Gold nanoparticles (GNPs) have gained an immense interest due to their wide applications in the fields of biomedical and pharmaceutical, which is due to their unique physico-chemical properties when they are reduced to their nanoscale size range. Here, we present a novel single step bio-friendly process for synthesis of fructose (monosaccharide), sucrose (disaccharide) and raffinose (trisaccharide) capped GNPs, wherein sugar is directly capped onto gold without the use of any secondary capping/stabilizing agent. Our study is mainly focused on the effect of various lengths of sugars in formation and catalytic reduction activity of sugar capped GNPs. Characterization of synthesized GNPs was done using various analytical techniques such as transmission electron microscopy (TEM), SEM-EDS, FTIR, UV-Vis spectroscopy. p-nitrophenol assay was used to evaluate the catalytic reduction activity of various sugar capped GNPs at different temperature using UV-Vis spectrometer. Using the spectroscopic data, rate constant for three sugar capped GNPs was determined followed by its activation energy and exponential factor using different equations. From the kinetic data, the catalytic reduction activity for three sugars was in the descending order of fructose, sucrose and raffinose GNPs respectively. This difference in the catalytic activity is believed to be due to the size of ligand on gold surface which greatly influences the surface/volume ratio.

Green synthesis, characterization, and evaluation of sugar coated gold nanoparticles for catalytic applications

248th National Meeting (2014)

The official archive and repository for all ACS Meetings & Expositions abstracts and select posters or presentations.