Preparation of carbon-coated magnetic iron nanoparticles from composite rods made from coal and iron powders

Qiu, Jieshan; Li, Yongfeng; Wang, Yunpeng; An, Yuliang; Zhao, Zongbin; Zhou, Ying; Li, Wen

doi:10.1016/j.fuproc.2004.03.006

Cited by 36 publications

(13 citation statements)

References 22 publications

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“…Moreover, the carbon surface seems to be very effective for physical adsorption of drugs [5,6]. In addition, the carbon layers isolate the particles from each other, thus avoiding the problems caused by interactions between magnetic particles, as well as preventing bare metal nanoparticles from oxidation or degradation [7,8].…”

Section: Introductionmentioning

confidence: 99%

Carbon coated magnetic nanoparticles for local drug delivery using magnetic implants

Fernández-Pacheco¹,

Ibarra²,

Valdivia³

et al. 2005

Nanobiotechnol

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Bioferrofluids obtained from carbon coated iron nanoparticles are promising candidates for magnetic drug delivery. The carbon cages render the particles biocompatible, and provide a good support for drug adsorption. We propose a method in which gold plated permanent magnets are implanted directly in the affected organ, close to the tumour, by endoscopic techniques. The bioferrofluid charged with the chemotherapeutic agent is injected and the particles attracted to the magnet, then desorption of the drug takes place at the tumoral region. This method seems to be more promising, costless and effective than that based on the application of external magnetic fields. Preliminary results of drug adsorption and a preclinical experimental animal model are described.

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Section: Introductionmentioning

confidence: 99%

Carbon coated magnetic nanoparticles for local drug delivery using magnetic implants

Fernández-Pacheco¹,

Ibarra²,

Valdivia³

et al. 2005

Nanobiotechnol

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“…The preparation of magnetic nanoparticles encapsulated by carbon has been actively studied [1][2][3][4]. The outside carbon coating can protect the metal nanoparticles against degradation and oxidization and provides new applications for the materials as magnetic adsorbents or catalyst supports.…”

Section: Introductionmentioning

confidence: 99%

“…Carbon coated magnetic nanoparticles can be produced by different methods such as arch discharge (e.g. Fe [1], SiO 2 /Fe [5], Al 2 O 3 /Fe [6]), plasma discharge (e.g. Fe 3 C [7]), pyrolysis of metallic complexes (e.g.…”

Section: Introductionmentioning

confidence: 99%

Mössbauer study of carbon coated iron magnetic nanoparticles produced by simultaneous reduction/pyrolysis

et al. 2011

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Magnetic iron nanoparticles immersed in a carbon matrix were produced by a combined process of controlled dispersion of Fe 3+ ions in sucrose, thermal decomposition with simultaneous reduction of iron cores and the formation of the porous carbonaceous matrix. The materials were prepared with iron contents of 1, 4 and 8 in %wt in sucrose and heated at 400, 600 and 800 • . The samples were analyzed by XRD, Mössbauer spectroscopy, magnetization measurements, TG, SEM and TEM. The materials prepared at 400 • are composed essentially of Fe 3 O 4 particles and carbon, while treatments at higher temperatures, e.g. 600 and 800 • produced as main phases Fe 0 and Fe 3 C. The Mössbauer spectra of samples heated at 400 • showed two sextets characteristic of a magnetite phase and other contributions compatible with Fe 3+ and Fe 2+ phases in a carbonaceous matrix. Samples treated at temperatures above 600 • showed the presence of metallic iron with concentrations between 16-43%. The samples heated at 800 • produced higher amounts of Fe 3 C (between 20% and 58%). SEM showed for the iron 8% sample treated at 600-800 • C particle sizes smaller than 50 nm. Due to the presence of Fe 0 particles in the carbonaceous porous matrix the materials have great potential for application as magnetic adsorbents.

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“…Nano-powders possess many excellent properties that can meet some specific requirements, thereby attracting many researchers' attention. Normally, the shape of nano-powders is spherical, but several kinds of nano-powders with special shapes were developed for specific applications, such as nanotubes, nanowires, nanorods, nanoribbons, nanobelts, and nanosheets (Chen et al, 2004;Lee et al, 2003;Lee and Kim 2004;Li et al, 2003;Kearns, 2004;Tsai, 2004;Qiu et al, 2004). Nanosheet powders (NSPs) can be prepared by the following procedure: 1) Thin films were formed on suitable substrates by deposition; 2) The thin films were peeled off from substrates and NSPs were obtained.…”

Section: Introductionmentioning

confidence: 99%

Preparation and characterization of carbon nano-sheet powders

et al. 2008

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Carbon nanosheet fi lms were deposited on Al substrates by using plasma assisted chemical vapor deposition (PACVD) technique. And after being peeled off from Al substrates, carbon nanosheet powders (CNSPs) were obtained. In Raman spectrum of carbon fi lm, there was a strong and broadened peak at about 1,580 cm -1 , indicating a carbon diamond-like fi lm. Atomic force microscope image showed that the carbon diamond-like fi lm had a grain size less than 100 nm, and its surface roughness Ra was 17.95 nm in an area of 5×5 m 2 . The CNSPs were irregular sheets with curly edges and a length of several micrometers to several hundreds of micrometers. The BET surface area of CNSPs was 6.66 m 2 /g with no micro-pore present, which was confi rmed by N 2 adsorption-desorption characterization. In the adsorption testing, when the relative pressure p/p 0 was higher than 0.3, the adsorption behavior did not follow the Langmuir equation. The addition of CNSPs to carbon black (catalyst support) could improve hydrodesulfurization performance of carbon supported Ni-W catalysts for diesel oil.

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Preparation of carbon-coated magnetic iron nanoparticles from composite rods made from coal and iron powders

Cited by 36 publications

References 22 publications

Carbon coated magnetic nanoparticles for local drug delivery using magnetic implants

Carbon coated magnetic nanoparticles for local drug delivery using magnetic implants

Mössbauer study of carbon coated iron magnetic nanoparticles produced by simultaneous reduction/pyrolysis

Preparation and characterization of carbon nano-sheet powders

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