Highly stable electrochemical sensing platform for the selective determination of pefloxacin in food samples based on a molecularly imprinted-polymer-coated gold nanoparticle/black phosphorus nanocomposite

Food Chemistry, Journal Year: 2023, Volume and Issue: 436, P. 137753 - 137753

Published: Oct. 15, 2023

Language: Английский

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UiO-66/Carboxylated Multiwalled Carbon Nanotube Composites for Highly Efficient and Stable Voltammetric Sensors for Gatifloxacin

ACS Applied Nano Materials, Journal Year: 2023, Volume and Issue: 6(20), P. 19403 - 19413

Published: Oct. 12, 2023

The excessive use of gatifloxacin (GAT) can seriously pollute the environment and damage human health. Therefore, reliable detection its concentration is essential for environmental protection physical Herein, an efficient stable voltammetric sensor based on zirconium-based metal–organic framework/carboxylated multiwalled nanotube nanocomposites (UiO-66/MWCNT-COOH) was constructed determination GAT. morphologies, microstructures, electrochemical properties UiO-66/MWCNT-COOH were investigated by using various microscopic, spectroscopic, techniques. showed good electrocatalytic activity GAT oxidation with remarkable response signals, which primarily attributed to synergistic effect from UiO-66 MWCNT-COOH. Electrochemical kinetics studies revealed that irreversible diffusion-limited reaction involving two protons electrons. anodic peak current linearly correlated in range 0.05 10 μM a low limit 0.0075 μM. Moreover, demonstrated high selectivity, reproducibility, repeatability as well extraordinary long-term stability (at least 7 weeks). proposed reliably detected trace effluent, milk, serum, eye drops satisfactory recoveries. Together outstanding merits such cost, robust response, short assay time, sensitivity, shows enormous prospects situ multiple antibiotics.

Language: Английский

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Dual-Modulation ratiometric fluorescence strategy for cobalt and topotecan detection using Red-Emissive carbon dots

Microchemical Journal, Journal Year: 2024, Volume and Issue: 201, P. 110645 - 110645

Published: April 27, 2024

Language: Английский

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Recent advances on metal-organic framework-based electrochemical sensors for determination of organic small molecules

Talanta, Journal Year: 2024, Volume and Issue: 280, P. 126744 - 126744

Published: Aug. 25, 2024

Language: Английский

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Materials and design strategies for the electrochemical detection of antineoplastic drugs: Progress and perspectives

Materials Science and Engineering R Reports, Journal Year: 2024, Volume and Issue: 161, P. 100840 - 100840

Published: Sept. 2, 2024

Language: Английский

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Metal-organic frameworks/metal nanoparticles as smart nanosensing interfaces for electrochemical sensors applications: a mini-review

Frontiers in Bioengineering and Biotechnology, Journal Year: 2023, Volume and Issue: 11

Published: Aug. 8, 2023

Metal-organic frameworks (MOFs) are porous materials with huge specific surface area and abundant active sites, which composed of metal ions or clusters organic ligands in the form coordination bonds. In recent years, MOFs have been successfully applied many fields due to their excellent physical, chemical, biological properties. Electrochemical sensors advantages such as economy, portability, sensitivity, making them increasingly valued field sensors. Many studies shown that electrode will affect performance electrochemical Therefore, research on is still one hotspots. also commonly used construct However, prepared from single shortcomings insufficient conductivity, low poor catalytic ability. order compensate for these defects, a new type nanocomposite material very ideal conductivity was formed by adding nanoparticles (MNPs) MOFs. The combination two expected be widely This review summarizes applications various MNPs/MOFs composites provides some references development composites-based future.

Language: Английский

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Determination of vanillin in different food samples by using SMM/Au@ZIF-67 electrochemical sensor

Scientific Reports, Journal Year: 2023, Volume and Issue: 13(1)

Published: Oct. 20, 2023

Abstract Vanillin is a popular flavoring agent in many food products. Simple, fast, and reliable quantification of this compound crucial for the industry. In work, we have developed new electrochemical sensor accurate detection vanillin various real samples. The composite electrode was made sodium montmorillonite nanoclay (SMM) gold nanoparticles modified ZIF-67 (Au@ZIF-67), which SMM contributes to large adsorption capacity analyte, supply more sensing active sites, provide high electrical conductivity. comprehensively characterized using Brunauer–Emmett–Teller, EDS, XRD, SEM, FTIR, TEM, its behavior determination including electrooxidation mechanism different parameters such as scan rate pH value investigated. result revealed that two electron-two proton process involved vanillin, takes place readily due lower potential on surface SMM/Au@ZIF-67/carbon paste electrode. also sensitive with an anodic peak current almost 2.6 times than bare A linear concentration range established between 1 1200 nM limit 0. 3 quantitation nM. For samples, demonstrated excellent recovery rates reliability comparable standard high-performance liquid chromatography method.

Language: Английский

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The state-of-the-art of molecularly imprinted polymers based electrochemical sensors and their applications in drug assay

Coordination Chemistry Reviews, Journal Year: 2024, Volume and Issue: 526, P. 216384 - 216384

Published: Dec. 4, 2024

Language: Английский

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Development of a Simple and Selective Method for Nicotinamide Determination in Human Plasma Samples by Magnetic Molecularly Imprinted Solid‐Phase Extraction Combined With UV–Visible Spectrophotometry

Separation Science Plus, Journal Year: 2025, Volume and Issue: 8(4)

Published: April 1, 2025

ABSTRACT A new method utilizing magnetic molecularly imprinted solid‐phase extraction (SPE) with ultraviolet–visible (UV–vis) spectrophotometry was developed to selectively extract, preconcentrate, and detect nicotinamide (NAM) in human plasma samples. To adsorb NAM, novel polymers (Fe 3 O 4 @MIPs) were synthesized. The as‐prepared Fe @MIPs exhibited a uniform core–shell structure polymer layer thickness of approximately 20 nm. susceptibility 7.7 emu/g, which can meet the need for rapid separation. had an adsorption capacity 411.8 mg/g, 232.7 mg/g larger than that @NIPs. Moreover, achieve equilibrium within 15 min exhibit good selectivity NAM. On basis above results, chosen as SPE adsorbent extract NAM from samples under optimal experimental conditions, followed by concentration analysis using UV–vis spectrophotometer. validation experiment demonstrated proposed broad linear range (50 ng/mL 30 µg/mL), low detection limit (8.2 ng/mL), recovery (92.8%–103.2%). Besides, remained 85.2% even after five adsorption–desorption cycles. These results indicate method, its simplicity, rapidness, cost provides potential prospect accurate targets complicated

Language: Английский

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Electro-oxidation sensing of sumatriptan in aqueous solutions and human blood serum by Zn(II)-MOF modified electrochemical delaminated pencil graphite electrode

Scientific Reports, Journal Year: 2023, Volume and Issue: 13(1)

Published: Oct. 5, 2023

Abstract An electrochemical sensory platform is presented for determination of sumatriptan (SUM) in aqueous solutions and human blood serum. A pencil graphite electrode (PGE) was electrochemically delaminated by cyclic voltammetry technique, then further modified using nanoparticles a zinc-based metal–organic framework (Zn(II)-MOF). The fabricated Zn(II)-MOF/EDPGE utilized sensitive detection SUM via an electro-oxidation reaction. Zn(II)-MOF hydrothermally synthesized characterized various techniques. delamination PGE results porous substrate, facilitating the effective immobilization modifier. designed sensor benefits from both enhanced surface area accelerated electron transfer rate, as evidenced chronocoulogram Nyquist plots. Under optimized conditions, developed exhibited linear response 0.99–9.52 µM solutions. short time 5 s observed limit found to be 0.29 μM. Selectivity towards evaluated examining interference effect codeine, epinephrine, acetaminophen, ascorbic acid, uric which are commonly biological samples. shows excellent performance with recovery values falling within range 96.6 111% analysis serum

Language: Английский

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