Green Synthesis of Gold and Silver Nanoparticles Using<i>Averrhoa bilimbi</i>Fruit Extract

Isaac, R. S. Rimal; Sakthivel, G; Murthy, Ch. S.S.S.

doi:10.1155/2013/906592

Cited by 107 publications

(56 citation statements)

References 25 publications

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“…This could be due to the excitation of nanoparticles from ground state to excited state [8]. The increasing concentration of leaf extract enhanced the phytochemical content of the extract and it can reduce the precursor quickly which leads to increasing the formation of nanoparticles rapidly and enhancing the absorbance value [19]. Actual band gap wavelength of zinc oxide and iron oxide was 388 nm and 370 nm, respectively, which was higher than 235 nm and 220 nm (Figures 1 and 2) which may be due to agglomeration and settling of nanoparticles in a cuvette which cause decreasing the absorption of radiation.…”

Section: Uv-visiblementioning

confidence: 99%

Synthesis and Characterization of Zinc Oxide and Iron Oxide Nanoparticles Using Sesbania grandiflora Leaf Extract as Reducing Agent

Rajendran¹,

Sengodan²

2017

Journal of Nanoscience

169

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The objectives of this present study are to synthesize iron oxide and zinc oxide nanoparticles from different concentrations of Sesbania grandiflora leaf extract (5-20%) using zinc nitrate and ferrous chloride as precursor materials and synthesized nanoparticles were characterized using UV-visible spectrometer, FTIR, X-ray diffraction, and SEM. The results showed that synthesized zinc oxide and iron oxide nanoparticles exhibited UV-visible absorption peaks at 235 nm and 220 nm, respectively, which indicated that both nanoparticles were photosensitive and the XRD study confirmed that both nanoparticles were crystalline in nature. In addition, FTIR was also used to analyze the various functional groups present in the synthesized nanoparticles. The SEM results reveal that zinc oxide nanoparticles were spherical in shape and having the particle size range of 15 to 35 nm whereas the iron oxide nanoparticles were nonspherical in shape with the size range of 25 to 60 nm. Application of synthesized nanoparticle on seafood effluent treatment was studied.

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Section: Uv-visiblementioning

confidence: 99%

Synthesis and Characterization of Zinc Oxide and Iron Oxide Nanoparticles Using Sesbania grandiflora Leaf Extract as Reducing Agent

Rajendran¹,

Sengodan²

2017

Journal of Nanoscience

169

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“…Gold and silver nanoparticles have received special attention because they have found potential application in many fields of chemistry, physics, and biology because they possess an excellent biocompatibility and low toxicity and also because of their unique optical, electrical, and photothermal properties (Perez 2010;Isaac et al 2013).…”

Section: Introductionmentioning

confidence: 99%

Impact of gold nanoparticles on brain of mice infected with Schistosoma mansoni

et al. 2015

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Schistosomiasis is a condition characterized by high rates of morbidity and cognitive impairment. It afflicts many people in tropical and sub-tropical countries. Our study aimed to investigate the protective role of gold nanoparticles (GNPs) on the brain of mice infected with Schistosoma mansoni. Characterizations of GNPs were determined by using high-resolution transmission electron microscopy. Three doses of GNPs (0.25, 0.5, and 1.0 mg/kg body weight) were used to treat animals after S. mansoni infection. The infection induced impairments in histological picture as a result of schistosome infection resulting in a disturbance in the content of the brain neurotransmitters, norepinephrine (NE), and dopamine (DA). Also, the infection induced significant reduction in glutathione level; oppositely, the levels of nitric oxide and malondialdehyde were increased significantly. In addition, S. mansoni was able to disregulate the infected mice brain Cacnb4, Cabp4, Vdac3, Glrb, and Adam23 messenger RNA (mRNA). On the other hand, treatment of mice with GNPs could alleviate the histological impairments, the changes in the content of NE and DA, and the brain oxidative damage. Also, GNPs could regulate the gene expression due to S. mansoni infection. Generally, GNPs could decrease the neurooxidative stress and regulated the gene expression in the brain of infected mice. Consequently, our results revealed an anti-neuroschistosomal effect of GNPs in mice infected with S. mansoni.

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“…A band at 1,072 cm -1 may indicate stretching of C-N bonds that exist in amines whereas the band at 3,296 cm -1 denotes the O-H stretching of aromatic compounds like phenol. (Isaac et al 2013). The band observed at 2,929 cm -1 may correspond to the C-H stretching of aldehydes and a band at 1,539 cm -1 indicates the bending of C-H bonds present in hydrocarbons as well (Sathyavathi et al 2010).…”

Section: Tem Analysismentioning

confidence: 99%

Photocatalytic activity of biogenic silver nanoparticles synthesized using yeast (Saccharomyces cerevisiae) extract

2014

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Synthesis of metallic and semiconductor nanoparticles through physical and chemical route is quiet common but biological synthesis procedures are gaining momentum due to their simplicity, cost-effectivity and ecofriendliness. Here, we report green synthesis of silver nanoparticles from aqueous solution of silver salts using yeast (Saccharomyces cerevisiae) extract. The nanoparticles formation was gradually investigated by UV-Vis spectrometer. X-ray diffraction analysis was done to identify different phases of biosynthesized Ag nanoparticles. Transmission electron microscopy was performed to study the particle size and morphology of silver nanoparticles. Fourier transform infrared spectroscopy of the nanoparticles was performed to study the role of biomolecules capped on the surface of Ag nanoparticles during interaction. Photocatalytic activity of these biosynthesized nanoparticles was studied using an organic dye, methylene blue under solar irradiation and these nanoparticles showed efficacy in degrading the dye within a few hours of exposure.

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Green Synthesis of Gold and Silver Nanoparticles UsingAverrhoa bilimbiFruit Extract

Cited by 107 publications

References 25 publications

Synthesis and Characterization of Zinc Oxide and Iron Oxide Nanoparticles Using Sesbania grandiflora Leaf Extract as Reducing Agent

Synthesis and Characterization of Zinc Oxide and Iron Oxide Nanoparticles Using Sesbania grandiflora Leaf Extract as Reducing Agent

Impact of gold nanoparticles on brain of mice infected with Schistosoma mansoni

Photocatalytic activity of biogenic silver nanoparticles synthesized using yeast (Saccharomyces cerevisiae) extract

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