Engineering and Technology Journal

In this present work we have synthesized stable silver
nanoparticles (Ag-NPs) by chemical reduction with aqueous solutions of
silver nitrate (i) propylene glycol (ii) glycerin as reducing agents and guar
gum as a stabilizer. The reaction were done at room temperature and at
pH=8. Systematic characterizations of the Ag-NPs were done using UV-Vis,
zeta potential analysis, X-Ray diffraction (XRD), AFM and SEM which
reveal stable Ag-NPs. These measurements indicate that the particles are
mostly spherical in shape. The UV-Vis spectra of the result solution of Ag-
NPs show an absorption peak at 412 nm and 424 nm for using propylene
glycol and for using glycerin respectively. These color occurring due to
Surface Plasmon Resonance (SPR). The SEM measurements gave a particle
size of 40 -70 nm. Nano silver showed stability for long periods of time to
more than nine months, and this can be an economical and effective way for
wide scale synthesis of Ag-NPs which applicable for various medical
therapies.