Greem synthesis of Ag nanoparticles using quercetin flavonoid: Synthesis and characterization by UV/VIS and FTIR techniques

The green synthesis of silver nanoparticles paved the way to improve and protect the environment by decreasing the use of toxic chemicals and eliminating biological risks in biomedical applications [1, 2]. Quercetin, a flavonoid, is present in several foods as vegetables fruit, wine and tea exerting beneficial effects on health as protection against various diseases such as cancer, cardiovascular diseases and aging [3]. Green synthesis of silver nanoparticles using 10 mM Quercetin flavonoid and 20 mM AgNO3 in pH 10 are shown in Fig. 1. Fig. 1A shows the color of the reaction medium from yellow (quercetin) to gray (AgNPs). Fig. 1B shows de characteristic surface Plasmon absorption band at 375 nm. The structure of quercetin is shows in Fig. 1C. The Hydroxyl groups (3500 cm-1) are not observed in FTIR spectra after AgNPs obtained indicating that the reduction process occurred and AgNPs were obtained. The method is simple, economic, efficient and nontoxic.