Study on anticorrosion of Q235 building steel using Iranian rock-graphene nanocomposite coating

Jiang, Bolin; Wu, Minxian; Wu, Shanshan; Ji, Min

doi:10.1016/j.aej.2023.03.033

Cited by 5 publications

(1 citation statement)

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“…Recent advances in nanotechnology have stimulated interest in utilizing nanomaterials for enhancing the performance of electrochemical sensors. The excellent conductivity, high surface area and catalytic properties of nanomaterials can improve electron transfer kinetics and sensitivity [ 24 ]. Cellulose is an abundant biopolymer that has been widely researched for developing functional nanocomposites using metal nanoparticles as nanofillers [ 25 , 26 ].…”

Section: Introductionmentioning

confidence: 99%

Silver Nanoparticle-Embedded Hydrogels for Electrochemical Sensing of Sulfamethoxazole Residues in Meat

Deng,

Yang

2024

Molecules

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A disposable electrochemical sensor based on silver nanoparticle-embedded cellulose hydrogel composites was developed for sensitive detection of sulfamethoxazole residues in meat samples. Scanning electron microscopy confirmed the porous structure of the cellulose matrix anchored with 20–50 nm silver nanoparticles (AgNPs). Fourier transform infrared spectroscopy and X-ray diffraction verified that the metallic AgNPs coordinated with the amorphous cellulose chains. At an optimum 0.5% loading, the nanocomposite sensor showed a peak-to-peak separation of 150 mV, diffusion-controlled charge transfer kinetics, and an electron transfer coefficient of 0.6 using a ferro/ferricyanide redox probe. Square-wave voltammetry was applied for sensing sulfamethoxazole based on its two-electron oxidation peak at 0.72 V vs. Ag/AgCl in Britton–Robinson buffer of pH 7.0. A linear detection range of 0.1–100 μM sulfamethoxazole was obtained with a sensitivity of 0.752 μA/μM and limit of detection of 0.04 μM. Successful recovery between 86 and 92% and less than 6% RSD was achieved from spiked meat samples. The key benefits of the proposed disposable sensor include facile fabrication, an antifouling surface, and a reliable quantification ability, meeting regulatory limits. This research demonstrates the potential of novel cellulose–silver nanocomposite materials towards developing rapid, low-cost electroanalytical devices for decentralized on-site screening of veterinary drug residues to ensure food safety.

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Section: Introductionmentioning

confidence: 99%