Green Synthesis of Silver Nanoparticles (AgNPs) using Quercetin as Bioreductor Elfi Susanti VH(1), Muhammad Hizbul Wathon (1,a), Lina Mahardiani (1), Rizka Widya Maharani(1)
(1)Department of Chemistry Education, Universitas Sebelas Maret, 57126, Indonesia
a)m.h.wathon[at]staff.uns.ac.id
Abstract
This study aimed to conduct a green synthesis and characterisation of silver nanoparticles (AgNPs) using quercetin as a bioreductor. The synthesis of AgNPs was conducted by reacting quercetin (1 mM) and AgNO3 with various concentrations (0.1 -mM, 1 -mM, 5 -mM, and 10 -mM) at room temperature. The pH of the reaction was maintained at either pH 7 or 10 and the absorbance of AgNPs formation was monitored using a UV-Vis spectrophotometer. The formed AgNPs were characterised using UV-Vis spectrophotometer, FTIR, Particle Size Analyser (PSA), and zeta potential analysis. The formation of AgNPs was observed at the maximum wavelength of 404 nm. Additionally, the FTIR spectra showed the presence of AgNPs at the wavelength number of 1625,82 cm-1, which shows the characteristic peak for AgNPs. The results showed that the most stable AgNPs were obtained using 5 -mM AgNO₃- with pH 10, which produced particles with an average size of 23.21 -nm, a polydispersity index (PDI) of 0.410, and a zeta potential of -30 -mV. The AgNPs formed through this method were classified as nanoparticles with good stability. Further study on the biological activities of AgNPs still needs to be conducted
Keywords: green synthesis, silver nanoparticles (AgNPs), quercetin, bioreductor
