Facile one-pot synthesis of Au–PEDOT/rGO nanocomposite for highly sensitive detection of caffeic acid in red wine sample

Liu, Zhen; Xu, Jingkun; Yue, Ruirui; Yang, Taotao; Gao, Lei

doi:10.1016/j.electacta.2016.02.178

Cited by 96 publications

(48 citation statements)

References 44 publications

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“…4C), which correspond to the C-C, C-S and C-O bonds in Poly(EDOT-MeSH), respectively. [65][66][67] The S 2p spectra of Poly(EDOT-MeSH) showed spin-split doublet peaks at 163.7 (S 2p 3/2 ) and 164.9 eV (S 2p 1/2 ), which correspond to unbonded S atoms in Poly(EDOT-MeSH) 57,68 (Fig. 4D).…”

Section: Resultsmentioning

confidence: 99%

“…57 In addition to the characteristic peak of Poly(EDOT-MeSH), four strong diffraction peaks for Au NPs appear at 2θ = 37.80…”

Section: Resultsmentioning

confidence: 99%

“…57 The electrochemical properties of Poly(EDOT-MeSH)/Au-modified electrode (Poly(EDOT-MeSH)/Au/GCE) were measured by CV in a 0.3 mM DA in PBS(pH = 7.0) solution, and compared with those of bare GCE and Poly(EDOT-MeSH)-modified electrode (Poly(EDOT-MeSH)/GCE) (Fig. 6A).…”

Section: Resultsmentioning

confidence: 99%

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Hollow, Spherical, Poly(3,4-ethylenedioxythiophene)-Bearing Methanethiol as a Gold Stabilizer for High-Efficiency Electrochemical Sensors

Ali¹,

Abdiryim²,

Huang³

et al. 2018

J. Electrochem. Soc.

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Conducting polymers decorated with noble metals are good electrochemical sensors for biological species. In this work, we developed a polymer of methanethiol-grafted poly(3,4-ethylenedioxythiophene) hollow spheres (Poly(EDOT-MeSH)) using SiO 2 nanospheres as a hard template. The Poly(EDOT-MeSH) spheres were used as both a reductant and stabilizer to decorate gold nanoparticles (Au NPs). FTIR, XRD, EDX, SEM and TEM analyses were used to characterize the Poly(EDOT-MeSH)/Au hollow spheres. The chemical bond between S and Au was confirmed by XPS. The electrochemical performance of the Poly(EDOT-MeSH)/Au hollow spheres was determined by cyclic voltammetry (CV) and differential pulse voltammetry (DPV). The results revealed that the Poly(EDOT-MeSH)/Au hollow sphere-based electrochemical sensor possesses an excellent conductivity and high redox reversibility with detection limits (S/N = 3) of 5.3, 0.04 and 0.12 μM in the linear ranges of 50-320 μM, 0.05 μM − 780 μM and 0.8 μM − 250 μM for the determination of AA, DA and UA, respectively. These results will further the development of this type of electrochemical sensor for biological species. Small biological species usually coexist in physiological fluids, which are very important for maintaining the functions of organisms.1,2 As typical biological species, dopamine (DA), uric acid (UA) and ascorbic acid (AA) are important components of the neural system and play significant roles in physiological functions.3,4 DA is a natural neurotransmitter that plays an important role in controlling the central nervous system and coordinating normal cardiovascular, renal, and hormonal functions. 5,6 The UA concentration in blood and urine is usually related to diseases such as Lesch-Nyhan syndrome, hyperuricemia, gout and kidney stones. 7,8 Therefore, the ability to detect and quantify these biological species is very important. Several analytical techniques, such as liquid chromatography, 9 ultraviolet visible spectroscopy, 10 capillary electrophoresis, 11,12 chemiluminescence 13,14 and spectrometry 15 have been used to detect single or multiple biological species. However, most of these techniques require specialized, expensive instruments and can be utilized only for individual determination. In the last few years, electrochemical techniques have attracted attention for the determination of multiple components due to their simplicity, low cost, minimal analysis time, high sensitivity, good selectivity and simple instrumentation. [16][17][18] However, the electrochemical oxidation of DA and UA is difficult to observe with conventional electrodes, such as glassy carbon, gold and platinum electrodes, because the oxidation products cause electrode surface fouling. 3,19 In addition, AA co-exists with DA and UA in most biological fluids, and the AA concentration is higher than that of DA and UA (100-1000 times higher than that of DA). 20 The AA oxidation peak often overlaps with the DA and UA peaks because their oxidation potentials on conventional electrodes are nearly equal. 21,22 To...

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Section: Resultsmentioning

confidence: 99%

“…57 In addition to the characteristic peak of Poly(EDOT-MeSH), four strong diffraction peaks for Au NPs appear at 2θ = 37.80…”

Section: Resultsmentioning

confidence: 99%

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Hollow, Spherical, Poly(3,4-ethylenedioxythiophene)-Bearing Methanethiol as a Gold Stabilizer for High-Efficiency Electrochemical Sensors

Ali¹,

Abdiryim²,

Huang³

et al. 2018

J. Electrochem. Soc.

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“…37,40 Firstly, graphene oxide (GO) dispersion (5 mg mL À1 ) was prepared based on the modied Hummer's method. 41 10 mL of EDT ethanol solution (5.0 mM) was mixed with 50 mL of HAuCl 4 solution (1.0 mM) under magnetic stirring at room temperature for 8 h to obtain PEDT-Au composites.…”

Section: Synthesis Of Pedt-au/rgo Nanocompositesmentioning

confidence: 99%

“…The prepared PEDT-Au composites achieved remarkable electrochemical performances, 37 since the composites possessed both the prominent electron transfer property of PEDT and distinguished conductivity of Au nanoparticles.…”

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confidence: 99%

A highly sensitive morin sensor based on PEDT–Au/rGO nanocomposites modified glassy carbon electrode

et al. 2017

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In this work, we fabricated a sensitive electrochemical sensor based on a PEDT-Au/reduced graphene oxide nanocomposites (PEDT-Au/rGO) modified glassy carbon electrode (PEDT-Au/rGO/GCE) for electrochemical determination of morin. A facile, effective and high-efficiency one-pot method was employed to synthesize the PEDT-Au/rGO nanocomposites. The morphology and structure of asprepared PEDT-Au/rGO nanocomposites were characterized by using a scanning electron microscope (SEM), transmission electron microscope (TEM) and X-ray spectroscopy (EDS), and its electrochemical characteristics were studied by EIS, CV and SWV. The PEDT-Au/rGO nanocomposites modified electrode exhibited excellent catalytic activities for morin oxidation, which was attributed to the synergistic catalytic effect that occurred at the interface of PEDT-Au and rGO layers. The effects of square wave voltammetry (SWV) parameters, accumulation time, accumulation potential and pH of the supporting electrolyte for morin were optimized. At the optimal experimental conditions, the PEDTAu/rGO/GCE presented a high sensitivity of 0.0083 mmol dm À3 and a wide linear range from 1 to 150 mmol dm À3 toward morin oxidation with satisfactory selectivity and stability.

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Achieving Ultrahigh Energy Density and Long Durability in a Flexible Rechargeable Quasi‐Solid‐State Zn–MnO₂ Battery

et al. 2017

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Advanced flexible batteries with high energy density and long cycle life are an important research target. Herein, the first paradigm of a high-performance and stable flexible rechargeable quasi-solid-state Zn-MnO battery is constructed by engineering MnO electrodes and gel electrolyte. Benefiting from a poly(3,4-ethylenedioxythiophene) (PEDOT) buffer layer and a Mn -based neutral electrolyte, the fabricated Zn-MnO @PEDOT battery presents a remarkable capacity of 366.6 mA h g and good cycling performance (83.7% after 300 cycles) in aqueous electrolyte. More importantly, when using PVA/ZnCl /MnSO gel as electrolyte, the as-fabricated quasi-solid-state Zn-MnO @PEDOT battery remains highly rechargeable, maintaining more than 77.7% of its initial capacity and nearly 100% Coulombic efficiency after 300 cycles. Moreover, this flexible quasi-solid-state Zn-MnO battery achieves an admirable energy density of 504.9 W h kg (33.95 mW h cm ), together with a peak power density of 8.6 kW kg , substantially higher than most recently reported flexible energy-storage devices. With the merits of impressive energy density and durability, this highly flexible rechargeable Zn-MnO battery opens new opportunities for powering portable and wearable electronics.

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Facile one-pot synthesis of Au–PEDOT/rGO nanocomposite for highly sensitive detection of caffeic acid in red wine sample

Cited by 96 publications

References 44 publications

Hollow, Spherical, Poly(3,4-ethylenedioxythiophene)-Bearing Methanethiol as a Gold Stabilizer for High-Efficiency Electrochemical Sensors

Hollow, Spherical, Poly(3,4-ethylenedioxythiophene)-Bearing Methanethiol as a Gold Stabilizer for High-Efficiency Electrochemical Sensors

A highly sensitive morin sensor based on PEDT–Au/rGO nanocomposites modified glassy carbon electrode

Achieving Ultrahigh Energy Density and Long Durability in a Flexible Rechargeable Quasi‐Solid‐State Zn–MnO₂ Battery

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Facile one-pot synthesis of Au–PEDOT/rGO nanocomposite for highly sensitive detection of caffeic acid in red wine sample

Cited by 96 publications

References 44 publications

Hollow, Spherical, Poly(3,4-ethylenedioxythiophene)-Bearing Methanethiol as a Gold Stabilizer for High-Efficiency Electrochemical Sensors

Hollow, Spherical, Poly(3,4-ethylenedioxythiophene)-Bearing Methanethiol as a Gold Stabilizer for High-Efficiency Electrochemical Sensors

A highly sensitive morin sensor based on PEDT–Au/rGO nanocomposites modified glassy carbon electrode

Achieving Ultrahigh Energy Density and Long Durability in a Flexible Rechargeable Quasi‐Solid‐State Zn–MnO2 Battery

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Achieving Ultrahigh Energy Density and Long Durability in a Flexible Rechargeable Quasi‐Solid‐State Zn–MnO₂ Battery