Abstract
Present work reports exceptionally high reducing capacity of Trapa bispinosa to synthesize monodispersed silver nanoparticles (SNPs) within 120 seconds at 30°C which is the shortest tenure reported for SNP synthesis using plants. Moreover, we also instigated impact of different pH values on fabrication of SNPs using visible spectroscopy with respect to time. Percentage conversion of Ag+ ions into Ag° was calculated using ICP-AES analysis and was found to be 97% at pH = 7. To investigate the reduction of Ag+ ions to SNPs, cyclic voltammetry (CV) and open circuit potential (OCP) using 0.1 M KNO3 were performed. There was prompt reduction in cathodic and anodic currents after addition of the peel extract which indicates the reducing power of T. bispinosa peel. Stability of the SNPs was studied using flocculation parameter (FP) which was found to be least at all the pH values. FP was found to be indirectly proportional to stability of the nanoparticles.
Highlights
Marriage of biology with nanotechnology was one of the most fruitful outcomes in material research, in synthesis of metallic nanoparticles such as gold and silver
With a novel aim to use plants as ideal catalysts for commercial production of silver nanoparticles (SNPs) having desired properties, we have explored the peel of T. bispinosa for ultrafast reduction of silver ions (Ag+)
T. bispinosa can be used as a potential alternative to available chemical methods used for commercial production of SNPs due to its exceptionally high reducing potential which in turn is due to presence of high amount of antioxidants
Summary
Marriage of biology with nanotechnology was one of the most fruitful outcomes in material research, in synthesis of metallic nanoparticles such as gold and silver. Living systems have learned over the tenure of millions of years of evolution to combat metal toxicity. The molecular capacity of plants [2], bacteria [2, 3], and algae [4] to convert metal ions into well-dispersed nanoparticles has been explored. Tuning the parameters for the synthesis of nanoparticles of desired optical properties offers an intelligent and economical solution to avoid the toxicity as well as cost factor for biological applications like targeted drug delivery unlike chemical methods such as molecular beam epitaxy [5] and chemical vapour deposition [6] which involves toxic materials as precursors and expensive sophisticated techniques.
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