Synthesis and Characterization of Silver Nanoparticles Anchored on Montmorillonite via Chemical Reduction

Abstract:

Montmorillonite clay particles were decorated with silver (Ag) nanoparticles by chemical reduction of Ag nitrate with sodium citrate. X-ray diffraction (XRD) and energy dispersive X-ray spectrometry (EDS) confirmed the presence of metallic Ag on the surface of montmorillonite. The average crystallite size of the Ag nanoparticles obtained from the broadening of the 111 Ag peak ranged at 13-16 nm. On the other hand, the apparent particle sizes obtained from the SEM images were about 79-128 nm, suggesting that the nanoparticles are polycrystalline and possibly agglomerated. The increase in the concentration of reducing agent produced smaller Ag nanoparticles with narrower size distribution. The antibacterial test showed that the Ag nanoparticles, with mean size of 79 nm, adsorbed on montmorillonite were able to inhibit the growth of Staphylococcus aureus (S. aureus) with an antimicrobial index of 0.4.

• Periodical: Nano Hybrids and Composites (Volume 11)
• Pages: 30-37
• DOI: https://doi.org/10.4028/www.scientific.net/NHC.11.30
• Online since: October 2016
• Authors: Danica Louise S. Bonga, Ma. Manna Farrel B. Pinto, Mary Fatima T. Tayad
• Keywords: Antibacterial, Chemical Reduction, Montmorillonite, Nanoparticles, Silver

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