Photo-Biochemical Synthesis of Silver Nanoparticles

Abstract

Nanoparticles exhibit localized surface plasmons as a direct consequence of size. This study focuses on photochemical synthesis through the irradiation of white LED light at different ranges of wavelengths: blue, green, and red. This technique allows a rapid synthesis to obtain colloidal silver nanoparticles using Sedum Praealtum extract as a reducing and stabilizing agent, and AgNO3 (20 mgL-1) as a precursor agent. The experimentation was carried out for each color, in times of 1, 2, and 3 hours. The colloidal solutions obtained from the synthesis were analyzed by UV-Vis spectroscopy, obtaining favorable results with blue radiation in a time of 2 hours, since the characteristic plasmon was observed at 421 nm with an absorbance of 0.15 au.