Synthesis of Trilaminar Core–Shell Au/α-Fe2O3@SnO2Nanocomposites and their Application for Nonenzymatic Dopamine Electrochemical Sensing

Zhang, Xinjin; Yue, Shi‐Jun; Li, Jiajia; Zheng, Jianbin; Gao, Guo-Jie

doi:10.1142/s1793292019501388

Cited by 3 publications

(1 citation statement)

References 43 publications

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“…to improve electrical conductivity. [24][25][26][27] This study describes the two-step hydrothermal synthesis of the binary core-branch nanocomposite carbon microspheres@α-Fe2O3 with well-defined morphology and synergistic effects of combined composition. With the intention of controlling the growth and enhancing the electrochemical sensor activity of α-Fe2O3, carbon microspheres can be employed as a core.…”

Section: Introductionmentioning

confidence: 99%

Synthesis of hierarchical binary core‐branch nanocomposite of carbon microspheres@α‐Fe₂O₃ for enhancing electrochemical behavior

Hai,

Anh,

et al. 2023

Vietnam Journal of Chemistry

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A facial strategy for the synthesis of hierarchical binary core‐branch carbon microspheres (CMS)@α‐Fe2O3 is presented. X‐ray diffraction (XRD), Fourier transform infrared spectroscopy (FT‐IR), energy‐dispersive X‐ray spectroscopy (EDX), scanning electron microscopy (SEM), transmission electron microscopy (TEM), high‐resolution TEM (HR‐TEM), and Brunauer–Emmett–Teller (BET) were used to characterize the structural and morphological properties of the products. XRD diffraction analysis of CMS@α‐Fe2O3 reveals the highly crystalline nature of α‐Fe2O3 in the hierarchical binary core‐branch CMS@α‐Fe2O3 nanocomposite. Morphological analyses show that the α‐Fe2O3 shell layer grew onto the surface of CMS to form nanoscale heterointerfaces in the core‐branch structure, demonstrating the effectiveness of the synthesized route. More importantly, CMS@α‐Fe2O3 demonstrated superior electrochemical behavior to CMS. The enhanced CMS@α‐Fe2O3 electrochemical performance can be attributed to its large specific surface area, which allows for the rapid transfer of electrons into the electrode during the redox process.

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Section: Introductionmentioning

confidence: 99%

Synthesis of hierarchical binary core‐branch nanocomposite of carbon microspheres@α‐Fe₂O₃ for enhancing electrochemical behavior

Hai,

Anh,

et al. 2023

Vietnam Journal of Chemistry

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Dielectric properties, polarization process, and charge transport in granular (FeCoZr)x(Pb(ZrTi)O3)(100−x) nanocomposites near the percolation threshold

2022

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This paper presents the research of dielectric properties of (FeCoZr)x(Pb(ZrTi)O3)(100−x) granular metal–dielectric nanocomposites below the percolation threshold. Tested materials have been prepared by using the ion beam sputtering technique in the atmosphere of argon and oxygen. The impedance spectroscopy method has been used to investigate the polarization processes and dielectric relaxation mechanism in the granular nanocomposites. AC measurements in the frequency region of 50 Hz to 1 MHz and measuring temperature range of 81–293 K have been performed. Interfacial, in the low frequency region, and dipolar, in intermediate and high frequency regions, types of polarization processes were observed. The interfacial relaxation process testifies to charge accumulation at the interfaces (grain boundaries) between conductive nanoparticles surrounding an insulative matrix, as well as the space charge region around the contact area between the measurement probes and tested sample. Dipolar polarization corresponds to electric dipole formation after applying to the material an external electric field. The conduction mechanism in the tested material is considered to be hopping carrier exchange and takes place between metallic phase nanograins. It corresponds to the exponential frequency dependence of conductivity. The relaxation mechanism in the (FeCoZr)x(Pb(ZrTi)O3)(100−x) layer has been estimated as a near-Debye process with relaxation time distribution. The nanocomposite exhibits dielectric type and capacitive characteristics in the whole measuring frequency range.

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Electrochemical Synthesis of Nickel–Copper Alloy Nanocomposite to Fabricate an Electrochemical Sensor for Uric Acid

Zheng

Pei

Feng

et al. 2020

NANO

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In this work, a sensor for quantitative detection of uric acid (UA) is successfully prepared by electrodepositing Nickel–Copper (Ni–Cu) alloy nanoparticles on poly (3,4-ethyldioxythiophene) modified nitrogen-containing grapheme (Ni–Cu/PEDOT/NGE). The anchoring of PEDOT and Cu–Ni alloy nanoparticles on NGE not only prevents the agglomeration of NGE, but also improves the catalytic activity of the composites. Ni–Cu/PEDOT/NGE shows high electrochemical performance to UA and the oxidation of UA on its interface was an action with two protons and two electrons. Under the optimized condition, the response current of the sensor is linear with UA concentration within the range of 0.1–10[Formula: see text][Formula: see text]M and 10–50[Formula: see text][Formula: see text]M. A low detection limit of 0.059[Formula: see text][Formula: see text]M at S/[Formula: see text] is obtained. Additionally, the fabricated electrochemical sensor with good sensitivity and selectivity to UA may be promising for practical clinical testing.

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Synthesis of Trilaminar Core–Shell Au/α-Fe₂O₃@SnO₂Nanocomposites and their Application for Nonenzymatic Dopamine Electrochemical Sensing

Cited by 3 publications

References 43 publications

Synthesis of hierarchical binary core‐branch nanocomposite of carbon microspheres@α‐Fe₂O₃ for enhancing electrochemical behavior

Synthesis of hierarchical binary core‐branch nanocomposite of carbon microspheres@α‐Fe₂O₃ for enhancing electrochemical behavior

Dielectric properties, polarization process, and charge transport in granular (FeCoZr)x(Pb(ZrTi)O3)(100−x) nanocomposites near the percolation threshold

Electrochemical Synthesis of Nickel–Copper Alloy Nanocomposite to Fabricate an Electrochemical Sensor for Uric Acid

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Synthesis of Trilaminar Core–Shell Au/α-Fe2O3@SnO2Nanocomposites and their Application for Nonenzymatic Dopamine Electrochemical Sensing

Cited by 3 publications

References 43 publications

Synthesis of hierarchical binary core‐branch nanocomposite of carbon microspheres@α‐Fe2O3 for enhancing electrochemical behavior

Synthesis of hierarchical binary core‐branch nanocomposite of carbon microspheres@α‐Fe2O3 for enhancing electrochemical behavior

Dielectric properties, polarization process, and charge transport in granular (FeCoZr)x(Pb(ZrTi)O3)(100−x) nanocomposites near the percolation threshold

Electrochemical Synthesis of Nickel–Copper Alloy Nanocomposite to Fabricate an Electrochemical Sensor for Uric Acid

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Synthesis of Trilaminar Core–Shell Au/α-Fe₂O₃@SnO₂Nanocomposites and their Application for Nonenzymatic Dopamine Electrochemical Sensing

Synthesis of hierarchical binary core‐branch nanocomposite of carbon microspheres@α‐Fe₂O₃ for enhancing electrochemical behavior

Synthesis of hierarchical binary core‐branch nanocomposite of carbon microspheres@α‐Fe₂O₃ for enhancing electrochemical behavior