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International Journal of Spectroscopy
Volume 2012 (2012), Article ID 638692, 7 pages
Research Article

Room Temperature Synthesis and Catalytic Properties of Surfactant-Modified Ag Nanoparticles

Key Laboratory of Corrosion Science, Institute of Oceanology, Chinese Academy of Sciences, Shandong, Qingdao 266071, China

Received 27 May 2011; Revised 19 July 2011; Accepted 29 July 2011

Academic Editor: Santanu Bera

Copyright © 2012 Weihua Li 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.


Well-dispersed Ag nanoparticles with size of 20–30 nm were synthesized in water at room temperature with a self-made novel imidazoline Gemini surfactant quaternary ammonium salt of di (2-heptadecyl-1-formyl aminoethyl imidazoline) hexanediamine. Transmission electron microscopy, X-ray powder diffraction, ultraviolet-visible absorption spectra, and Fourier transform infrared ray were used to characterize the Ag nanoparticles. Results showed that the micellized aggregation of imidazoline Gemini surfactant in water, the growth of Ag initial particles, and the interaction (adsorption and coordination) between surfactant and Ag+/Ag nanoparticles took place simultaneously to form the well-dispersed Ag nanoparticles. Catalytic results show that the surface-modified Ag product was an active metal catalyst for methyl orange reduction reaction due to the effective adsorption between Ag nanoparticles and methyl orange molecules, which was of promising application in environmental protection.