Synthesis and characterization of Fe3O4 nanoparticles coated with fucan polysaccharides

Magnetite nanoparticles (Fe3O4) and humic acid coated magnetite nanoparticles (Fe3O4/HA) were prepared by co-precipitation method for cerium ions removal from aqueous solution. The success of preparation in nanoscale was confirmed by XRD and TEM. The TEM image shows that the size of Fe3O4 is around 15 nm and the presence of humic acid reduces the magnetite aggregation and stabilizes the magnetite suspension. Adsorption studies with respect to various process variables Downloaded by [New York University] at 23:16 17 June 2016 2 such as contact time, pH and temperature were investigated by batch technique. The sorption kinetics and isotherms of Fe3O4 and Fe3O4/HA for Ce (IV) ions show that the sorption kinetics follow the pseudo-second-order and Langmuir isotherm model for both sorbents. The maximum capacity (Qmax) of Ce (IV) onto Fe3O4 and Fe3O4/HA were found to be 160, 280 mg/g, respectively. The thermodynamic parameters (∆G o , ∆H o and ∆S o ) were calculated, and the results revealed that the sorption process of Ce (IV) ions on both Fe3O4 and Fe3O4 /HA are spontaneous, endothermic for Fe3O4 and exothermic for Fe3O4/HA.

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“…Similar 7 results were obtained by (Hong et al 2008;Silva et al 2013). The crystal size of Fe3O4, is evaluated by using the Scherrer's equation:…”

Section: X-ray Diffractionsupporting

confidence: 56%

Kinetic sorption study of Cerium (IV) on magnetite nanoparticles

Ahmed

Gamal

Abo-El-Enein

et al. 2016

Particulate Science and Technology

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“…In recent years, several types of saccharides such as sucrose, dextran, starch, fucan, glycogen, and cellulose have been investigated as coating agents for iron oxide nanoparticles [18][19][20][21][22]. Due to its excellent biocompatibility, dextran has often been the best choice for coating.…”

Section: Introductionmentioning

confidence: 99%

Synthesis, Characterization, and Toxicity Evaluation of Dextran-Coated Iron Oxide Nanoparticles

Balaș

Ciobanu

Burtéa

et al. 2017

Metals

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Abstract:We report the synthesis of dextran-coated iron oxide magnetic nanoparticles (DIO-NPs) with spherical shape and uniform size distribution as well as their accumulation and toxic effects on Jurkat cells up to 72 h. The characterization of dextran-coated maghemite nanoparticles was done by X-ray diffraction and dynamic light scattering analyses, transmission electron microscopy imaging, attenuated total reflectance Fourier transform infrared (ATR-FTIR) spectroscopy, magnetic hysteresis, and relaxometry measurements. The quantification of DIO-NPs intracellular uptake showed a progressive accumulation of iron as a function of time and dose accompanied by additional lysosome formation and an increasing darkening exhibited by a magnetic resonance imaging (MRI) scanner. The cytotoxicity assays revealed a decrease of cell viability and a loss of membrane integrity in a time-and dose-dependent manner. Exposure to DIO-NPs determined an increase in reactive oxygen species level up to 72 h. In the first two days of exposure, the level of reduced glutathione decreased and the amount of malondyaldehyde increased, but at the end of the experiment, their concentrations returned to control values. These nanoparticles could be used as contrast agents for MRI but several parameters concerning their interaction with the cells should be taken into consideration for a safe utilization.

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“…For the all NPs, the spinel structure of Fe 3 O 4 was observed. The peak positions were observed at 30.0, 35.5, 43.0, 53.6, 57.1, and 62.7°, which were indexed as (220), (311), (400), (422), (511), and (440), respectively (JCPDS Card: 19–29) . These results indicated that the Fe 3 O 4 NPs were successfully incorporated in the synthetic procedure and the crystal structure of Fe 3 O 4 was maintained after coating of MIP layer.…”

Section: Resultsmentioning

confidence: 85%

Efficient and selective separation of metronidazole from human serum by using molecularly imprinted magnetic nanoparticles

Bilici

Zengi̇n

Ekmen

et al. 2018

J of Separation Science

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Magnetic molecularly imprinted nanoparticles were prepared through surface-initiated reversible addition fragmentation chain transfer polymerization by using metronidazole as a template. The molecularly imprinted magnetic nanoparticles were characterized by attenuated total reflection Fourier transform infrared spectroscopy, X-ray photoelectron spectroscopy, transmission electron microscopy, X-ray diffraction and vibrating sample magnetometry. The adsorption characteristics were also investigated and the kinetics of the adsorption of metronidazole on the imprinted nanoparticles were described by the second-order kinetic model with the short equilibrium adsorption time (30 min). The adsorption isotherm was well matched with the Langmuir isotherm in which the maximum adsorption capacity was calculated to be 40.1 mg/g. Furthermore, the imprinted magnetic nanoparticles showed good selectivity as well as reusability even after six adsorption-desorption cycles. The imprinted magnetic nanoparticles were used as a sorbent for the selective separation of metronidazole from human serum. The recoveries of metronidazole from human serum changed between 97.5-99.8% and showed similar sensitivity as compared with an enzyme-linked immunoassay method. Therefore, the molecularly imprinted magnetic nanoparticles might have potential application for the selective and reliable separation of metronidazole from biological fluids in clinical applications. This article is protected by copyright. All rights reserved.

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Synthesis and characterization of Fe3O4 nanoparticles coated with fucan polysaccharides

Cited by 310 publications

References 42 publications

Kinetic sorption study of Cerium (IV) on magnetite nanoparticles

Kinetic sorption study of Cerium (IV) on magnetite nanoparticles

Synthesis, Characterization, and Toxicity Evaluation of Dextran-Coated Iron Oxide Nanoparticles

Efficient and selective separation of metronidazole from human serum by using molecularly imprinted magnetic nanoparticles

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