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Journal of Nanomaterials
Volume 2017 (2017), Article ID 1230467, 8 pages
Research Article

Dual Role of a Ricinoleic Acid Derivative in the Aqueous Synthesis of Silver Nanoparticles

1Biological Chemistry and Chemometrics Research Group, Institute of Chemistry, Federal University of Rio Grande do Norte, Lagoa Nova, 59072-970 Natal, RN, Brazil
2Institute of Chemistry, Federal University of Rio Grande do Norte, Lagoa Nova, 59072-970 Natal, RN, Brazil
3Laboratory of Microscopy Applied to Life Science-Lamav, National Institute of Metrology, Quality and Technology-Inmetro, Duque de Caxias, 25250-020 Rio de Janeiro, RJ, Brazil

Correspondence should be addressed to Luiz Henrique da Silva Gasparotto; moc.liamg@ottorapsaghl

Received 8 November 2016; Revised 24 January 2017; Accepted 5 February 2017; Published 23 March 2017

Academic Editor: Piersandro Pallavicini

Copyright © 2017 Isadora Dantas Costa 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.


We show that sodium 9,10-epoxy-12-hydroxytetradecanoate (SEAR), an epoxidized derivative of ricinoleic acid, simultaneously functioned as reducing and stabilizing agents in the synthesis of silver nanoparticles in alkaline aqueous medium. The advantage of using SEAR is its biodegradability and nontoxicity, which are important characteristics for mitigation of environmental impact upon discharge of nanoparticles into terrestrial and aquatic ecosystems. The SEAR concentration was found to impact considerably the size distribution of silver nanoparticles (AgNPs). A concentration below the SEAR critical micelle concentration (CMC) generated 23 nm sized AgNPs with 10 nm standard deviation, while 50 nm sized AgNPs ( nm) were obtained at a concentration above the SEAR CMC. FTIR analysis revealed that the carboxylate that constitutes the SEAR hydrophilic head binds directly to the AgNPs surface promoting stabilization in solution. Finally, AgNPs turned into Ag2S upon contact with wastewater samples from Wastewater Treatment Plant at Federal University of Rio Grande do Norte (UFRN), Brazil, which is an interesting result, since Ag2S is more environmentally friendly than pure AgNPs.