Portable electrochemical sensor for adrenaline detection using CoNi-MOF-based CS-PAM hydrogel

Journal of Colloid and Interface Science, Journal Year: 2024, Volume and Issue: 671, P. 423 - 433

Published: May 25, 2024

Language: Английский

---

Development of eco-friendly and cost-effective electrochemical sensor for the simultaneous detection of 4-aminophenol and paracetamol in water

Sensing and Bio-Sensing Research, Journal Year: 2025, Volume and Issue: unknown, P. 100782 - 100782

Published: April 1, 2025

Language: Английский

---

Electrochemical Sensing of Acetaminophen Based on CuO/CNTs/g-C₃N₄ Composite

Journal of The Electrochemical Society, Journal Year: 2025, Volume and Issue: 172(4), P. 047521 - 047521

Published: April 1, 2025

This study investigates the application of a copper oxide/carbon nanotubes/carbon nitride(CuO/CNTs/g-C 3 N 4 ) composite as electrode material for acetaminophen detection. The synthesized nanomaterials were characterized using scanning electron microscopy, transmission energy-dispersive spectroscopy, and powder X-ray diffraction. electrochemical behavior was assessed via cyclic voltammetry square wave volammetry methods. synergistic effects CuO, g-C CNTs enhance transfer, facilitating conversion irreversible oxidation processes into reversible redox events. CuO/CNTs/g-C sensing exhibited significantly stronger peak signal, reflecting improved catalytic performance sensor demonstrated linear detection range 0.02–0.1 1–120 μmol l −1 , with limit 5.89 nmol . results affirm that provides robust reproducibility stability determination acetaminophen.

Language: Английский

---

Portable Electroanalytical Platform Based on Eco-Friendly Biomass-Based Hydrogels with Bimetallic MOF Composites for Trace Acetaminophen Determination

ACS Biomaterials Science & Engineering, Journal Year: 2024, Volume and Issue: 11(1), P. 649 - 660

Published: Dec. 18, 2024

Accurate acetaminophen (APAP) determination using smartphone-based portable sensing hinges on developing interfaces with effective catalytic performance and high electron transfer efficiency. Herein, we report that various Ni-based bimetallic-organic framework materials (MOFs) were synthesized through the hydrothermal method. These MOFs incorporated multiwalled carbon nanotubes (MWCNTs) during synthesis of chitosan-cationic guar gum hydrogels (HG). The resulting composite conductive hydrogel features a distinctive three-dimensional network structure large specific surface area, enhancing APAP enrichment electrocatalytic activity. Among them, CuNi-MOF-based (CHG/CuNi-MOF) has most desirable capability as signal amplifier. Under optimal conditions, sensor constructed screen-printed electrode (SPE) CHG/CuNi-MOF (CHG/CuNi-MOF/SPE) wide detection range (0.07–1500 μM), low limit (0.023 relatively sensitivity (0.0450 μA·μM–1·cm–2) for determination. In addition, CHG/CuNi-MOF/SPE good stability, repeatability anti-interference properties, which make it possible to achieve selective targets in complex analysis ultimately obtain satisfactory recoveries (97.6–104.2%). This work successfully proves feasibility application MOFs-based electrochemical phenolics actual samples.

Language: Английский

---

Synergism in the electrocatalytic properties of cobalt phthalocyanine-carbon nanotube-polymeric electrospun nanofibers immobilized on a gold electrode for the detection of lead(II) ions

Materials Chemistry and Physics, Journal Year: 2024, Volume and Issue: 325, P. 129730 - 129730

Published: Aug. 2, 2024

Core-shelled electrospun nanofibers (ENFs) comprising of a polyvinyl acetate (PVA) shell encapsulating composite polyaniline (PANI), tetra-4-(3-oxyflavonephthalocyaninato)cobalt(II) (CoPc-flav), carboxylic acid functionalized multiwalled carbon nanotubes (f-MWCNTs) and an annealed conductive top layer Nafion (Nf) were used to fabricated chemically modified gold electrode (Au|ENFs-1-Nf) via the adsorption method. The electrocatalytic sensing capabilities Au|ENFs-1-Nf towards Pb(II) ions evaluated. In comparison bare other electrodes (CMEs), was less prone fouling showing more stable analyte signal compromised background electrolyte currents. could detect cations in reproducible manner ranging from 8 125 μM where limits detection quantification 0.51 1.55 obtained, respectively. analytical performance aforementioned CME rendered comparable percentage recovery (103 %) with that Inductively coupled plasma-optical emission spectroscopy (ICP-OES) (115 %).

Language: Английский

---

Application of Electrospun Nanofiber-Based Electrochemical Sensors in Food Safety

Molecules, Journal Year: 2024, Volume and Issue: 29(18), P. 4412 - 4412

Published: Sept. 17, 2024

Food safety significantly impacts public health and social welfare. Recently, issues such as heavy metal ions, drug residues, food additives, microbial contamination in have become increasingly prominent. Electrochemical sensing technology, known for its low cost, simplicity, rapid response, high sensitivity, excellent selectivity, has been crucial detection. Electrospun nanofibers, with their specific surface area, superior mechanical properties, design flexibility, offer new insights technical platforms developing electrochemical sensors. This study introduces the fundamental principles, classifications, detection mechanisms of sensors, along principles classifications electrospinning technology. The applications electrospun nanofiber-based sensors over past five years are detailed, limitations future research prospects discussed. Continuous innovation optimization expected to make a key technology detection, providing valuable references expanding application advancing methods.

Language: Английский

---

Metallophthalocyanine-based electrochemical sensors for accurate qualitative and quantitative analysis of emerging pollutants in water resources.

Published: Jan. 1, 2024

Water is a precious resource and safeguarding it from pollution paramount to ensure the well-being of both environment human health. Emerging contaminants such as pharmaceuticals heavy metals pose significant threats, necessitating vigilant monitoring appropriate action. Traditional laboratory-based analytical techniques like Gas Chromatography, ICP-OES HPLC have been instrumental in quantifying pollutants. However, their high operational costs, maintenance requirements need for specialized personnel limit widespread use, especially resource-constrained countries. Electrochemical sensors emerged promising solution. They provide real-time, portable cost-effective options on-site detection pollutants water. Current advancements electrochemical are centred around achieving selective using chemical modifiers, all while maintaining electrocatalytic sensitivity reproducibility. These can be tailored target specific contaminants, making them highly efficient tools water quality ensuring sustainability this invaluable resource. In first experimental chapter, glassy carbon electrode (GCE) was modified by an asymmetric metallophthalocyanine (MPc) complex, A3B-CoPc-flav (where A = flavonyloxy substituent B alkynyloxy substituent/molecular mast). The modification achieved via grafting followed clicked chemistry between diazonium-functionalized GCE a-CoPc-flav3 afford GCE|clicked-a-CoPc-flav3. chemically electrodes (CME) were utilized detectors dopamine (DA) under optimized conditions. response GCE|clicked-a-CoPc-flav3 linear concentration range 2 μM 14 μM, attaining limits quantification 0.311 0.942 respectively, reproducibility (%RSD 2.25%, N 3). Interference studies conducted, revealing marginal shift DA peak potential presence interfering substances. Despite shift, current intensity remained largely unaffected, affirming selectivity accuracy CME. capabilities CME further assessed real samples. obtained percentage recoveries (97.1%) well-established HPLC-MS method (113%) within acceptable 80-120%. second platinum (Pt) electropolymerization polypyrrole (PPy) after its co-electrodeposition tetra-[4-((1H benzotriazole)methoxy)phthalocyaninato]cobalt(II) (CoPc-Bzt). electrodeposition CoPc-Bzt performed 1:1 DMF/acetonitrile containing 1 M tetrabutylammonium hexafluorophosphate (NBu4PF6) electrolyte over 20 cycles cyclic voltammetry Pt|PPy/CoPc-Bzt (Bzt benzotriazole). resultant prone fouling analyte interest, mercury(II). Due differential pulse anodic stripping (DPASV) used detect Hg(II) 10 100 range. LOD LOQ found 3.11 10.00 respectively. illustrated that not affected other metal cations. performances (97.4%) Inductively coupled plasma – optical emission spectroscopy (ICP-OES) (112.3%) third Pb sensing capability gold adsorption electrospun nanofibers (ENFs) Nafion (Nf) annealed conductive top-layer evaluated. fabricated ENFs comprised core polymeric nanocomposite tetra-4-(3-oxyflavonephthalocyaninato)cobalt(II) (CoPc-flav), carboxylic acid functionalized multiwalled nanotubes (f-MWCNTs) polyaniline (PANI) encapsulated polyvinyl acetate (PVA) ENFs. CME, Au|ENFs-1-Nf when bare constructed CMEs whose signal stabilities compromised background currents. could Pb(II) cations reproducible manner 3.92%, 3) ranging 8 125 0.51 1.55 obtained, interference severely performance rendered comparable recovery (103%) with (115%). fourth nanofabrication characterization new materials, PANI-CoPc-fur (1) ((PANI CoPc-fur tetra-4-(2-furanmethylthiophthalocyaninato)Co(II)) PANI-CoPc-fur-f-MWCNTs (2) reported. Subsequently, nanofiber (ENF) composite where PVA shell. nanoconjugate, ENFs-2 adsorbed on immobilization permeable adhesion top layer render electrode, GCE|ENFs-2-Nf. classical physical properties electron-mediating synergistically aided promoting activities. Consequently, showed greater cathodic (CV) currents compared electrodes, indicating higher acetaminophen (APAP), emerging pollutant concern. Limits (LOD LOQ) values APAP attained squarewave (SWV) lower those acquired techniques. at GCE|ENFs-2-Nf 200 3.2%, respective calculated 0.094 0.28 Analysis commonly associated interferences metronidazole (MTZ) separation SWV potentials MTZ, whereas there some degree overlap responses DA. (103.8%) liquid chromatography–mass spectrometry (LC–MS) (106%).

Language: Английский

---

Immobilization of cobalt phthalocyanine-imbedded electrospun nanofibers on a gold electrode for the electrocatalytic detection of mercury(II)

International Journal of Electrochemical Science, Journal Year: 2024, Volume and Issue: unknown, P. 100814 - 100814

Published: Oct. 1, 2024

Language: Английский

---