Green Synthesis of Silver Nanoparticles Using Aqueous Extract of Salvia Limbata

Silver nanoparticles have unique properties in molecular diagnostic and are also used in several aspects. AgNPs are used as anti-bacterial agents, catalyst, and optical sensors. [1]. Physical and chemical methods are the major ways to synthesis of silver nanoparticles (AgNPs); but the procedures are toxic, environmentally hazardous, and expensive [2]. Using of microorganisms and plant extracts is an alternative methods, which stands in green chemistry scope. In this study we synthesis the AgNPs using water extract of salvia limbata and also evaluate the effect of temperature on the synthesis of AgNPs. First, The flower of plant was collected, driedand milled. 100 g of the dried powder of the plant partwas added to 200 ml of double distilled water and boiled for 5 min. The obtained extract was filtered. Finally 5 ml of the extract was added to 100 ml of 1mM aqueous AgNO3 solution. The mixture was stirred for 24 h at different temperatures (30, 40, 50, 60, and 70 °C). The maximum yield of Ag NPs were obtained at 30°C. Formation of nanoparticles were characterized by Uv-Vis., FT-IR spectroscopy, X-ray, AFM, and SEM.