Green synthesis and characterization of graphene nanosheets

Tavakoli, Farnosh; Salavati‐Niasari, Masoud; Badiei, Alireza; Mohandes, Fatemeh

doi:10.1016/j.materresbull.2014.11.045

Cited by 209 publications

(55 citation statements)

References 36 publications

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“…Vibrational frequencies at 1025, 1590, 2933 cm −1 , etc., observed in the spectra of Ag/AgCl NPs and plant extract could be ascribed to the phytochemical compounds in the plant extracts which were not only responsible for the biosynthesis of Ag/AgCl NPs, but also acted as capping and stabilizing agents. This indicated that some of the residual moieties of the phytochemical compounds in the plant extract encapsulated the Ag/AgCl NPs, acting as capping and stabilizing agents [38]. Furthermore, a broad peak at 3454 cm −1 could be attributed to N-H stretching vibration of group NH 2 and OH, in both O. genistifolia leaf extract and the Ag/AgCl NPs.…”

Section: Resultsmentioning

confidence: 99%

Phytofabrication of Silver/Silver Chloride Nanoparticles Using Aqueous Leaf Extract of Oedera genistifolia: Characterization and Antibacterial Potential

et al. 2019

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In this present study, silver nanoparticles (Ag/AgCl NPs) were synthesized using an aqueous leaf extract of Oedera genistifolia as a reducing agent. The biosynthesized Ag/AgCl NPs was characterized by UV-visible spectrophotometry, transform infrared spectroscopy (FTIR), scanning electron microscopy (SEM), energy dispersive X-ray spectroscopy (EDX), transmission electron microscopy (TEM), X-ray diffraction (XRD), and thermogravimetric analysis (TGA). In addition, sequel to antibacterial assay, the cytotoxic effect of the phytofabricated Ag/AgCl NPs was assessed against the HeLa cell line (human cervix adenocarcinoma). The results of the characterization of the synthesized Ag/AgCl NPs indicate the successful synthesis using plant extract as a reducing agent, with UV-Vis spectra between 290–360 nm. TEM results showed that Ag/AgCl NPs was spherical in shape with an average size of 34.2 nm. EDX analysis revealed that the particles were predominantly composed of carbon, oxygen, chlorine, and silver, while FTIR identified major phytochemical compounds, which could be responsible for bio-reducing and capping potential. XRD analysis showed the crystallinity of Ag/AgCl NPs, with a face-centred cubic structure. The studied Ag/AgCl NPs had no cytotoxic effect on HeLa cells and exhibited antibacterial activity (minimum inhibitory concentration (MIC) 0.25–1 mg/mL; minimum bactericidal concentration (MBC) 2–16 mg/mL) against both the Gram-negative and Gram-positive bacteria investigated. Findings from this study suggest that this plant as a good candidate for producing new antibacterial drugs.

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Section: Resultsmentioning

confidence: 99%

Phytofabrication of Silver/Silver Chloride Nanoparticles Using Aqueous Leaf Extract of Oedera genistifolia: Characterization and Antibacterial Potential

et al. 2019

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“…The various biomolecules present in the plant extract such as enzymes, proteins, flavonoids, terpenoids and cofactors act as both reducing and capping agents (Tavakoli et al, 2015). The plant-mediated synthesis of nanoparticles is relatively fast as there is no need of maintaining specific media and culture conditions, unlike microbial synthesis.…”

Section: Introductionmentioning

confidence: 99%

Green biosynthesis of silver nanoparticles using Calliandra haematocephala leaf extract, their antibacterial activity and hydrogen peroxide sensing capability

Selvaraj

Vinayagam

Varadavenkatesan

2017

Arabian Journal of Chemistry

304

111

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In recent times, plant-mediated synthesis of nanoparticles has garnered wide interest owing to its inherent features such as rapidity, simplicity, eco-friendliness and cheaper costs. For the first time, silver nanoparticles were successfully synthesized using Calliandra haematocephala leaf extract in the current investigation. The as-formed silver nanoparticles were characterized by UV-Vis spectrophotometer and the characteristic surface plasmon resonance peak was identified to be 414 nm. The morphology of the silver nanoparticles was characterized by scanning electron microscopy (SEM) and energy dispersive spectroscopy (EDS) was used to detect the presence of elemental silver. X-ray diffraction (XRD) was employed to ascertain the crystalline nature and purity of the silver nanoparticles which implied the presence of (1 1 1) and (2 2 0) lattice planes of the face centered cubic (fcc) structure of metallic silver. Fourier transform infrared spectroscopy (FTIR) was used to key out the specific functional groups responsible for the reduction of silver nitrate to form silver nanoparticles and the capping agents present in the leaf extract. The stability of the silver nanoparticles was analyzed by zeta potential measurements. A negative zeta potential value of À17.2 mV proved the stability of the silver nanoparticles. The antibacterial activity against Escherichia coli -pathogenic bacteria -and the capacity to detect hydrogen peroxide by the silver nanoparticles were demonstrated which would find applications in the development of new antibacterial drugs and new biosensors to detect the presence of hydrogen peroxide in various samples respectively. ª 2015 The Authors. Production and hosting by Elsevier B.V. on behalf of King Saud University. This is an open access article under the CC BY-NC-ND license (http://creativecommons.org/licenses/by-nc-nd/4.0/).

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“…The magnesium aluminate nanosheets synthesize via sol‐gel combustion approach with nitrate salts show strong and sharp peaks in the region aluminum‐oxygen and magnesium‐oxygen stretching. The bands around 1640 cm −1 and 3465 cm −1 are assigned to the bending and stretching of vibrations of the adsorbed surface molecular water interacting with magnesium aluminate, which is caused by metal⋅H−O (M = magnesium and aluminum) hydrogen‐bonding interactions with the surface of magnesium aluminate [45–50].…”

Section: Resultsmentioning

confidence: 99%

Triethanolamine assisted sol‐gel approach for obtaining two‐dimensional magnesium aluminate nanosheets

Sharifi

Shakeri

Sadrnia

et al. 2021

Materialwissenschaft Werkst

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Aqueous‐phase synthetic route was applied for the preparation of magnesium aluminate spinel nanosheets with two‐dimensional nanostructure through a sol‐gel combustion approach, where triethanolamine was employed as a complexing agent and fuel. Results demonstrate that the as‐synthesized two‐dimensional nanosheets are well crystallized and show high purity. The pure magnesium aluminate nanoparticles with an average crystallite size of 25 nanometers were obtained at 1200 °C. Also, the two‐dimensional magnesium aluminate powder contain nanosheets with thicknesses in the 20 nanometers–30 nanometers range, and the lateral size is in the range of ∼10 micrometers–30 micrometers.

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Green synthesis and characterization of graphene nanosheets

Cited by 209 publications

References 36 publications

Phytofabrication of Silver/Silver Chloride Nanoparticles Using Aqueous Leaf Extract of Oedera genistifolia: Characterization and Antibacterial Potential

Phytofabrication of Silver/Silver Chloride Nanoparticles Using Aqueous Leaf Extract of Oedera genistifolia: Characterization and Antibacterial Potential

Green biosynthesis of silver nanoparticles using Calliandra haematocephala leaf extract, their antibacterial activity and hydrogen peroxide sensing capability

Triethanolamine assisted sol‐gel approach for obtaining two‐dimensional magnesium aluminate nanosheets

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