Study of the effect of Persea americana seed in the green synthesis of silver nanoparticles and their antimicrobial properties

Girón-Vázquez, Nayeli G.; Gómez-Gutiérrez, C.M.; Soto-Robles, C.A.; Nava, O.; Lugo-Medina, Eder; Castrejón-Sánchez, V.H.; Vilchis-Néstor, Alfredo R.; Luque, P.A.

doi:10.1016/j.rinp.2019.02.078

Cited by 59 publications

(18 citation statements)

References 30 publications

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“…This absorption band is basically due to surface plasmon resonance of g-Ag NPs. A similar result was reported while synthesizing Ag NPs using the Persea americana seed extract [28]. Similarly, the UV-visible diffused reflectance spectrum was recorded ( figure 2(b)).…”

Section: Uv-visible Spectral Analysissupporting

confidence: 82%

Electrochemical properties of biogenic silver nanoparticles synthesized using Hagenia abyssinica (Brace) JF. Gmel. medicinal plant leaf extract

Murthy¹,

Desalegn²,

Ravikumar³

et al. 2020

Mater. Res. Express

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The biogenic/green silver nanoparticles (g-Ag NPs) were synthesised by using the extract of indigenous medicinal plant of Ethiopia, Hagenia abyssinica (Brace) JF. Gmel. leaf extract for the first time, to investigate the synergistic effect of biomolecules towards the enhancement of electrochemical properties of NPs. The synthesized g-Ag NPs were characterized by UV-visible, UV-DRS, FT-IR, XRD, SEM, EDXA, TEM, HRTEM and SAED techniques. The maximum absorbance, λ max was found to be 461 nm for g-Ag NPs due to surface plasmon resonance. The energy gap, E g of NPs, was found to be 2.31 eV. FTIR spectrum confirmed the presence of bioactive compounds responsible for possible capping and stabilisation of g-Ag NPs. The XRD analysis revealed that the g-Ag NPs are highly crystalline exhibiting sharp peaks for (111), (200), (220) and (311) planes in the diffraction pattern. SEM and TEM micrographs showed differently shaped Ag particles in addition to spherical shape. The average particle size of NPs was found to be 24.08 nm using imageJ analysis. EDX analysis confirmed the presence of Ag in the g-Ag NPs. In addition, the SAED pattern of g-Ag NPs presented concentric patterns for 4 major planes of crystalline silver. The d-spacing values of 0.2428 nm, 0.2126 nm, 0.1483 nm and 0.1263 nm corresponds to d 111 Ag, d 200 Ag, d 220 Ag and d 311 Ag lattice fringes respectively. The cyclic voltammetry (CV) results suggest that g-Ag NPs possess better electrochemical properties due to its lower charge transfer resistance value of 17 Ω. EIS studies too revealed better stability of g-Ag NPs as electrode materials.

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Section: Uv-visible Spectral Analysissupporting

confidence: 82%

Electrochemical properties of biogenic silver nanoparticles synthesized using Hagenia abyssinica (Brace) JF. Gmel. medicinal plant leaf extract

Murthy¹,

Desalegn²,

Ravikumar³

et al. 2020

Mater. Res. Express

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“…Table 1 shows a brief comparison between the AgNPs synthesized in the present work and those reported previously 24,28–31 . As can be seen, the proposed method allows AgNPs with small particle size to be obtained, being fully comparable to the published methodologies, even when conventional or green procedures are applied.…”

Section: Resultssupporting

confidence: 52%

Green‐tea‐synthesized silver nanoparticles as a sensing platform for determination of tetracycline in honey samples

2021

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BACKGROUND Silver nanoparticles (AgNPs) can be easily obtained in aqueous solution by chemical reduction using appropriate reducing agents and stabilizers. The development of environmentally friendly methods using non‐toxic solvents and reagents has become an alternative for the synthesis of these particles and their future application as sensor probes for agricultural products. In this work, a straightforward method based on green tea extracts as reducing and capping agent is proposed for the synthesis of AgNPs, followed by their evaluation as a sensing platform for determination of tetracycline in honey samples. RESULTS Highly stable nanoparticles were easily obtained by combining green tea aqueous extracts and ultrasound irradiation for 2 min. The as‐synthesized AgNPs, spherical in shape and with average size of 8.5 nm, were evaluated for determination of tetracycline by following the changes on the localized surface plasmon resonance band at 450 nm induced by the presence of this antibiotic at pH 5.8. The method was successfully applied in the concentration range between 200 and 800 μg L−1 with R2 > 0.996 and limit of detection of 52.7 μg L−1. Multiple honey samples were analyzed, and the recovery values obtained ranged between 82.8% and 116%, with relative standard deviation values lower than 6.69%. CONCLUSION The results obtained demonstrate that the AgNPs synthesized using just green tea extracts represent a promising and sustainable alternative tool for the cost‐effective determination of tetracycline antibiotics in honey. © 2021 Society of Chemical Industry

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“…The cytotoxic effect of green synthesised AgNPs was evaluated by MTT assay against HeLa, MCF-7 and fibroblast normal cell lines exposed to different concentrations (2,5,10,25,50,100,150,200, 250 and 400 mg/ml) of AgNPs (Figure 9). AgNPs showed dose dependent cytotoxicity effect on all the three cell lines; all the three cell lines showed strong negative correlation between % cell viability and concentration of AgNPs; as concentration of AgNPs increased, the % cell viability decreased.…”

Section: Cytotoxic Effectmentioning

confidence: 99%

Facile green synthesis of silver nanoparticles using Mangifera indica seed aqueous extract and its antimicrobial, antioxidant and cytotoxic potential (3-in-1 system)

Donga

Chanda

2021

Artificial Cells, Nanomedicine, and Biotechnology

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A novel approach for the utilisation of fruit waste is attempted in the present investigation. Mangifera indica seed aqueous extract was utilised for green synthesis of silver nanoparticles (AgNPs). The phytoconstituents in the seed acted as reducing and stabilising agent for AgNP formation. UV-Vis, Zeta potential, FT-IR, XRD, TEM, SAED, EDX analysis were used to characterise the green synthesised AgNPs. UV-vis spectra showed characteristic spectra at 450 nm; XRD and SAED confirmed the crystalline nature while TEM revealed the shape to be round and average size was 26.85 nm. FT-IR revealed functional groups like alcohol or phenols, carboxylic acids, ketones, amines, aromatic amines, aliphatic amines, alkyl halides and alkynes which were responsible for AgNP formation. The nanoparticles showed more antibacterial activity than antifungal activity and antibacterial activity towards Gram-negative bacteria was more than Gram-positive bacteria. Dose dependent antioxidant activity (DPPH, SO and ABTS) and dose dependent cytotoxic effect against HeLa, MCF-7 and normal fibroblast cell lines was envisaged. The green synthesised AgNPs exhibited three different bioactivities (3-in-1 system) i.e. dose dependent antimicrobial, antioxidant and cytotoxic activity. Fruit waste can be successfully utilised for silver nanoparticles formation which can be therapeutically useful and effective. HIGHLIGHTS Silver nanoparticles were synthesised from M. indica fruit waste i.e. seed Characterisation by spectroscopic techniques: UV-Vis, Zeta, FTIR, XRD, SAED, EDX and TEM analysis. Silver nanoparticles were 26.85 nm in size and round in shape Antimicrobial activity against 14 microorganisms Antioxidant activity in terms of DPPH, SO and ABTS Cytotoxic activity against HeLa, MCF-7 and Fibroblast normal cell lines ARTICLE HISTORY

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Study of the effect of Persea americana seed in the green synthesis of silver nanoparticles and their antimicrobial properties

Cited by 59 publications

References 30 publications

Electrochemical properties of biogenic silver nanoparticles synthesized using Hagenia abyssinica (Brace) JF. Gmel. medicinal plant leaf extract

Electrochemical properties of biogenic silver nanoparticles synthesized using Hagenia abyssinica (Brace) JF. Gmel. medicinal plant leaf extract

Green‐tea‐synthesized silver nanoparticles as a sensing platform for determination of tetracycline in honey samples

Facile green synthesis of silver nanoparticles using Mangifera indica seed aqueous extract and its antimicrobial, antioxidant and cytotoxic potential (3-in-1 system)

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