Carboxylic End-Group in Perfluorinated Ionomers: Degradation Mechanism and Modification DOI Open Access

E.A. Baturina,

Sofia M. Morozova

Published: Feb. 1, 2024

Perfluorinated ionomers with ionic sulfonic groups are among the most commonly used materials as a polymer electrolyte membrane (PEM) for hydrogen fuel cells. Despite high chemical resistance of C-F bond, which determines use this class compounds, during operation cell, degrades, resulting in significant deterioration operating parameters cell. One reasons od degradation is presence terminal carboxyl ionomer, which, under attack radicals, disintegrate formation products that poison catalyst and destroy membrane. This review examines approaches to study associated carboxylic group, including both experimental data modeling, also provides an overview modify ionomer order reduce concentration end-groups.

Language: Английский

Graphene oxide/Cu–MOF-based electrochemical immunosensor for the simultaneous detection of Mycoplasma pneumoniae and Legionella pneumophila antigens in water DOI Creative Commons

Kanagavalli Pandiyaraj,

Ragi Adham Elkaffas,

M. Infas H. Mohideen

et al.

Scientific Reports, Journal Year: 2024, Volume and Issue: 14(1)

Published: July 26, 2024

The combination of copper-metal organic framework (Cu-MOF) with graphene oxide (GO) has received growing interest in electrocatalysis, energy storage and sensing applications. However, its potential as an electrochemical biosensing platform remains largely unexplored. In this study, we introduce the synthesis GO/Cu-MOF nanocomposite application simultaneous detection two biomarkers associated lower respiratory infections, marking first instance use capacity. physicochemical properties structural elucidation composite were studied support XRD, FTIR, SEM techniques. immunosensor was fabricated by drop casting on dual screen-printed electrodes followed functionalization pyrene linker. covalent immobilization monoclonal antibodies bacterial antigens Mycoplasma pneumoniae (M. pneumoniae; M. p.) Legionella pneumophila (L. pneumophila; L. achieved using EDC-NHS chemistry. differential pulse voltammetry (DPV) signals developed demonstrated a robust correlation across broad concentration range from 1 pg/mL to 100 ng/mL. shown high degree selectivity against for various pathogens. Moreover, successfully applied spiked water samples showing excellent recovery percentages. We attribute sensitivity enhanced electrocatalytic characteristics, stability conductivity GO-MOF well synergistic interactions between GO MOF. This offers swift analytical response, simplicity fabrication instrumentation, rendering it appealing on-field monitoring pathogens environmental samples.

Language: Английский

Citations

5
Synergistic convergence of materials and enzymes for biosensing and self-sustaining energy devices towards on-body health monitoring DOI Creative Commons
Suntisak Khumngern, Itthipon Jeerapan

Communications Materials, Journal Year: 2024, Volume and Issue: 5(1)

Published: July 24, 2024

Abstract Wearable enzyme-based biosensors enable advanced healthcare diagnostics through the monitoring of biomarkers and physiological states. The integration materials engineering enzyme conjugation has established groundwork for advancements in modern analytical chemistry, poised to extend frontiers wearable biosensing further. Recent enzymatic biofuel cells have also enhanced devices by harnessing biofuels, such as glucose lactate biofluids. Importantly, offer potential self-powered biosensors. Here, we present an overview principles considerations associated with integrating enzymes electrodes achieve effective self-sustaining cell-based energy systems. Furthermore, discuss challenges encountered sensors cells. Representative applications settings are highlighted, along a summary real sample analyses, emphasizing concentration ranges analytes actual sweat samples underscore their relevance real-world scenarios. Finally, discussion explores anticipated impact future material innovations integrations on development next-generation biodevices.

Language: Английский

Citations

4
Recent Progress of Polymer-Based Biosensors for Cancer Diagnostic Applications: Natural versus Synthetic Polymers DOI Creative Commons
Elbadawy A. Kamoun, Mahmoud Elsabahy, Abdullah M. M. Elbadry

et al.

ACS Omega, Journal Year: 2025, Volume and Issue: 10(9), P. 8816 - 8831

Published: March 3, 2025

Early diagnosis of cancer can significantly contribute to improving therapeutic outcomes and enhancing survival rates for patients. Polymer-based biosensors have emerged as a promising tool detection due their high sensitivity, selectivity, low cost. These utilize functionalized polymers in different parts the body detect biomarkers biological samples. This approach offers several advantages over traditional methods, including real-time monitoring noninvasive while maintaining sensitivity accuracy. review discusses recent advances development polymer-based design, fabrication, performance. The essential characteristics biosensing devices are presented, along with examples natural synthetic commonly utilized biosensors. Furthermore, strategies employed tailor improve applications future perspectives application also highlighted. Integrating these advancements will illuminate potential transformative tools early management cancer.

Language: Английский

Citations

0
Mini-review on degradation mechanism of perfluorosulfonic acid membranes induced by carboxylic end-groups DOI

Ekaterina P. Baturina,

Alexey M. Kashin,

Sofia M. Morozova

et al.

Polymer Degradation and Stability, Journal Year: 2024, Volume and Issue: 227, P. 110857 - 110857

Published: June 1, 2024

Language: Английский

Citations

3
Research on the Detection of Hg(II) in Seawater Using GR-MWCNTs/CeO2-Modified Electrodes DOI Creative Commons

Huili Hao,

Chengjun Qiu, Wei Qu

et al.

Chemosensors, Journal Year: 2024, Volume and Issue: 12(7), P. 128 - 128

Published: July 4, 2024

Hg(II), as an extremely hazardous heavy metal contaminant in the environment, poses a significant potential hazard to human health and ecosystems. A GR-MWCNTs-COOH/CeO2/Nafion composite film-modified glassy carbon electrode was prepared using drop-casting method this study. The GR-MWCNTs-COOH/CeO2/Nafion/GCE electrochemically investigated through cyclic voltammetry (CV) differential pulse stripping (DPSV). Additionally, surface morphologies of film were evaluated scanning electron microscopy (SEM). conditions, such buffer solution, pH, deposition potential, time, modified thickness, Nafion content, optimized. Under optimal experimental good linear relationship between peak current response Hg(II) its concentration range 5–100 μg·L−1 observed, with detection limit 0.389 μg·L−1. When it used detect offshore seawater, recovery rate ranged from 94.72% 103.8%, RSDs ≤ 5.79%.

Language: Английский

Citations

3
Carboxylic End-Group in Perfluorinated Ionomers: Degradation Mechanism and Modification DOI Open Access

E.A. Baturina,

Sofia M. Morozova

Published: Feb. 1, 2024

Perfluorinated ionomers with ionic sulfonic groups are among the most commonly used materials as a polymer electrolyte membrane (PEM) for hydrogen fuel cells. Despite high chemical resistance of C-F bond, which determines use this class compounds, during operation cell, degrades, resulting in significant deterioration operating parameters cell. One reasons od degradation is presence terminal carboxyl ionomer, which, under attack radicals, disintegrate formation products that poison catalyst and destroy membrane. This review examines approaches to study associated carboxylic group, including both experimental data modeling, also provides an overview modify ionomer order reduce concentration end-groups.

Language: Английский

Citations

1