Article ID | Journal | Published Year | Pages | File Type |
---|---|---|---|---|
8330599 | International Journal of Biological Macromolecules | 2015 | 8 Pages |
Abstract
A facile one-pot approach for rapid synthesis of silver and gold nanoparticles (Ag NPs and Au NPs) with narrow size distribution and good stability was described by reducing silver nitrate and chloroauric acid with polysaccharide dextrin. Here, dextrin was used as both a reducing and stabilizing agent for synthesis of NPs. The as-synthesized Ag NPs and Au NPs were characterized by UV-visible absorption spectroscopy, transmission electron microscopy (TEM) and X-ray diffraction (XRD). The Ag NPs and Au NPs exhibited an absorption maxima at 404 and 547Â nm respectively. TEM images showed NPs in the range of 8-28Â nm. The crystallinity of the NPs was measured by XRD analysis. Furthermore, the as-prepared Ag NPs revealed colorimetric sensor property for detection of Cu2+ ions based on changes in absorbance resulting from metal ion-induced aggregation of NPs or direct deposition of metal ions onto NPs. The as-prepared Au NPs exhibited a notable catalytic activity toward the reduction of 4-nitrophenol to 4-aminophenol in the presence of NaBH4.
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Authors
Kalipada Bankura, Dipak Rana, Md. Masud Rahaman Mollick, Sutanuka Pattanayak, Biplab Bhowmick, Nayan Ranjan Saha, Indranil Roy, Tarapada Midya, Gadadhar Barman, Dipankar Chattopadhyay,