Abstract:
Ag-Au Bimetallic nanoparticles (BNPs) were synthesized by green method using Northern Catalpa leaf extract (Catalpa Specoisa) as a stabilizing and reducing agent. The synthesized Ag-Au BNPs were analyzed using UV-Vis Spectroscopy, Fourier Transform Infrared Spectroscopy (FTIR), Scanning Electron Microscopy (SEM), Energy Dispersive Spectroscopy (EDS) and X-ray Diffraction (XRD) Spectroscopy. Absorption band of Ag-Au BNPs have maximum wavelength at 540nm confirm the successful formation of Ag-Au bimetallic nanoparticles. Ag-Au BNPs have stretching band at 488 cm-1 in their FTIR spectra which indicates the formation of Ag-O or Ag-O-Au bonds. Face centered cubic structures of Ag-Au BNPs were confirmed by XRD, which further verified their average particle size to be 22nm. The surface morphology and particle size were determined by SEM. EDX was examined to find out the elemental composition of Ag-Au BNPs. The electrochemical process was carried out using Cyclic Voltammetry (CV) and Electrochemical Impedance Spectroscopy (EIS). Ag-Au BNPs modified Glassy Carbon Electrodes were prepared by drop-coating method for Congo-Red (CR) dye sensing. The limit of detection (LOD) was 2.85 µM and limit of quantification (LOQ) was 22.0 µM. The Ag-Au 2:1 BNPs modified electrode proved to be highly sensitive and stable for the simultaneous detection of CR.
Page(s):
68-68
DOI:
DOI not available
Published:
Journal: 1st International Conference on "Recent Advances in Green Biotechnology and Climate Resilience", September 15-16, 2025, Volume: 1, Issue: 1, Year: 2025