Ag-modified carbon fiber as a stable sensor

Hu, Zhihui; Xu, Jiwen; Li, Wenhao; Peng, Yedong; Zhou, Wei; Zhao, Ling; Wang, Qing

doi:10.1016/j.compositesa.2020.106034

Cited by 8 publications

(3 citation statements)

References 47 publications

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“…Hydrophilic property test of materials.-The hydrophilicity and hydrophobicity of the fiber surface will affect the electron transfer of its electrochemical reaction. 52 Therefore, the material needs to have appropriate surface wettability to maintain good contact with the reactants. Different concentration of growth solutions was used to prepare ZnO/CF materials.…”

Section: Discussion Of Resultsmentioning

confidence: 99%

Convenient and Accurate Detection of Dopamine and Glucose by Modifying Carbon Fiber Electrodes

Han,

Zhang,

et al. 2024

ECS J. Solid State Sci. Technol.

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Fast, sensitive, and low-cost high-performance detectors have gradually become an indispensable tool for people to keep healthy, and sensors are the key devices of detection equipment. In this work, a ZnO nanocrystal modified carbon fiber electrode was prepared using a hydrothermal method, and on this basis, a galvanostatic point deposition method was used to load copper nanoparticles to prepare a sensor electrode. Scanning electron microscopy and X-ray diffraction were used to comprehensively analyze composition, morphology, and environmental adaptability of the prepared electrodes. The DPV test was used to verify the enhanced effect of ZnO nanorods on neurotransmitter detection. The ZnO/CF showed an obvious electrical signal (0.22 V, 4×10-5A) in the detection of dopamine (DA) solution, and the Cu-NPs/ZnO/CF also showed excellent detection results in the glucose detection experiment., providing two excellent examples for the development of low-cost electrochemical sensors. The electrodes can specifically detect DA in the presence of ascorbic acid and uric acid, and the detection limit of the electrode for detecting DA is about 0.4 μM. In addition, the Cu-NPs/ZnO/CF electrode successfully realized the enzyme-free detection of glucose, and the detection limit could reach 0.5 μM.

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Section: Discussion Of Resultsmentioning

confidence: 99%

Convenient and Accurate Detection of Dopamine and Glucose by Modifying Carbon Fiber Electrodes

Han,

Zhang,

et al. 2024

ECS J. Solid State Sci. Technol.

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“…The pretreatment process of untreated CFs is similar to our previous work, which is briefly described as follows. , Initially, the untreated CFs were soaked in acetone for 24 h, and then ultrasonic was applied in acetone, ethanol, and DI water for 30 min separately to remove surface impurities. Second, the CFs were heated from room temperature (RT) to 400 °C at a heating rate of 3 °C·min –1 for TOP for the purpose of increasing the specific surface area and oxygen-containing functional groups of CFs.…”

Section: Methodsmentioning

confidence: 99%

Controllable 3D Flower-Like Ag-CF Electrodes as Flexible Marine Electric Field Sensors with High Stability

et al. 2023

Inorg. Chem.

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Construction of three-dimensional (3D) flower-like nanostructures with controlled morphologies has emerged as an attractive tool by scientists in the marine electric field sensor research field due to their peculiar structural features. Herein, novel 3D flower-like Ag-CF capacitive composite electrodes have been created by an eco-friendly water-bath strategy via AgNO3 as a sliver source and subsequently compounded with carbon fibers (CFs) pretreated by thermal oxidation. A series of electrode samples with various morphologies obtained by modulating different reaction times and temperatures bring about the dominant formation mechanism of these nanostructures and the influence behavior on the CF electrode in detail. Especially, the 3D flower-like Ag-CF electrode shows a large surface area acquired under the conditions of 80 °C and 15 min, which can provide more electroactive sites in electrochemical analysis and exhibit a maximum areal specific capacitance of 619.75 mF·cm–2 at a scanning speed of 10 mV·s–1. This is mainly due to the synergistic behavior of the unique 3D flower-like morphology and the large specific surface area of CFs. Furthermore, a cylinder-shaped Ag-CF sensor is designed, which delivers a superior potential difference of 33.08 μV, a potential difference drift of 18.62 μV/24 h for 30 days, and a self-noise of 0.92 nV/rt (Hz)@1 Hz. In this work, the intriguing synthesis strategy can be a promising facile approach to manufacture the controllable 3D flower-like Ag-CF electrode for electric field sensor applications.

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“…The fabrication process of the Ag-rGO-CF electrode included two main steps: thermal oxidation and hydrothermal growth. Thermal oxidation is similar to our previous work, 44 as follows: First, bare CFs purchased from Toray Japan were soaked in acetone for at least 24 h. Subsequently, acetone, ethanol, and DI water were used separately for 30 min of ultrasonic cleaning to fully remove impurities from CFs. The dried CFs were heated to 400 °C at a heating rate of 3 °C/min and then kept for 1 h. The purpose of the thermal oxidation step is to increase the specific surface area of the CFs and at the same time introduce oxygencontaining functional groups.…”

Section: Materials For Preparing Ag-rgo-cf Electrodesmentioning

confidence: 99%

Ag/Reduced Graphene Oxide/Carbon Fiber Composites as Electrodes for Highly Stable and Responsive Marine Electric Field Sensors

Sun

et al. 2023

ACS Appl. Nano Mater.

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The increasing demand for maintenance-free, costeffective, and high-stability flexible electrodes is highly anticipated for the research of marine electric-field sensors, and various carbon fibers (CFs) are considered the most suitable carbon-based electrode for the purpose. Nevertheless, the conventional fabrication of acidified or nitrogenized CF electrodes did not attract great attention for commercial application, which has limitations in the case of simultaneous cost-effectiveness and longterm stability. In this study, with homemade reduced graphene oxide (rGO) load, the prepared double carbon substrate Ag-rGO-CF composite electrodes have a honeycomb rGO conductive skeleton and the dispersed Ag nanoparticles via a facile hermetic oxidation process and hydrothermal method. The prepared Ag-rGO-CF composite electrode demonstrated an outstanding electrode performance, including low resistance, high electrochemical reaction rate, and stable potential with long-term stability and low cost. The electric double-layer (EDL) structure theory from the Gouy−Chapman−Stern model and double carbon substrate mechanism between CFs and rGO with the help of Ag were clarified, whose principle is to strengthen the adsorption force and electrostatic attraction of the electrode and to offset the residual charge while reducing the thickness of the electric double layer to achieve the purpose of potential balance. The Ag-rGO-CF composite electrode has presented long-term stability and high sensitivity, especially a wide application bandwidth. The Ag-rGO-CF composite electrode made in this study is a competitive candidate material as a flexible marine electrode field sensor.

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Ag-modified carbon fiber as a stable sensor

Cited by 8 publications

References 47 publications

Convenient and Accurate Detection of Dopamine and Glucose by Modifying Carbon Fiber Electrodes

Convenient and Accurate Detection of Dopamine and Glucose by Modifying Carbon Fiber Electrodes

Controllable 3D Flower-Like Ag-CF Electrodes as Flexible Marine Electric Field Sensors with High Stability

Ag/Reduced Graphene Oxide/Carbon Fiber Composites as Electrodes for Highly Stable and Responsive Marine Electric Field Sensors

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