PVP-Assisted Fe-Doped Carbon Dots as Robust Nanozymes for Visual H2O2 Sensing DOI
Anteneh F. Baye,

Lidya Ashenafi,

Shimelis Kebede Kassahun

et al.

ACS Applied Nano Materials, Journal Year: 2024, Volume and Issue: unknown

Published: Dec. 19, 2024

Iron-doped carbon dots (Fe-CDs) exhibit exceptional peroxidase-like activity and are utilized for colorimetric sensing of hydrogen peroxide (H2O2). However, the Fe–H2O2 system falls short generating reactive oxygen species oxidizing TMB (3,3′,5,5′-tetramethylbenzidine) due to Fe aggregation uneven dispersion, resulting in less sensitive H2O2. This study synthesized polymer-assisted Fe-doped CDs with remarkable peroxidase-mimicking through hydrothermal carbonization waste orange peel iron chloride salt. Different types polymers, such as PAN, PVP, PVA, PS, cellulose acetate, were used engineer surface CD successful uniformity doping. Among PVP appropriate molecular weight acts an efficient dispersant prevent regulate size Fe. On other hand, act Lewis acid sites chromogen substrate (hard base) adsorption. The intense interaction between ultrafine CDs/PVP matrix shows excellent peroxidase activating H2O2 TMB. Notably, nanozyme Fe-CD/PVP demonstrates high selectivity concentrated interferences, a low detection limit (52 nM). Moreover, was successfully sense milk.

Language: Английский

Dual-mode sensors based on double enzyme-mimicking MnCu nanoflowers as fluorescence probe for the detection of organophosphorus pesticides and 2,4-dichlorophenol DOI

Ziyu Yan,

Ziwen Liao,

Zhenggang Xiao

et al.

Colloids and Surfaces B Biointerfaces, Journal Year: 2025, Volume and Issue: 251, P. 114608 - 114608

Published: March 12, 2025

Language: Английский

Citations

0
Laccase-mimicking enzyme with fluorescent properties for dual-mode detection of epinephrine and degradation of phenolic pollutants DOI

Huizhu Fan,

Luxi Huang,

Yin Dai

et al.

Microchimica Acta, Journal Year: 2025, Volume and Issue: 192(4)

Published: March 28, 2025

Language: Английский

Citations

0
Ammonia-Etched Laccase-Mimicking Nanofiber-like Enzyme with Fluorescent Properties for the Detection of Oxytetracyclin DOI

Luxi Huang,

Huizhu Fan,

Zhiying Jiang

et al.

ACS Applied Nano Materials, Journal Year: 2025, Volume and Issue: unknown

Published: April 22, 2025

Language: Английский

Citations

0
Thioether-bridged carbon dots-dopamine quinone conjugate probe for glutathione sensing and discrimination between glioblastoma and normal cells DOI

Ningcheng Wei,

Yi Xiao,

Yang Jin

et al.

Talanta, Journal Year: 2025, Volume and Issue: unknown, P. 128249 - 128249

Published: April 1, 2025

Language: Английский

Citations

0
Biomass-Derived Co/MPC Nanocomposites for Effective Sensing of Hydrogen Peroxide via Electrocatalysis Reduction DOI Open Access
Mei Wang,

Jin Cai,

Lihua Jiao

et al.

Catalysts, Journal Year: 2024, Volume and Issue: 14(9), P. 624 - 624

Published: Sept. 16, 2024

Utilizing the full potential of reproducible biomass resources is crucial for sustainable development humanity. In this study, biochar (MPC) was prepared through microwave-assisted pyrolysis sugarcane bagasse. Subsequently, Co nanoparticles were introduced by hydrothermal treatment to form a highly dispersive Co/MPC material. Characterization results indicated that wrapped thin carbon layers and uniformly dispersed on carbon-based skeleton via synthesis approach, providing high-activity space. Thus, material limited glassy carbon; electrode surface, cobalt-based sensing platform (Co/MPC/GCE) built. On basis constructed platform, linear equation fitted concentration change current signal I H2O2. The range 0.55–100.05 mM; detection limit 1.38 μM (S/N = 3); sensitivity 103.45 μA cm−2 mM−1. addition, effect sensor had H2O2 actual water samples conducted using standard addition recovery method; disclosed rate RSD in tap 94.0–97.6% 4.1–6.5%, respectively.

Language: Английский

Citations

0
Ni/N/MPC Nanocomposites Synthesized via Microwave-Assisted Biomass Conversion for Efficient H₂O₂ Detection DOI Creative Commons
Mei Wang, Jin Cai,

Jianmei Bai

et al.

Journal of The Electrochemical Society, Journal Year: 2024, Volume and Issue: 171(11), P. 117505 - 117505

Published: Oct. 29, 2024

In order to improve the sensitivity and stability of material for detection hydrogen peroxide, Ni/N/MPC nanocomposites were synthesized by Ni-based biomass doped with nitrogen. Nickel atoms offer such advantages as good catalytic activity low cost, while nitrogen doping facilitates formation stable hybrid structures abundant functional groups on surface nanocomposites. The linear equation characterizing electrode response from was derived relationship between current signal I H 2 O concentration, demonstrating a range 0.05–240.15 mmol l −1 , along limit 0.84 μmol (S/N = 3). contrast, electrochemical signals Ni/NGCE Ni/N/GCE sensors significantly lower than those obtained composite materials during cyclic voltammetry testing. practical sample analysis, recovery rate RSD in tap water samples 97.2%–98.6% 5.5%–6.4%, respectively. Ni/N/MPC/GCE sensing platform presents excellent enhanced sensitivity.

Language: Английский

Citations

0
PVP-Assisted Fe-Doped Carbon Dots as Robust Nanozymes for Visual H2O2 Sensing DOI
Anteneh F. Baye,

Lidya Ashenafi,

Shimelis Kebede Kassahun

et al.

ACS Applied Nano Materials, Journal Year: 2024, Volume and Issue: unknown

Published: Dec. 19, 2024

Iron-doped carbon dots (Fe-CDs) exhibit exceptional peroxidase-like activity and are utilized for colorimetric sensing of hydrogen peroxide (H2O2). However, the Fe–H2O2 system falls short generating reactive oxygen species oxidizing TMB (3,3′,5,5′-tetramethylbenzidine) due to Fe aggregation uneven dispersion, resulting in less sensitive H2O2. This study synthesized polymer-assisted Fe-doped CDs with remarkable peroxidase-mimicking through hydrothermal carbonization waste orange peel iron chloride salt. Different types polymers, such as PAN, PVP, PVA, PS, cellulose acetate, were used engineer surface CD successful uniformity doping. Among PVP appropriate molecular weight acts an efficient dispersant prevent regulate size Fe. On other hand, act Lewis acid sites chromogen substrate (hard base) adsorption. The intense interaction between ultrafine CDs/PVP matrix shows excellent peroxidase activating H2O2 TMB. Notably, nanozyme Fe-CD/PVP demonstrates high selectivity concentrated interferences, a low detection limit (52 nM). Moreover, was successfully sense milk.

Language: Английский

Citations

0