Abstract

Chemical method approach was utilized to synthesize silver nanoparticles (Ag-NPs) using seaweed extract combined with varying concentrations of NaBH4. The seaweed extract functioned as an environmentally friendly stabilizing agent, while NaBH4 acted as the reducing agent. While the increasing of NaBH4 concentrations, the quantity of Ag-NPS were increased and reaching its highest peak at 0.04 M. UV–visible spectroscopy confirmed the formation of Ag/κ-carrageenan complexes through the appearance of surface plasmon resonance peaks in the range of 390 to 400 nm. Transmission electron microscopy (TEM) revealed that the silver nanoparticles were uniformly distributed, with an average size of about 28 nm. Atomic force microscopy (AFM) showed that the nanoparticles had a spherical shape. Fourier-transform infrared (FT-IR) spectroscopy indicated that compounds present in the seaweed extract played a key role in the nanoparticle synthesis.

Keywords

Chemical Method, NaBH4, Silver- Nanoparticles, Seaweed Extract, Transmission Electron Microscopy,

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