Analytical Letters, Год журнала: 2024, Номер unknown, С. 1 - 16
Опубликована: Июнь 19, 2024
Язык: Английский
ACS Omega, Год журнала: 2024, Номер 9(2), С. 2896 - 2910
Опубликована: Янв. 2, 2024
Herein, a nonenzymatic detection of paraoxon-ethyl was developed by modifying glassy carbon electrode (GCE) with gold–silver core–shell (Au–Ag) nanoparticles combined the composite graphene poly(3,4-ethylenedioxythiophene)/poly(styrenesulfonate) (PEDOT:PSS). These were synthesized using seed-growth method and characterized UV–vis spectroscopy high-resolution transmission electron microscopy (HR-TEM) techniques. Meanwhile, structural properties, surface morphology topography, electrochemical characterization Au–Ag core–shell/graphene/PEDOT:PSS analyzed infrared spectroscopy, field emission scanning (FE-SEM), atomic force (AFM), impedance (EIS) Moreover, proposed sensor for based on modified GCE demonstrates good electroanalytical performance when investigated cyclic voltammetry (CV), differential pulse (DPV), chronoamperometry It found that synergistic effect between graphene/PEDOT:PSS provides higher conductivity enhanced electrocatalytic activity at an optimum pH 7. At 7, shows linear range concentrations from 0.2 to 100 μM limit 10 nM high sensitivity 3.24 μA μM–1 cm–2. In addition, confirmed reproducibility, possibility being further as disposable electrode. This also displayed selectivity in presence several interfering species such diazinon, carbaryl, ascorbic acid, glucose, nitrite, sodium bicarbonate, magnesium sulfate. For practical applications, this employed determination real samples (fruits vegetables) showed no significant difference standard spectrophotometric technique. conclusion, might have potential be platform sensors pesticide detection.
Язык: Английский
Процитировано
15
Microchimica Acta, Год журнала: 2024, Номер 191(1)
Опубликована: Янв. 1, 2024
Abstract A novel cobalt-doped two-dimensional molybdenum diselenide/polypyrrole hybrid-based carbon nanofiber (Co/MoSe 2 /PPy@CNF) was prepared using the hydrothermal method followed by electrospinning technique. The structural and morphological properties of 2D-TMD@CNF-based hybrids were characterized through X-ray photoelectron spectroscopy (XPS), scanning electron microscopy (SEM), energy-dispersive spectrometry (EDS), transmission (TEM). Co-MoSe /PPy@CNF exhibited large surface area, porous structure, improved active sites due to synergistic effect components. electrochemical electrocatalytic characteristics 2D-TMD@CNF-modified electrodes also investigated cyclic voltammetry (CV) differential pulse (DPV) techniques. Co/MoSe electrode used as an sensor for simultaneous detection ascorbic acid (AA), dopamine (DA), uric (UA) showed enhanced catalytic activity sensitivity. Using DPV measurements, demonstrated wide linear ranges 30–3212 μM AA, 1.2–536 DA, 10–1071 UA with low limits 6.32, 0.45, 0.81 μM, respectively. developed /PPy@CNF-modified applied a human urine sample gave recoveries ranging from 94.0 105.5% ( n = 3) UA. Furthermore, /PPy@CNF-based good selectivity reproducibility Graphical abstract
Язык: Английский
Процитировано
13
Talanta, Год журнала: 2024, Номер 282, С. 127038 - 127038
Опубликована: Окт. 11, 2024
Язык: Английский
Процитировано
7
Molecules, Год журнала: 2024, Номер 29(3), С. 744 - 744
Опубликована: Фев. 5, 2024
In this paper, a highly conductive alkali-activated graphitized carbon (a-GC) was prepared using tilapia fish scales as precursors through enzymolysis, activation and pyrolytic carbonization methods. The a-GC modified on the surface of screen-printed electrode to construct flexible portable electrochemical sensing platform, which applied differential pulse voltametric detection dopamine (DA) U-disk workstation combined with smart phone Bluetooth. possesses good electrical conductivity, large specific area abundant active sites, are beneficial for electrooxidation DA molecules result in excellent sensitivity high selectivity analysis. Under optimal conditions, oxidation peak current increased gradually, its concentrations range from 1.0 μmol/L 1000.0 μmol/L, limit low 0.25 (3S/N). proposed sensor further determination human sweat samples, satisfactory results, provided an opportunity developing noninvasive early diagnosis nursing equipment.
Язык: Английский
Процитировано
4
Materials Science and Engineering B, Год журнала: 2025, Номер 318, С. 118306 - 118306
Опубликована: Апрель 9, 2025
Процитировано
0
Materials Science and Engineering B, Год журнала: 2025, Номер 319, С. 118346 - 118346
Опубликована: Апрель 24, 2025
Язык: Английский
Процитировано
0
Microchemical Journal, Год журнала: 2025, Номер unknown, С. 114024 - 114024
Опубликована: Май 1, 2025
Язык: Английский
Процитировано
0
Analytical Methods, Год журнала: 2024, Номер 16(16), С. 2496 - 2504
Опубликована: Янв. 1, 2024
This work describes an electrochemical sensor for the fast noninvasive detection of uric acid (UA) in saliva. The sensing material was based on a cobalt-containing Prussian blue analogue (Na2-xCo[Fe(CN)6]1-y, PCF). By optimizing ratio Co and Fe as 1.5 : 1 PCF (PCF1.5,0), particles with regular nanocubic morphology were formed. calcination PCF1.5,0 produced carbon-coated CoFe alloy (CCF1.5), which possessed abundant defects achieved excellent performance. Subsequently, CCF1.5 modified screen-printed carbon electrode (SPCE) to fabricate sensor, CCF1.5/SPCE, showed sensitive selective response toward salivary UA owing its good conductivity, sufficient surface active sites efficient catalytic activity. determination artificial saliva wide linear range 40 nM-30 μM low limit (LOD) 15.3 nM (3σ/s 3). performances including reproducibility, stability selectivity estimated be satisfactory. content human determined recovery 98-107% total RSD 4.14%. results confirmed reliability CCF1.5/SPCE application detection.
Язык: Английский
Процитировано
1
Analytical Letters, Год журнала: 2024, Номер unknown, С. 1 - 16
Опубликована: Июнь 19, 2024
Язык: Английский
Процитировано
0