Ecofriendly Sunlight‐Mediated Nontoxic Bimetallic Nanoparticles: Synthesis, Reusable Catalytic Membrane, and Biosensor Applications

Ecofriendly Sunlight‐Mediated Nontoxic Bimetallic Nanoparticles: Synthesis, Reusable Catalytic Membrane, and Biosensor Applications

Abstract Bimetallic nanoparticles (BMNPs) combine the desirable properties of two distinct metals that outperform conventional monometallic nanoparticles (NPs). This work presents a novel ecofriendly silver‐copper (Ag–Cu) BMNPs synthesis using sunlight as a green reducing agent, enableing rapid Ag–C...

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Main Authors: Samy M. Shaban, Sihyeok Kim, N. M. El Basiony, Jincymol Kappen, Mohamed H. Mostafa, Ahmed Y. Elbalaawy, Mohamed R. Elmasry, Jihoon Shin, Il Jeon, Dong‐Hwan Kim
Format: Article
Language:English
Published: Wiley 2025-07-01
Series:Advanced Science
Subjects:
Ag–Cu bimetallic nanoparticles
Gemini surfactant
H₂O₂ detection
membrane‐assisted 4‐NP reduction
peroxidase‐mimic activity
sunlight‐induced reduction
Online Access:https://doi.org/10.1002/advs.202503120
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Summary:Abstract Bimetallic nanoparticles (BMNPs) combine the desirable properties of two distinct metals that outperform conventional monometallic nanoparticles (NPs). This work presents a novel ecofriendly silver‐copper (Ag–Cu) BMNPs synthesis using sunlight as a green reducing agent, enableing rapid Ag–Cu BMNPs formation at room temperature within 10 min. This method exploiting the facile reduction of Ag⁺ to Ag⁰, which subsequently mediates the reduction of Cu2⁺ to Cu⁰ via water radiolysis‐generated species. The Ag–Cu BMNPs were integrated into two reusable catalytic membranes: PTFE@Ag–Cu, formed by immobilizing Ag–Cu BMNPs onto a polytetrafluoroethylene (PTFE) syringe filter, and ACF@Ag–Cu, synthesized via in‐situ growth of Ag–Cu BMNPs on activated carbon fiber (ACF) cloth. PTFE@Ag–Cu displays exceptional performance and reusability, converting 2100 mL of 0.15 mM p‐nitrophenol to p‐aminophenol over 105 cycles at a flow rate of 20 mL min−1. The Ag–Cu BMNPs also exhibit peroxidase‐mimic activity, enabling colorimetric H2O2 detection with a range of 0–200 mM and a limit of detection (LOD) of 13.3 µM in solution. Further, the Ag–Cu nanoenzyme demonstrates strong potential for electrochemical glucose detection, achieving an LOD of 0.1 µM and sensitivity of 5221 µA × 10−6 m⁻1 cm⁻2.
ISSN:2198-3844

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