ScholarWorks@성균관대학교

초록

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 Ag-0, which subsequently mediates the reduction of Cu2+ to Cu-0 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 10(5) 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 mu M in solution. Further, the Ag-Cu nanoenzyme demonstrates strong potential for electrochemical glucose detection, achieving an LOD of 0.1 mu M and sensitivity of 5221 mu A x 10-6 m(-1) cm(-2).

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