Khalid AbdelRahim
King Saud university, Saudi Arabia
Title: Extracellular biosynthesis of silver nanoparticles using Rhizopus stonililifer
Biography
Biography: Khalid AbdelRahim
Abstract
Synthesis of silver nanoparticles (AgNPs) has become a necessary field of applied science. Biological method for synthesis of AgNPs by Rizobus stonilifer aqueous mycellical extract was used. The AgNPs were identified by UV–visible spectrometry, X-ray diffraction (XRD), Transmission electron microscopy (TEM) and Fourier transform Infrared spectrometry (FT-IR). Presence of surface plasmon band around 420 nm indicates AgNPs formation . The characteristic of the of AgNPs within the face-centered cubic (fcc) structure are indicated by the peaks of the X-ray diffraction (XRD) pattern corresponding to (111), (200) and (220) planes. Spherical, mono-dispersed and stable AgNPs with diameter around 9.47 nm were prepared and affirmed by high- resolution transmission electron microscopy (HR-TEM). Fourier Transform Infrared (FTIR) shows peaks at 1426 and 1684 cm-1 that affirm presence of coat covering protein the AgNPs which is known as capping proteins. Parameters optimization showed smallest size of AgNPs ( 2.86 ± 0.3 nm ) was obtained with 10−2 M AgNO3 at 40 º C. Present study provides the proof that the molecules within aqueous mycellial extract of R. stonilifer facilitate synthesis of AgNPs and highlight on value-added from R. stonilifer for cost effective. Also, eco-frindely medical and nanotechnology-based industries could also be provided. Size of prepared AgNPs could be controlled by temperature and AgNO3 concentration. Further studies are required to study effect of more parameters on size and morphology of AgNPs as this will help in control of large scale production of biogenic AgNPs.