Spectral studies of silver nanoparticles biosynthesized by Origanum majorana

Green Processing and Synthesis

article

Moustafa Zahran¹  Maged El-Kemary²  Shaden Khalifa³  Hesham El-Seedi¹ 

[1] Department of Chemistry, Faculty of Science, El-Menoufia University;Division of Photo- and Nanochemistry, Chemistry Department, Faculty of Science, Kafrelsheikh University;Department of Molecular Biosciences, Stockholm University, the Wenner-Gren Institute;Division of Pharmacognosy, Department of Medicinal Chemistry, Uppsala University;Department of Chemistry, Faculty of Science, University of Malaya

关键词: biosynthesis;    cyclic voltammetry (CV);    optical properties;    Origanum majorana;    silver nanoparticles;   

DOI  :  10.1515/gps-2016-0183

来源: De Gruyter

【 摘 要 】

Silver nanoparticles (AgNPs) were biologically synthesized in an eco-friendly manner using aqueous leaf extract of Origanum majorana plant and silver nitrate (AgNO 3 ) solution. Size, shape, and crystallinity of the biosynthesized AgNPs were determined by using a transmission electron microscope (TEM). Zeta potential analyzer was used to prove the stability of the metallic nanoparticles, while Fourier transform infrared spectroscopy was used to identify the bioreducing and capping agents. AgNPs were electrochemically investigated using cyclic voltammetry (CV), while the optical properties of the metallic nanoparticles were studied using UV-Vis and fluorescence spectroscopies. According to TEM images, AgNPs are spherical with an average size of 35 nm. TEM also refers to the presence of mono and polycrystalline AgNPs. The value of zeta potential (−39 mV) proved the stability of AgNPs caused by capping molecules of O. majorana plant. CV studies showed that AgNPs were electrochemically investigated at 0.39 mV. AgNPs showed a surface plasmon resonance peak at 440 nm, while the emission peak was detected at 466 nm. These nanoparticles are promising for many industrial and medical applications.

【 授权许可】

CC BY