Since this work's goal is to create magnetic monometallic and magnetic bimetallic nanoparticles will proceed without using any chemicals. This study reports the green synthesis of Cu, Ag, and Cu-Ag nanoparticles at room temperature using Musa paradisiaca (banana) leaf extract. Our current study also focuses on determining how effective the leaf extract of Musa paradisiaca (commonly known as banana) is as a reducing and stabilizing agent. After adding the Musa paradisiaca (banana) leaf extract to the solution containing the metal salt, constant stirring was performed until the reaction was finished. X-ray Diffraction (XRD) and the Fourier transform infrared spectroscopy (FTIR) was used to examine the synthesized nanoparticles. The major types of equipment for our characterization were Energy Dispersive X-ray Spectroscopy (EDS), Field Emission Scanning Electron Microscopy (FESEM), Thermogravimetric Analysis (TGA), and Vibrating Sample Magnetometer (VSM). The analyses revealed that Musa paradisiaca (Banana) leaf extract efficiently reduced the Cu, Ag, and magnetic Cu-Ag nanoparticles. Biomolecules from Musa paradisiaca (banana) leaves were adsorbed on nanoparticle surfaces, producing a capping layer and stabilizing the nanoparticles. The average crystalline sizes of Cu, Ag and Ag-Cu nanoparticles were about 19 nm, 13 nm, and 23.15 nm, respectively. Surface morphology and particle size distribution were also observed using a modern FESEM device. ImageJ software was used to compute the average particle size and the distribution of particle sizes. The calculated particle size range was (5nm - 35 nm), (10 nm – 60 nm), and (20 nm – 90 nm) for Cu NPS, Ag NPs, and Cu-Ag NPs, respectively. Simultaneously, the presence of elements in our synthesized nanoparticles was also investigated with the help of EDX tools. Organic functional groups were confirmed using FTIR analysis. In the last part, the magnetic behavior of our synthesis Cu-Ag bimetallic nanoparticles was analyzed using a VSM machine, and we found saturation magnetization (Ms) was 0.58 emu g-1. The coercivity (Hc) was 153 Oe. According to the findings, Musa paradisiaca (banana) leaf extract is a promising reducing and stabilizing agent.
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