Table of Contents
International Scholarly Research Notices
Volume 2014, Article ID 702396, 12 pages
http://dx.doi.org/10.1155/2014/702396
Research Article

Facile Precursor for Synthesis of Silver Nanoparticles Using Alkali Treated Maize Starch

1Textile Research Division, National Research Centre, Dokki, Cairo 12311, Egypt
2Chemistry Department, Faculty of Science, Helwan University, Ain Helwan, Cairo 11795, Egypt

Received 16 March 2014; Accepted 20 September 2014; Published 29 October 2014

Academic Editor: Mohammad A. Behnajady

Copyright © 2014 M. H. El-Rafie et al. This is an open access article distributed under the Creative Commons Attribution License, which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited.

Abstract

Silver nanoparticles were prepared by using alkali treated maize starch which plays a dual role as reducer for AgNO3 and stabilizer for the produced AgNPs. The redox reaction which takes a place between AgNO3 and alkali treated starch was followed up and controlled in order to obtain spherical shaped silver nanoparticles with mean size 4–6 nm. The redox potentials confirmed the principle role of alkali treatment in increasing the reducibility of starch macromolecules. The measurements of reducing sugars at the end of reaction using dinitrosalicylic acid reagent (DNS) were carried out in order to control the chemical reduction reaction. The UV/Vis spectra show that an absorption peak, occurring due to surface plasmon resonance (SPR), exists at 410 nm, which is characteristic to yellow color of silver nanoparticles solution. The samples have been characterized by transmission electron microscopy (TEM), which reveal the nanonature of the particles.