Journal
POWDER TECHNOLOGY
Volume 185, Issue 3, Pages 251-257Publisher
ELSEVIER SCIENCE BV
DOI: 10.1016/j.powtec.2007.10.025
Keywords
chitosan; silver nanoparticle; suspension; composite
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Silver/chitosan nanocomposites were prepared by using basic chitosan suspension as a stabilizer and as a reductant in the absence of other chemicals. The size and distribution of the resulting nanocomposite were strongly dependent on the concentration of chitosan and sodium hydroxide. UV-vis spectra and analytical electron microscopy (AEM) revealed the presence of silver/chitosan nanocomposites. In addition, Ag nanoparticles were obtained by annealing silver/composites at 600 degrees C. These nanoparticles were characterized by field emission scanning electron microscopy (FESEM) and energy dispersive X-ray spectrometry (EDS). The FESEM indicated that the size of a majority of the Ag nanoparticles ranged between 10 and 150 mm. A change in the nanoparticles to porous-like nanostructures was observed when the composite feeding amount was increased, the annealing tithe prolonged, and the reaction temperature elevated. (C) 2007 Elsevier B.V. All rights reserved.
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