Ag/AgO nanoparticles: Green synthesis and investigation of their bacterial inhibition effects

Abdalameer, Nisreen Kh.; Khalaph, Kawther A.; Ali, Ehab M.

doi:10.1016/j.matpr.2021.03.166

Cited by 23 publications

(11 citation statements)

References 21 publications

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“…Tauc’s plot was drawn to compute the optical band gap of leaf and fruit-mediated nanosized particles by applying the equation ( α h ν ) 1 / n = A .25em ( h ν − E g ) wherein α denotes the coefficient of absorption, h ν denotes photon energy, A is taken as a proportionality constant, E g represents the energy of the optical band gap, and n represents electronic transitions, wherein n = 1/2 shows the direct optical band gap transitions. Moreover, the (α h ν) versus E g graph, as displayed in Figure c, d, suggests the optical direct bandgap energy of AgNPs as 2.58 and 2.12 eV utilizing leaf extract (see Figure c) and fruit-pulp extract (see Figure d), respectively: these energies are compatible with the values in the existing literature, which are 2.9 and 3.4 eV . The difference in the optical band gap energy values may be observed due to other phenomena, such as quantum confinement effects …”

Section: Resultssupporting

confidence: 87%

“…Moreover, the (αhν) 2 versus E g graph, as displayed in Figure 6c, d, suggests the optical direct bandgap energy of AgNPs as 2.58 and 2.12 eV utilizing leaf extract (see Figure 6c) and fruit-pulp extract (see Figure 6d), respectively: these energies are compatible with the values in the existing literature, which are 2.9 46 and 3.4 eV. 47 The difference in the optical band gap energy values may be observed due to other phenomena, such as quantum confinement effects. 48…”

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confidence: 88%

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Biosynthesizing Cassia fistula Extract-Mediated Silver Nanoparticles for MCF-7 Cell Lines Anti-Cancer Assay

et al. 2023

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The unique consequence of green synthesis is that the mediator plant is able to release chemicals that are efficacious as reducing as well as stabilizing agents. In this work, the fruit pulp and leaf essences of Cassia fistula have been used to manufacture silver nanoparticles through the green synthesis technique. The sculpturing of nanoparticles was accomplished by utilizing the reduction phenomenon that ensued due to the reaction between plant essences and the precursor solution. These biosynthesized silver nanoparticles were examined, where we used scanning electron microscopy, UV−vis spectroscopy, and X-ray diffraction techniques as means to analyze the structure, optical properties, and crystalline behavior, respectively. The absorption spectra for fruit and leaf extracts obtained from the UV−vis analyses peaked at 401 and 397 nm, and these peaks imply the appearance of optical energy gaps of 2.12 and 2.58 eV, accompanying spherical shapes of particles with diameters in the ranges of 12−20 and 50−80 nm, respectively. These silver nanoparticles together with the adopted green technique have a vast array of applications, specifically in the biomedical realm. In particular, they are being used to treat several diseases and are manifested as strong anti-tumor agents to medicate MCF-7 breast cancer cell lines in order to minimize the cell growth rate depending on their concentrations.

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Section: Resultssupporting

confidence: 87%

supporting

confidence: 88%

Biosynthesizing Cassia fistula Extract-Mediated Silver Nanoparticles for MCF-7 Cell Lines Anti-Cancer Assay

et al. 2023

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“…where α represents the absorption coefficient, hν is the photon energy, A is a constant, and E g is the optical bandgap energy, respectively, while n depends on electron transitions, and n = 2 corresponds to direct electron transitions with a direct optical bandgap. The graph between (αhν) 2 and E g , as shown in Figure 5c,d, estimates the optical bandgap energy of synthesized AgNPs as 2.97 eV and 2.88 eV using leaf (Figure 5c) and fruit extracts (Figure 5d), respectively, which are comparable with existing literature at 2.9 eV [47], and 3.4 eV [48]. These results are more significant, and minor variations in the optical bandgap may be attributable to quantum confinement effects [49].…”

Section: Uv-vis Spectroscopy Analysissupporting

confidence: 86%

Biosynthesis and Characterizations of Silver Nanoparticles from Annona squamosa Leaf and Fruit Extracts for Size-Dependent Biomedical Applications

Malik

Iqbal

Malik³

et al. 2022

Nanomaterials

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Green synthesis differs in the way that the plant produces chemicals that act as reducing and stabilizing agents, and by adopting this green synthesis, we have synthesized silver nanoparticles (AgNPs) from the leaf and fruit extracts of Annona squamosa (also known as Sharifa), where these extracts have played an important role as reducing and capping agents. The nanoparticles were synthesized as the consequence of a reduction that happened between plant extracts and the precursor solution. The prepared AgNPs were then characterized using scanning electron microscopy, UV-Visible spectroscopy, and X-ray diffraction to study their morphology, optical response, and crystallinity. A single distinctive absorption peak of colloidal AgNPs samples was observed at 430 nm and 410 nm for leaf and fruit extract samples, having an optical bandgap of 2.97 eV and 2.88 eV, respectively, with a spherical shape having a diameter in the range of 35–90 nm and 15–50 nm, respectively, whilst XRD studies supported the FCC cubic structure of the mediated AgNPs. These green synthesized AgNPs have a wide variety of uses, particularly in the biomedical domain, where they have the potential to treat numerous diseases and are reported to be efficient against antibacterial, anti-cancer, and anti-diabetic activities.

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“…The findings indicated that the coordination between them possibly reduced the crystallinity of the PAN fiber, while a crystalline AO-PAN silver complex was formed concurrently on the PAN fiber surface. More importantly, three peaks located at 32.32°, 46.15°, and 57.39° were similar to the characteristic peaks of AgO, , suggesting that the crystal structure of the obtained Ag-AO-PAN was partially similar to that of the AgO.…”

Section: Resultsmentioning

confidence: 66%

Modified Polyacrylonitrile Fiber Silver Complexes To Display Semiconducting Behavior: Synthesis, Characterization, and Photocatalytic Oxidative Capacity

Yan

Dong

et al. 2023

Ind. Eng. Chem. Res.

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To obtain a polymer silver complex photocatalyst with good stability and semiconducting behavior, polyacrylonitrile (PAN) fibers were amidoximated and then reacted with Ag(I) ions for the preparation of amidoximated PAN fiber Ag complexes (Ag-AO-PAN) in this present study. The effect of Ag(I) ion concentration, reaction temperature, and others on Ag content of the resulting complex was examined. On the basis of several characterizations, Ag-AO-PAN was employed as the semiconductor photocatalyst for the oxidative decomposition of Rhodamine B dye (RhB) to evaluate its photocatalytic oxidation capacity under LED visible irradiation. Additionally, the photocatalytic activity of Ag-AO-PAN was compared with that of a modified PAN fiber Fe complex (Fe-AO-PAN) or Ag3PO4 photocatalyst. The experimental results demonstrated that the Ag content of Ag-AO-PAN could be enhanced by increasing Ag(I) ion concentration or coordination temperature. Ag-AO-PAN showed the crystal structure feature and displayed n type semiconducting behavior. The visible adsorption property of the complex was significantly improved through increasing its Ag content. Ag-AO-PAN could lead to a decomposition of RhB molecules in water without H2O2 under LED visible irradiation, which was found when it was replaced by Fe-AO-PAN under the same conditions. In addition, it exhibited better photocatalytic oxidative capacity and anti-photocorrosion performance than Ag3PO4 under similar conditions.

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Ag/AgO nanoparticles: Green synthesis and investigation of their bacterial inhibition effects

Cited by 23 publications

References 21 publications

Biosynthesizing Cassia fistula Extract-Mediated Silver Nanoparticles for MCF-7 Cell Lines Anti-Cancer Assay

Biosynthesizing Cassia fistula Extract-Mediated Silver Nanoparticles for MCF-7 Cell Lines Anti-Cancer Assay

Biosynthesis and Characterizations of Silver Nanoparticles from Annona squamosa Leaf and Fruit Extracts for Size-Dependent Biomedical Applications

Modified Polyacrylonitrile Fiber Silver Complexes To Display Semiconducting Behavior: Synthesis, Characterization, and Photocatalytic Oxidative Capacity

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