Green Synthesis and Characterization of Gold Nanoparticles Using Aqueous Extract of Menthapolegium

In this research, the results of two existing methods for synthesizing gold nanoparticles, i.e., the green and environment-friendly method and the usual chemical method called Turkovich, were compared and analyzed. In the green method, the extract of the aerial parts of the medicinal plant Mentha pulegium was used as a regenerating agent, and both methods, SEM, TEM, UV-VIS, EDX, and DLS, investigated the properties of the synthesized gold nanoparticles. The results indicated that the green synthesis of gold nanoparticles by extracting the aerial parts of the Mentha pulegium plant was smaller and more stable than the Turkevich method. SEM and TEM results show that the morphology of all nanoparticles is spherical. The size of nanoparticles synthesized by sodium citrate is ۱۰.۳ nm, and the size of nanoparticles synthesized by Mentha pulegium plant extract is ۹.۶ nm. The UV-VIS results show almost absorption in the region of ۵۲۶ nm for gold nanoparticles synthesized by sodium citrate and absorption in the region of ۴۲۱ nm for gold nanoparticles synthesized by Mentha pulegium plant extract. The synthesized gold nanoparticles had antibacterial activity against different bacteria.

کلیدواژه ها:

Green synthesis ، Mentha pulegium ، gold ، Nanoparticle