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The Scientific World Journal
Volume 2014 (2014), Article ID 514563, 11 pages
Research Article

A Novel Photosynthesis of Carboxymethyl Starch-Stabilized Silver Nanoparticles

National Research Centre, Textile Research Division, El-Behouth Street, Dokki, P.O. Box 12311, Giza, Egypt

Received 13 August 2013; Accepted 4 November 2013; Published 29 January 2014

Academic Editors: A. Jacquot, Y.-L. Kuo, Z. Peng, R.-C. Sun, A. Tonkikh, and Z. Zhou

Copyright © 2014 M. A. El-Sheikh. 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.


The water soluble photoinitiator (PI) 4-(trimethyl ammonium methyl) benzophenone chloride is used for the first time in the synthesis of silver nanoparticles (AgNPs). A new green synthesis method involves using PI/UV system, carboxymethyl starch (CMS), silver nitrate, and water. A mechanism of the reduction of silver ions to AgNPs by PI/UV system as well as by the newly born aldehydic groups was proposed. The synthesis process was assessed by UV-vis spectra and TEM of AgNPs colloidal solution. The highest absorbance was obtained using CMS, PI and AgNO3 concentrations of 10 g/L, 1 g/L, and 1 g/L, respectively; 40°C; 60 min; pH 7; and a material : liquor ratio 1 : 20. AgNPs so-obtained were stable in aqueous solution over a period of three weeks at room temperature (~25°C) and have round shape morphology. The sizes of synthesized AgNPs were in the range of 1–21 nm and the highest counts % of these particles were for particles of 6–10 and 1–3 nm, respectively.