sensing material, transducer, and mediator) present in these composites. As most reported methods for the preparation of polyelectrolyte-based sensing layers are layer-by-layer and casting/coating methods, this review focuses on the use of the latter methods in the development of electrochemical sensors within the last decade. In contrast to many reviews related to electrochemical sensors that feature polyelectrolytes, this review is focused on architectures of sensing layers and the role of polyelectrolytes in the development of sensing systems. Additionally, the role of polyelectrolytes in the preparation and modification of various nanoparticles, nanoprobes, reporter probes, nanobeads, etc. that are used in electrochemical sensing systems is also reviewed.

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“…EIS measurement was carried out in 0.1 M PBS containing 500 µM ETB over a frequency range of 0.1 Hz to 10 5 Hz with the AC signal amplitude of 10 mV, Figure 2. Generally, the Nyquist plot of the EIS is characterized by two important regions: a semicircular region at a higher frequency corresponding to the electron-transfer-limited process and a linear portion at low frequency region featuring diffusion limited process [20,21]. The diameter of the semicircular portion is equivalent to the charge transfer resistance (R ct ).…”

Section: Electrochemical Impedance Spectroscopy (Eis)mentioning

confidence: 99%

Sensitive electrochemical determination of ethambutol in pharmaceutical formulation and human urine at nickel nanoparticles/electrochemically reduced graphene oxide modified electrode

Mekassa¹,

Baker²,

Chandravanshi³

et al. 2019

Bull. Chem. Soc. Eth.

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This paper describes the application of nickel nanoparticles decorated electrochemically reduced graphene oxide modified glassy carbon electrode (NiNPs/ERGO/GCE) for the determination of ethambutol (ETB), an anti-Mycobacterium tuberculosis drug. The modified electrode showed remarkable electrocatalytic properties accompanied with a significant enhancement in the peak current response towards ETB compared to the bare electrode. The results showed that the composite modified electrode played a significant catalytic role due to the synergetic effect of NiNPs and ERGO. The NiNPs/ERGO modified electrode demonstrated excellent square wave voltammetric response towards ETB determination at the NiNPs/ERGO/GCE in the range 0.05-100 µM. The sensor demonstrated outstanding sensitivity towards ETB determination with limit of detection (LOD) and limit of quantification (LOQ) of 0.023 and 0.075 µM, respectively. The developed sensor was effectively validated for real sample study using drug formulation and urine samples which showed an acceptable recovery (99.6-109%). The electrode also exhibited good precision (RSD < 1%, n = 20), reproducibility (RSD < 1.9%, n = 3), long-term stability (92% of its initial response after two weeks) and selectivity towards interfering substances in the determination of ethambutol.

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Polyelectrolyte functionalized gold nanoparticles-reduced graphene oxide nanohybrid for electrochemical determination of aminophenol isomers

Cited by 56 publications

References 39 publications

Fabrication of Hierarchical Hollow Manganese Silicate Spheres for the Simultaneous Enhanced Determination of 2‐Aminophenol and 4‐Aminophenol

Fabrication of Hierarchical Hollow Manganese Silicate Spheres for the Simultaneous Enhanced Determination of 2‐Aminophenol and 4‐Aminophenol

Polyelectrolytes Assembly: A Powerful Tool for Electrochemical Sensing Application

Sensitive electrochemical determination of ethambutol in pharmaceutical formulation and human urine at nickel nanoparticles/electrochemically reduced graphene oxide modified electrode

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