Biogenic synthesis and antibacterial activity of controlled silver nanoparticles using an extract of Gongronema Latifolium

Aisida, Samson O.; Ugwu, Kenneth; Akpa, Paul A.; Nwanya, Assumpta C.; Ejikeme, Paul M.; Botha, Subelia; Ahmad, Ishaq; Mâaza, M.; Ezema, Fabian I.

doi:10.1016/j.matchemphys.2019.121859

Cited by 105 publications

(28 citation statements)

References 47 publications

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“…The strong SPR absorption band might be due to the SPR band of Cu colloids and the formation of NPs [36]. UV/Vis spectrum of Ag-NPs showed characteristic SPR absorption peak at 426 nm (Fig 5C), as compare with the previous study [23]. The increases in SPR absorption peak with respect to time indicating polydispersity nature of the Ag-NPs [37].…”

Section: Plos Onesupporting

confidence: 53%

“…Green nanotechnology has become most popular over the chemical techniques as a facile, economical, environment-pleasant, readily scaled up, without high temperature, pressure and energy, biocompatible, without using toxic and redundant chemicals and safe for human therapeutic uses. Various plants leaves extracts such as Gongronema Latifolium , Moringa oleifera , bitter leave ( Veronica amygdalina) , Psidium guajava have been utilized for the biosynthesis of metal NPs [ 23 – 26 ]. The flavonoids, phenolics, polysaccharides and terpenoids are the secondary metabolites present in the plant that are accountable primarily for the metal ions reduction into bulk metallic NPs preparation in the redox reaction to obtain nano-sized NPs that are non-toxic by transforming M + to M 0 and also act as a capping agent of the obtained NPs [ 25 ].…”

Section: Introductionmentioning

confidence: 99%

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Facile, one-pot biosynthesis and characterization of iron, copper and silver nanoparticles using Syzygium cumini leaf extract: As an effective antimicrobial and aflatoxin B1 adsorption agents

et al. 2020

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In this study, a facile, ecological and economical green method is described for the fabrication of iron (Fe), copper (Cu) and silver (Ag) nanoparticles (NPs) from the extract of Syzygium cumini leaves. The obtained metal NPs were categorized using UV/Vis, SEM, TEM, FTIR and EDX-ray spectroscopy techniques. The Fe-, Cu-and Ag-NPs were crystalline, spherical and size ranged from 40−52, 28−35 and 11−19 nm, respectively. The Ag-NPs showed excellent antimicrobial activities against methicillin-and vancomycin-resistance Staphylococcus aureus bacterial strains and Aspergillus flavus and A. parasiticus fungal species. Furthermore, the aflatoxins (AFs) production was also significantly inhibited when compared with the Fe-and Cu-NPs. In contrast, the adsorption results of NPs with aflatoxin B 1 (AFB 1) were observed as following order Fe->Cu->Ag-NPs. The Langmuir isotherm model well described the equilibrium data by the sorption capacity of Fe-NPs (105.3 ng mg-1), Cu-NPs (88.5 ng mg-1) and Ag-NPs (81.7 ng mg-1). The adsorption was found feasible, endothermic and follow the pseudo-second order kinetic model as revealed by the thermodynamic and kinetic studies. The present findings suggests that the green synthesis of metal NPs is a simple, sustainable, non-toxic, economical and energy-effective as compared to the others conventional approaches. In addition, synthesized metal NPs might be a promising AFs adsorbent for the detoxification of AFB 1 in human and animal food/feed.

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Section: Plos Onesupporting

confidence: 53%

Section: Introductionmentioning

confidence: 99%

Facile, one-pot biosynthesis and characterization of iron, copper and silver nanoparticles using Syzygium cumini leaf extract: As an effective antimicrobial and aflatoxin B1 adsorption agents

et al. 2020

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“…Fabrication of nanoparticles using extracts from plants as potential capping and reducing agents is often known as green synthesis. The extracts from leaves, fruit, roots, and seeds of the plants can influence the properties of the formulated nanoparticles by enhancing their functionality optimally for biomedical applications [ 50 – 52 ]. Much work has been conducted using a green synthesis approach to tailor the properties of nanoparticles.…”

Section: Introductionmentioning

confidence: 99%

Role of capping agents in the application of nanoparticles in biomedicine and environmental remediation: recent trends and future prospects

et al. 2020

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Capping agents are of utmost importance as stabilizers that inhibit the over-growth of nanoparticles and prevent their aggregation/coagulation in colloidal synthesis. The capping ligands stabilize the interface where nanoparticles interact with their medium of preparation. Specific structural features of nanoparticles are attributed to capping on their surface. These stabilizing agents play a key role in altering the biological activities and environmental perspective. Stearic effects of capping agents adsorbed on the surface of nanoparticles are responsible for such changing physico-chemical and biological characteristics. Firstly, this novel review article introduces few frequently used capping agents in the fabrication of nanoparticles. Next, recent advancements in biomedicine and environmental remediation approaches of capped nanoparticles have been elaborated. Lastly, future directions of the huge impact of capping agents on the biological environment have been summarized.

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“…Silver nanoparticles (AgNPs) are among the noble metals studied extensively due to their unique physical and chemical properties. They have found application in areas such as water and air purifiers, imaging, textiles, sensors, energy sector, antibacterial products and anticancer agents [1][2][3][4]. AgNPs have strong optical absorption which is attributed to intra-band quantum excitations of the conduction electrons making them good candidates for technological applications, for instance in surface enhanced resonance Raman scattering [5] optical biosensor and photo-catalysis.…”

Section: Introductionmentioning

confidence: 99%

Antibacterial effect of silver nanoparticles synthesised on a polycarbonate membrane

Sackey

Fell

Ngilirabanga

et al. 2021

Materials Today: Proceedings

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This work reports for the first time the possibility of green synthesis and the antibacterial effect of silver nanoparticles (AgNPs) on commercialized polycarbonate membrane. The AgNPs were loaded on the polycarbonate membrane serving as the substrate via ultra-sonication and centrifugation. The extracts from the red flowers of Callistemon viminalis were used as the chelating agent. The synthesised thin film silver nanoparticles were characterized by various techniques such as Scanning Electron Microscope (SEM), Energy Dispersive X-ray spectroscopy (EDX), Fourier transform-infrared (FT-IR), X-Ray diffraction and UV-Vis spectroscopy. Consequently, the antibacterial affect was studied. The synthesised thin film silver nanoparticles had a surface plasmon resonance of 310nmand show a very effective inhibition growth of both Gram-positive and Gram-negative.

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Biogenic synthesis and antibacterial activity of controlled silver nanoparticles using an extract of Gongronema Latifolium

Cited by 105 publications

References 47 publications

Facile, one-pot biosynthesis and characterization of iron, copper and silver nanoparticles using Syzygium cumini leaf extract: As an effective antimicrobial and aflatoxin B1 adsorption agents

Facile, one-pot biosynthesis and characterization of iron, copper and silver nanoparticles using Syzygium cumini leaf extract: As an effective antimicrobial and aflatoxin B1 adsorption agents

Role of capping agents in the application of nanoparticles in biomedicine and environmental remediation: recent trends and future prospects

Antibacterial effect of silver nanoparticles synthesised on a polycarbonate membrane

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