Aqueous hybrid nanofluids containing silver-reduced graphene oxide for improving thermo-physical properties

Vărdaru, Alexandru; Huminic, Gabriela; Huminic, Angel; Fleaca, C.; Dumitrache, Florian; Morjan, I.

doi:10.1016/j.diamond.2023.109688

Cited by 11 publications

(1 citation statement)

References 33 publications

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“…The results indicate that the Ag@rGO nanocomposite can be used as an excellent electrode material for detecting L-cysteine, which can be attributed to the large surface area, rich active sites, high conductivity of silver, and excellent catalytic activity of rGO. In addition, in a 40 mL phosphate-buffered solution (pH = 7.0), the Zeta potential of Ag GO nanocomposite was measured to be −16.5 mV, indicating that Ag-supported graphene nanomaterials have excellent stability [53], promoting the collision and binding of Lcysteine with quantum dots on the material [38] and undergoing rapid oxidation reactions under the catalysis of Ag nanoparticles. To demonstrate the selectivity of the Ag@rGO/GCE sensor, the potential interferences of some typical organic compounds for the detection of L-cysteine were also investigated using the amperometric method.…”

Section: Amperometric Detection Of L-cysteine At Ag@rgo/gcementioning

confidence: 99%

Spherical Silver Nanoparticles Located on Reduced Graphene Oxide Nanocomposites as Sensitive Electrochemical Sensors for Detection of L-Cysteine

Hua,

Yao,

Yao

2024

Sensors

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A new, simple, and effective one-step reduction method was applied to prepare a nanocomposite with spherical polycrystalline silver nanoparticles attached to the surface of reduced graphene oxide (Ag@rGO) at room temperature. Equipment such as X-ray diffraction (XRD), scanning electron microscopy (SEM), transmission electron microscopy (TEM), X-ray photoelectron spectroscopy (XPS), and Fourier transform infrared spectroscopy (FTIR) was used to characterize the morphology and composition of the Ag@rGO nanocomposite. A novel electrochemical sensor for detecting L-cysteine was proposed based on fixing Ag@rGO onto a glassy carbon electrode. The electrocatalytic behavior of the sensor was studied via cyclic voltammetry and amperometry. The results indicate that due to the synergistic effect of graphene with a large surface area, abundant active sites, and silver nanoparticles with good conductivity and high catalytic activity, Ag@rGO nanocomposites exhibit significant electrocatalytic activity toward L-cysteine. Under optimal conditions, the constructed Ag@rGO electrochemical sensor has a wide detection range of 0.1–470 μM for L-cysteine, low detection limit of 0.057 μM, and high sensitivity of 215.36 nA M−1 cm−2. In addition, the modified electrode exhibits good anti-interference, reproducibility, and stability.

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Section: Amperometric Detection Of L-cysteine At Ag@rgo/gcementioning

confidence: 99%