Green and eco-friendly synthesis of cobalt-oxide nanoparticle: Characterization and photo-catalytic activity
TL;DR: In this paper, P granatum peel extract from cobalt nitrate hexahydrate at low temperature was used for the synthesis of cobalt-oxide nanoparticles for photo-catalytic applications.
About: This article is published in Advanced Powder Technology.The article was published on 2017-09-01. It has received 189 citations till now. The article focuses on the topics: Cobalt oxide & Fourier transform infrared spectroscopy.
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TL;DR: The effective use of the sorption properties of different clays as sorbents for the removal of dyes from wastewater has currently received much attention because of the eco-friendly nature of clay materials as mentioned in this paper.
562 citations
TL;DR: In this paper, a semi spherical Fe2O3 NPs were synthesized using pomegranate (Punica granatum) seeds extract using green route and characterized by UV-vis, XRD, EDX, SEM and AFM techniques.
Abstract: Iron oxide nanoparticles (Fe2O3 NPs) were fabricated through green route using pomegranate (Punica granatum) seeds extract. The Fe2O3 NPs were characterized by UV–vis, XRD, EDX, SEM and AFM techniques. The adopted green rout furnished semi spherical Fe2O3 NPs, uniformly distributed and particle size in the range of 25–55 nm. The LCMS/MS was performed for the identification of biomolecule present in the extract of pomegranate seeds and p-hydroxy benzoic acid, gallic acid, methyl gallate, catechin, kaempferol-3-O-sophoroside, 3-deoxyflavonoids, magnolol, ferulic acid, vanillic acid and pinocembrin along with other minor constituents were detected in the extracts using for Fe2O3 NPs. The synthesized Fe2O3 NPs showed excellent photocatalytic activity against reactive blue under UV light irradiation and maximum degradation of 95.08% was achieved with 56 min of reaction time. In view of promising activity, the Fe2O3 NPs could be used photocatalyst for the degradation of dyes in wastewater and pomegranate seeds extract can be applied as eco-benign and cost effective approach for Fe2O3 NPs synthesis.
200 citations
Cites background from "Green and eco-friendly synthesis of..."
...[13] Bibi I, Nazar N, Iqbal M, Kamal S, Nawaz H, Nouren S, et al....
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TL;DR: In this paper, a review of bio-inspired nanomaterials and their use as sustainable photocatalysts for degrading various venomous pollutants is presented and the concerns, challenges and future opportunities are also included in this review.
180 citations
TL;DR: Nano scaled iron oxide particles synthesized from hexahydrate ferric chloride with the addition of papaya (Carica papaya) leaf extract showed moderate antibacterial activity and the cytotoxic effect of nanoparticles against Hela, BHK-21 and Vero cell line was found to be toxic at maximum doses.
168 citations
TL;DR: In this article, the photocatalytic activity (PCA) of manganese nanoparticles was evaluated by degrading Congo Red (CR) dye, which indicated the antimicrobial activity of biosynthesized MnNPs against Staphylococcus aureus (S.aureus) and Escherichia coli (E.coli) strains.
140 citations
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05 Oct 2014
TL;DR: In this paper, the authors present a survey of optical spectra of Elemental Metal Clusters and Chain Aggregates and discuss experimental results and experimental methods for metal clustering experiments.
Abstract: 1. Introduction.- 2. Theoretical Considerations.- 3. Experimental Methods.- 4. Experimental Results and Discussion.- A.1 Tables: Optical Spectroscopy Experiments with Metal Clusters.- A.2 Survey of Optical Spectra of Elemental Metal Clusters and Chain-Aggregates.- A.3 Mie Computer Program.- References.
6,405 citations
TL;DR: While nanorods with a higher aspect ratio along with a smaller effective radius are the best photoabsorbing nanoparticles, the highest scattering contrast for imaging applications is obtained from nanorod of high aspect ratio with a larger effective radius.
Abstract: The selection of nanoparticles for achieving efficient contrast for biological and cell imaging applications, as well as for photothermal therapeutic applications, is based on the optical properties of the nanoparticles. We use Mie theory and discrete dipole approximation method to calculate absorption and scattering efficiencies and optical resonance wavelengths for three commonly used classes of nanoparticles: gold nanospheres, silica−gold nanoshells, and gold nanorods. The calculated spectra clearly reflect the well-known dependence of nanoparticle optical properties viz. the resonance wavelength, the extinction cross-section, and the ratio of scattering to absorption, on the nanoparticle dimensions. A systematic quantitative study of the various trends is presented. By increasing the size of gold nanospheres from 20 to 80 nm, the magnitude of extinction as well as the relative contribution of scattering to the extinction rapidly increases. Gold nanospheres in the size range commonly employed (∼40 nm)...
4,065 citations
TL;DR: In the present Communication, a completely "green" synthetic method for producing silver nanoparticles is introduced, by gentle heating of an aqueous starch solution containing silver nitrate and glucose, which produces relatively monodisperse, starchedsilver nanoparticles.
Abstract: In the present Communication, a completely "green" synthetic method for producing silver nanoparticles is introduced. The process is simple, environmentally benign, and quite efficient. By gentle heating of an aqueous starch solution containing silver nitrate and glucose, we produce relatively monodisperse, starched silver nanoparticles. beta-d-Glucose serves as the green reducing agent, while starch serves as the stabilization agent.
2,028 citations
TL;DR: High-temperature (300 degrees C) aging of iron-oleic acid metal complex, which was prepared by the thermal decomposition of iron pentacarbonyl in the presence of oleic acid at 100 degrees C, was found to generate monodisperse iron nanoparticles.
Abstract: The synthesis of highly crystalline and monodisperse γ-Fe2O3 nanocrystallites is reported. High-temperature (300 °C) aging of iron−oleic acid metal complex, which was prepared by the thermal decomposition of iron pentacarbonyl in the presence of oleic acid at 100 °C, was found to generate monodisperse iron nanoparticles. The resulting iron nanoparticles were transformed to monodisperse γ-Fe2O3 nanocrystallites by controlled oxidation by using trimethylamine oxide as a mild oxidant. Particle size can be varied from 4 to 16 nm by controlling the experimental parameters. Transmission electron microscopic images of the particles showed 2-dimensional and 3-dimensional assembly of particles, demonstrating the uniformity of these nanoparticles. Electron diffraction, X-ray diffraction, and high-resolution transmission electron microscopic (TEM) images of the nanoparticles showed the highly crystalline nature of the γ-Fe2O3 structures. Monodisperse γ-Fe2O3 nanocrystallites with a particle size of 13 nm also can be...
1,893 citations
TL;DR: The methods of making nanoparticles using plant extracts are reviewed, methods of particle characterization are reviewed and potential applications of the particles in medicine are discussed.
1,706 citations