Green synthesis of silver nanoparticles using Gymnema sylvestre leaf extract and evaluation of its antibacterial activity

Gomathi, M.; Prakasam, A.; Rajkumar, P.V.; Rajeshkumar, S.; Chandrasekaran, R.; Anbarasan, P. M.

doi:10.1016/j.sajce.2019.11.005

Cited by 59 publications

(43 citation statements)

References 14 publications

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“…47,48 Although these synthetic methods have produced AgNPs shaped as spheres, 49 cubes, 50 bipyramids, 51 stars, 52 nanoprisms, 53 triangular plates 53 these methods are energy-intensive, the size and shape distributions are not always homogenous, and chemicals used can be toxic. Consequently, this has given rise to alternative green synthetic approaches employing biological entities such as microorganisms 10,12,54,55 and plant extracts 4, [56][57][58][59][60][61][62][63] to replace more complex syntheses of AgNPs free from toxic capping agents and hazardous byproducts.…”

Section: Introductionmentioning

confidence: 99%

A hybrid lipid membrane coating “shape-locks” silver nanoparticles to prevent surface oxidation and silver ion dissolution

et al. 2020

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Section: Introductionmentioning

confidence: 99%

A hybrid lipid membrane coating “shape-locks” silver nanoparticles to prevent surface oxidation and silver ion dissolution

et al. 2020

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“…The phytochemicals present in plant extracts such as protein, amino acid, polyphenols, carbohydrates etc. may act as reducer and stabilization agents in the synthesis of biogenic silver nanoparticles (Gomathi et al, 2020). The presence of diverse functional groups in the capping facilitates the binding of metal ion on to the surface of silver nanoparticles.…”

Section: Introductionmentioning

confidence: 99%

Dual Colorimetric Sensor for Hg2+/Pb2+ and an Efficient Catalyst Based on Silver Nanoparticles Mediating by the Root Extract of Bistorta amplexicaulis

2020

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Environmental pollution derivated from toxic metals and organic toxins is becoming a serious issue worldwide because of their harmful effects on the ecosystem and human health. Here we are reporting an extremely selective and cost-effective colorimetric sensor for simultaneous recognition of Hg 2+ and Pb 2+ by using green synthesized silver nanoparticles (AgNPs) mediated from the environmental friendly roots extract of Bistorta amplexicaulis. Biogenic synthesized AgNPs were well-characterized by various spectroscopic techniques e.g., UV-vis, FT-IR, XRD, AFM, and Zetasizer. The photophysical potential of synthesized AgNPs toward common metal cations was explored via absorption spectroscopy and colorimetric assay. The hypsochromic shift in the SPR band of AgNPs can easily be detected through naked eyes vision from dark brown to light yellow in the case of Hg 2+. A substantial reduction in the absorbance of AgNPs was recorded upon mixing with Pb 2+. AgNPs based colorimetric sensor is highly sensitive toward Hg 2+ and Pb 2+ with a limit of detection (LOD) of 8.0 × 10 −7 M and 2.0 × 10 −7 M for Hg 2+ and Pb 2+ , respectively. Furthermore, AgNPs showed promising catalytic activity for the degradation of methyl orange dye. These results demonstrate that Bistorta amplexicaulis stabilized silver nanoparticles have potential applications as a colorimetric sensor and an effective catalyst for the degradation of methyl orange.

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“…The most used nanoparticles in biomedical application, which are gold, and silver nanoparticles are prepared by the green route (Kuppusamy et al 2015 ) (Salem and Fouda 2020 ). Using various plant extracts, mono-, di-, and tri-metallic nanoparticles were prepared but still have some limitations in the state of aggregation, stability, and crystal growth (Guimarães et al 2020 ) (Gomathi et al 2020 ).…”

Section: Nanoparticles As Antiviral Agentsmentioning

confidence: 99%

A review on recent trends of antiviral nanoparticles and airborne filters: special insight on COVID-19 virus

Jazie

Albaaji

Abed

2021

Air Qual Atmos Health

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Novel corona virus (COVID-19) pandemic in the last 4 months stimulates the international scientific community to search for vaccine of antiviral agents suitable for in activating the virus inside and outside the human body. More than 4 million people globally are infected by the virus and about 300,000 dead cases until this moment. The ventilation and airborne filters are also investigated aiming to develop an efficient antiviral filtration technology. Human secretion of the infected person as nasal or saliva droplets goes as airborne and distributes the virus everywhere around the person. N95 and N98 filters are the must use filters for capturing particles of sizes around 300 nm. The average size of the novel corona virus (COVID-19) is 100 nm and there is no standard or special filter suitable for this virus. The nanoparticle-coated airborne filter is a suitable technique in this regard. While the efficiency of this type of filters still needs to be enhanced, new developed nanofiber filters are proposed. Most recently, the charged nanofiber filters of sizes below 100 nm are developed and provide an efficient viral filtration and inactivation. The efficiency of filter must be kept at accepted level without increasing the pressure drop. The present review outlines the most efficient antiviral nanoparticles including the recent functional nanoparticles. The filtration theory, filtration modeling, filter testing, and different types of filter with special concentration on the charged nanofiber filter were discussed. The charged nanofiber filter able to capture novel corona virus (COVID-19) with 94% efficiency and a pressure drop less than 20 MPa.

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Green synthesis of silver nanoparticles using Gymnema sylvestre leaf extract and evaluation of its antibacterial activity

Cited by 59 publications

References 14 publications

A hybrid lipid membrane coating “shape-locks” silver nanoparticles to prevent surface oxidation and silver ion dissolution

A hybrid lipid membrane coating “shape-locks” silver nanoparticles to prevent surface oxidation and silver ion dissolution

Dual Colorimetric Sensor for Hg2+/Pb2+ and an Efficient Catalyst Based on Silver Nanoparticles Mediating by the Root Extract of Bistorta amplexicaulis

A review on recent trends of antiviral nanoparticles and airborne filters: special insight on COVID-19 virus

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