In:
Recent Patents on Nanotechnology, Bentham Science Publishers Ltd., Vol. 14, No. 3 ( 2020-10-26), p. 250-258
Abstract:
To use an agroindustrial waste (orange peels) as a source of polyphenols as a reducing
medium for obtaining silver nanoparticles by greener method. Background: Several techniques have been employed for AgNPs synthesis, nevertheless, most of them
involve the use of toxic chemicals in the process. The use of fungi, bacteria, and plant extracts as subtracts for green synthesis is an ecofriendly alternative, although hypothetic, route for AgNPs large
scale synthesis. In the case of plant extracts, it is believed that polyphenols are the biomolecules responsible for the reduction and stabilization of the Ag+ ions into AgNPs, being a sustainable and ecological
option; polyphenols could be obtained from plant waste and agroindustrial subproducts. Objective: To develop an efficient, greener, and low-cost method of AgNPs production using natural
products. Methods: The basic principle of silver nanoparticles synthesis is the interaction in a mixture of silver
nitrate (source of Ag+ ions) and the orange peel extract (reducing and stabilizing agent) under certain conditions. Five treatments were carried out, evaluating several parameters during AgNPs synthesis
such as pH, orange peel extract-silver nitrate ratio, time and conditions of incubation, irradiation of UV light, irradiation of microwave, and temperature. Result: The synthesis of silver nanoparticles from an agroindustrial waste as the orange peel was successfully
carried out and checked by visual evaluation, UV-Vis spectroscopy, and EDS analysis. The particle size was estimated between 42.82 nm to 151.75 nm, having a spherical and ovoid morphology. Discussion: Through the analysis of several synthesis conditions, it has become possible to establish a
suitable treatment to increase antibacterial yield and evaluate morphology and size t raits in order to acquire
the best conditions for a future industrial scale synthesis. Conclusion: The orange peel aqueous extract resulted as a great source of polyphenols, allowing the
successful synthesis of silver nanoparticles in mild conditions. Thus, obtained AgNPs revealed an increased antibacterial effect and potential against Gram-positive bacteria such as Staphyloccocus aureus.
Type of Medium:
Online Resource
ISSN:
1872-2105
DOI:
10.2174/1872210514666200414101014
Language:
English
Publisher:
Bentham Science Publishers Ltd.
Publication Date:
2020
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