Abstract
In this study, silver nanoparticles (AgNPs) were obtained using a green-chemistry procedure. For this protocol, the Carrasquilla extract (CE) (Berberis hallii) and a AgNO3 solution were used as the reducing agent and the metal precursor, respectively. The as-prepared AgNPs after characterization were then used to evaluate the degradation of the methylene blue (MB), the safranin (SF), and the mixture of both dyes in the aqueous phase under solar light irradiation. The photocatalytic activity of AgNPs for the degradation of the MB (k = 0.0092 min−1) was higher than the SF (k = 0.00016 min−1) due to the susceptibility of the thiazine ring of the MB to photodegradation contrasted to the phenyl phenazine of the SF. However, SF was mostly removed by adsorption with a maximum uptake of 2907 mg/g. Overall, this eco-friendly and green conversion of silver ions to metallic elements avoids the use of toxic chemicals and could be applied for the degradation/adsorption of dyes used in several industrial processes.
Highlights
Silver nanoparticles (AgNPs) have attracted interest in the field of environmental remediation [1,2,3,4]
A suitable extraction method able to withdraw the largest quantity of polyphenol content is essentially that one to enhance the reducing capability of the silver ions to silver nanoparticles
Silver nanoparticles prepared with this Carrasquilla extract (CE) concentration show a single surface plasmon absorption band with a maximum at 400 nm indicating the presence of spherical Ag nanoparticles
Summary
Silver nanoparticles (AgNPs) have attracted interest in the field of environmental remediation [1,2,3,4]. The chemical preparation of nanoparticles is based on the reduction of metallic salts using reducing agents that can be synthetic or from biological sources such as plant extracts [5,6,7]. These phyto extracts are the reducing agents that promote the formation of nucleation centers and the incorporation of neighboring sites into the nucleation to produce different morphologies of nanoparticles [8,9]. There has not been reported any study related to the synthesis of AgNPs nanoparticles using the Carrasquilla extract as the reducing agent and its application on the degradation or removal of organic dyes
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