A PROCESS FOR SYNTHESIS OF BIMETALLIC SILVER GOLD NANOPARTICLES FROM WEEDS

摘要

The present invention relates to a green eco-friendly and one pot synthetic method for the synthesis of bimetallic (Au/Ag) nanoparticles of desired size and shape. The method comprises of reacting silver and gold metal salt solutions with weed extracts in aqueous medium. The weed extract used in the present invention is prepared from any one of the weed selected from the group comprising of lantana, ipomoea, mimosa and coral vine. From the method it is possible to prepare bimetallic (alloy-Au/Ag) nanoparticles, with the metals (Au/Ag) substantially interspersed throughout the particles by altering the order of addition of the reagents and time of addition. Mono and poly dispersed bimetallic (Au/Ag) nanoparticles of desired size and shape can also be prepared by optimizing the reagents and reaction conditions.