Room temperature Phytosynthesis of Ag/Co bimetallic nanoparticles using aqueous leaf extract of Canna indica (original) (raw)
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Green synthesized of silver nanoparticles using Canna indica leaf extract and its characterization
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Nature has a massive range of diverse species of flora. The phytochemical content of each plant may vary due to the diverse climate and different geographical areas. Several plants have been outlined for their reducing properties and highly exploited for the green synthesis of metal nanoparticles. Moreover, phytochemicals present in plant parts (leaf, root, flower, fruit, etc.) act as both reducing and capping agents for the production of nanoparticles. Plant-mediated nanoparticles have gained so much attention in the present era for its green and rational approach and developed as a green substitute to conventional synthesis approaches. This critical review encloses literature, phytosynthesis methods, and factors affecting the synthesis of silver nanoparticles. Also, the main characterization techniques especially, spectroscopic techniques are epigrammatically summarized and discussed here.
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The main antioxidants present in plant extracts—quercetin, β-carotene, gallic acid, ascorbic acid, hydroxybenzoic acid, caffeic acid, catechin and scopoletin—are able to synthesize silver nanoparticles when reacting with a Ag NO3 solution. The UV-visible absorption spectrum recorded with most of the antioxidants shows the characteristic surface plasmon resonance band of silver nanoparticles. Nanoparticles synthesised with ascorbic, hydroxybenzoic, caffeic, and gallic acids and scopoletin are spherical. Nanoparticles synthesised with quercetin are grouped together to form micellar structures. Nanoparticles synthesised by β-carotene, were triangular and polyhedral forms with truncated corners. Pentagonal nanoparticles were synthesized with catechin. We used Fourier-transform infrared spectroscopy to check that the biomolecules coat the synthesised silver nanoparticles. X-ray powder diffractograms showed the presence of silver, AgO, Ag2O, Ag3O4 and Ag2O3. Rod-like structures were obtai...
Green synthesis of silver nanoparticles using plant extracts
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The use of silver nanoparticles in the field of nanomedicine is keeping pace and innovating with the ever expanding horizon of Nanobiotechnology. Ipomea species is widely cultivated and use for different purposes, such as, nutritional, medicinal, ritual and agricultural. The present study deals with the synthesis and characterization of silver nanoparticles using methonolic extract of Ipomoea indica flowers. UV-visible spectroscopy studies were carried out to assess the formation silver nanoparticles. The formation of Ag-NPs was confirmed by Scanning Electron Microscopy (SEM) and X-Ray Diffraction (XRD) studies. SEM image revealed that silver nanoparticles are quite polydispersed, the size ranging from 10nm to 50nm. The formation of crystalline silver nanoparticles was confirmed using X-ray diffraction analysis. Extracellular synthesis of Ag nanoparticles using dried biomass appears to be cost effective, eco-friendly to that of conventional methods of nanoparticles synthesis.
Green Synthesis of Silver Nanoparticles by Plants Extract
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Contribution/Originality: This study contributes to develop the efficient green chemistry methods which have investigated synthesis of metal nanoparticles 1. INTRODUCTION Ag-NPs are much quickly developing class with 438 commercially produced nano-products in global markets [1]. It is being utilized in batteries, photography, channels [2] textures [3] catalysts [4] sensors [5] materials
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The advancement in nanoparticulate system has a great impact in many scientific areas. Metallic nanoparticles (NPs) such as silver, gold and copper were found to exhibit antibacterial and other biological activities. The phytochemical constituents (Tannins, flavonoids, terpenoids, saponins and glycosides) present in the plant extracts were used for the green synthesis of NPs of desired size and morphology. Moreover, these active molecules act as reducing and capping agents for the synthe¬sis of NPs, which makes them suitable for biomedical applications. Apart from many approach on synthesis of nanoparticles, green synthesis method becomes more preferable because of its ecofriendly and nontoxic approach. This approach might pave the path for researchers across the globe to explore the potential of different herbs in the synthesis of NPs. This chapter will discuss the synthesis of various metal NPs using plants and their phytochemical constituent's involved during the synthesis. A section devoted to the different applications will be presented.
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Nanoscale materials known as nanoparticles exhibit distinctive properties and functionalities owing to their minute size and expansive surface area. Employing plant extracts for nanoparticle synthesis represents an environmentally conscious and sustainable method that utilises natural resources as both reducing and capping agents. This comprehensive review presents the current state-of-the-art in the green synthesis of nanoparticles using plant extracts. It specifically explores the interplay between phytochemicals and metal ions, highlighting the impact of phytochemicals on various nanoparticle properties such as size, shape, morphology, crystal structure, elemental composition, surface charge and optical characteristics. The applications of these nanoparticles such as silver nanoparticles, gold nanoparticles, zinc oxide nanoparticles etc. span diverse fields, including biomedical, environmental, catalytic, optical, electrical and magnetic applications. The review also addresses challenges and future directions in this burgeoning field, emphasising the necessity for standardisation and optimisation of synthesis parameters, elucidation of the synthesis mechanism and kinetics and exploration of functionalisation and potential applications. In conclusion, the green synthesis of nanoparticles using plant extracts emerges as a promising and evolving field with considerable potential for future research and development.