Investigation of the combustion of iron pentacarbonyl and the formation of key intermediates in iron oxide synthesis flames

The laser pyrolysis is a powerful and a versatile tool for the gas-phase synthesis of nanoparticles. In this paper, some fundamental and applicative characteristics of this technique are outlined and recent results obtained in the preparation of gamma iron oxide (γ-Fe2O3) and titania (TiO2) semiconductor nanostructures are illustrated. Nanosized iron oxide particles (4 to 9 nm diameter values) have been directly synthesized by the laser-induced pyrolysis of a mixture containing iron pentacarbonyl/air (as oxidizer)/ethylene (as sensitizer). Temperature-dependent Mossbauer spectroscopy shows that mainly maghemite is present in the sample obtained at higher laser power. The use of selectedFe2O3samples for the preparation of water-dispersed magnetic nanofluids is also discussed.TiO2nanoparticles comprising a mixture of anatase and rutile phases were synthesized via the laser pyrolysis ofTiCl4- (vapors) based gas-phase mixtures. High precursor concentration of the oxidizer was found to favor the prevalent anatase phase (about 90%) in the titania nanopowders.

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Amorphous iron oxide prepared by microwave heating

Journal of Materials Research ◽

10.1557/jmr.2000.0313 ◽

2000 ◽

Vol 15 (10) ◽

pp. 2176-2181 ◽

Cited By ~ 31

Author(s):

Oleg Palchik ◽

Israel Felner ◽

Gina Kataby ◽

Aharon Gedanken

Keyword(s):

Phase Transition ◽

Differential Scanning Calorimetry ◽

Iron Oxide ◽

Iron Pentacarbonyl ◽

Microwave Oven ◽

The Other ◽

Scanning Calorimetry ◽

Amorphous Iron ◽

Domestic Microwave Oven ◽

Crystalline Phase Transition

Amorphous iron oxide (Fe2O3) was prepared by the pyrolysis of iron pentacarbonyl [Fe(CO)5] in a modified domestic microwave oven in refluxing chlorobenzene as a solvent under air. The reaction time was 20 min. Partially separated particles of iron oxide, 2–3 nm in diameter, were obtained. The other part showed aggregated spheres with a diameter of 25–40 nm. Differential scanning calorimetry measurements showed an amorphous/crystalline phase transition at about 250 °C.

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Iron Oxide Shell as the Oxidation-Resistant Layer in SmCo5@Fe2O3 Core–Shell Magnetic Nanoparticles

Journal of Nanoscience and Nanotechnology ◽

10.1166/jnn.2007.18035 ◽

2007 ◽

Vol 7 (1) ◽

pp. 356-361 ◽

Cited By ~ 18

Author(s):

Xiaowei Teng ◽

Hong Yang

Keyword(s):

Iron Oxide ◽

Magnetic Nanoparticles ◽

Iron Pentacarbonyl ◽

Trioctylphosphine Oxide ◽

Oxide Shell ◽

Ambient Conditions ◽

Exchange Biasing ◽

Antiferromagnetic Layer ◽

Co Nanoparticles ◽

Resistant Layer

This paper presents a synthesis of magnetic nanoparticles of samarium cobalt alloys and the use of iron oxide as a coating layer to prevent the rapid oxidation of as-made Sm–Co nanoparticles. The colloidal nanoparticles of Sm–Co alloys were made in octyl ether using samarium acetylacetonate and dicobalt octacarbonyl as precursors in a mixture of 1,2-hexadecanediol, oleic acid, and trioctylphosphine oxide (TOPO). Such Sm–Co nanoparticle could be readily oxidized by air and formed a CoO antiferromagnetic layer. Exchange biasing was observed for the surface oxidized nanoparticles. In situ thermal decomposition of iron pentacarbonyl was used to create iron oxide shells on the Sm–Co nanoparticles. The iron oxide shell could prevent Sm–Co nanoparticles from rapid oxidation upon the exposure to air at ambient conditions.

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Effect of Hydrophobic Iron Oxide Nanoparticles on the Properties of Oil-Based Drilling Fluid

Journal of Energy Resources Technology ◽

10.1115/1.4048231 ◽

2020 ◽

Vol 143 (4) ◽

Author(s):

Muhammad Awais Ashfaq Alvi ◽

Mesfin Belayneh ◽

Kjell Kåre Fjelde ◽

Arild Saasen ◽

Sulalit Bandyopadhyay

Keyword(s):

High Temperature ◽

Iron Oxide ◽

Base Fluid ◽

Drilling Fluid ◽

Iron Pentacarbonyl ◽

Inert Atmosphere ◽

Drilling Fluids ◽

Oil Well ◽

The Coefficient Of Friction ◽

Filtrate Loss

Abstract Lately, nanoparticles (NPs) have shown the potential to improve the performance of oil well fluids significantly. Several studies have reported the ability of NPs to produce improved properties of both water and oil-based drilling fluids. In this study, hydrophobic iron oxide NPs were synthesized by thermal decomposition of iron pentacarbonyl in an inert atmosphere, and its performance was tested in the oil-based drilling fluid with 90/10 oil-to-water ratio (base fluid). Oil-based drilling fluids treated with nanofluids were formulated by adding 0.5 wt% and 1.0 wt% iron oxide NPs in hexane solution to the base drilling fluid. The base fluid and the nanofluid-treated drilling fluids were evaluated by characterizing their rheological properties at different temperatures, viscoelastic properties, lubricity, filtrate loss, static and dynamic settling, and separation properties. Results showed that 0.5 wt% iron oxide dispersed in hexane reduced the high pressure high temperature (HPHT) filtrate loss by 70%, filter cake thickness by 55%, and the coefficient of friction by 39%. Moreover, the nanofluid based drilling fluid reduced the free oil layer caused by syneresis during aging at high temperature by 16.3% compared to the base fluid. This study has shown that hydrophobic iron oxide NPs have the potential to improve the properties of oil-based drilling fluid.

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Micelle Encapsulation of Ferromagnetic Nanoparticles of Iron Carbide@Iron Oxide in Chitosan as Possible Nanomedicine Agent

Colloids and Interfaces ◽

10.3390/colloids4020022 ◽

2020 ◽

Vol 4 (2) ◽

pp. 22

Author(s):

Perla Yazmin Sauceda-Oloño ◽

Hector Cardenas-Sanchez ◽

Anya Isabel Argüelles-Pesqueira ◽

Cindy Gutierrez-Valenzuela ◽

Mario Enrique Alvarez-Ramos ◽

...

Keyword(s):

Oleic Acid ◽

Iron Oxide ◽

Iron Carbide ◽

Sodium Dodecylsulfate ◽

Chemical Properties ◽

Chitosan Solution ◽

Iron Pentacarbonyl ◽

Hydrodynamic Diameter ◽

Shell Nanoparticles ◽

Physical And Chemical

In this work, the synthesis and characterization of core/shell nanoparticles of iron carbide@iron oxide (Fe3C/γ-Fe2O3) encapsulated into micelles of sodium dodecylsulfate and oleic acid and stabilized with chitosan was developed. The materials were sonosynthesized at low intensities using standard ultrasonic baths with iron pentacarbonyl (Fe(CO)5) and oleic acid as iron source and hydrophobic stabilizer, respectively; obtaining nanoparticles with a hydrodynamic diameter of 19.71 nm and polydispersive index (PDI) of 0.13. The iron carbide@iron oxide nanoparticles (ICIONPs) in oleic acid were used as the organic phase during the self-assemble of nanoemulsion with sodium dodecylsulfate in water to obtain the metastable micelles. The final step involved the stabilization of the micelles using low molecular weight chitosan solution at 2% in acetic acid by ultrasonication bath. The nanosystem showed a hydrodynamic diameter of 185.30 nm, a PDI of 0.15 with a superficial charge ζ of 36.70 mV. Due to the magnetic, physical and chemical properties previously measured of the ICIONPs, it is believed that this type of nanoparticles can be used as a possible nanomedicine agent.

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Synthesis and Evaluation of Magnetic Nanoparticles for Biomedical Applications

Journal of Nanoparticles ◽

10.1155/2013/370812 ◽

2013 ◽

Vol 2013 ◽

pp. 1-9 ◽

Cited By ~ 9

Author(s):

Nydeia W. Bolden ◽

Vijaya K. Rangari ◽

Shaik Jeelani ◽

Seyhan Boyoglu ◽

Shree R. Singh

Keyword(s):

Mössbauer Spectroscopy ◽

Iron Oxide ◽

Magnetic Nanoparticles ◽

Ethylene Glycol ◽

Mossbauer Spectroscopy ◽

Iron Pentacarbonyl ◽

Poly Vinyl Alcohol ◽

Sonochemical Method ◽

Power Ultrasound ◽

Mößbauer Spectroscopy

In this study, iron oxide (IO) nanoparticles from various precursors have been synthesized using sonochemical method and characterized for their structural variability and toxicity. The iron oxide (IO) precursor solutions were prepared from iron acetate (IA), iron pentacarbonyl (IP), decalin, PEG (poly(ethylene glycol)), EG (ethylene glycol), PVA (poly(vinyl alcohol)), β-cyclodextrin (CD), and distilled water. These precursor solutions were irradiated with high power ultrasound for 3 hours and heat treated as needed. These as-prepared iron oxide nanoparticles were characterized using X-ray diffraction (XRD), Mössbauer spectroscopy, transmission electron microscopy (TEM), and magnetization measurements. XRD results show that all the particles are highly crystalline in nature and the particles sizes measured from TEM are approximately 5–20 nm. The maximum magnetization was observed for IO-IP at approximately 60.17 emu/g and the minimum was approximately 30.56 emu/g for IO-IA. These results confirm that the particles are superparamagnetic (SPM) in nature. Mössbauer spectroscopy verified the magnetic nanoparticles are purely Fe3O4 and particles sizes varied by the nature of the precursor and coatings.

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Iron–iron oxide composite thin films prepared by chemical vapor deposition from iron pentacarbonyl

Thin Solid Films ◽

10.1016/s0040-6090(98)00999-7 ◽

1998 ◽

Vol 333 (1-2) ◽

pp. 203-206 ◽

Cited By ~ 18

Author(s):

Toshiro Maruyama ◽

Yoshitaka Shinyashiki

Keyword(s):

Thin Films ◽

Chemical Vapor Deposition ◽

Iron Oxide ◽

Vapor Deposition ◽

Chemical Vapor ◽

Iron Pentacarbonyl ◽

Composite Thin Films ◽

Oxide Composite ◽

Iron Iron

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On the mechanism of nanoparticle formation in a flame doped by iron pentacarbonyl

Physical Chemistry Chemical Physics ◽

10.1039/c4cp04454a ◽

2015 ◽

Vol 17 (1) ◽

pp. 680-685 ◽

Cited By ~ 12

Author(s):

Marina Poliak ◽

Alexey Fomin ◽

Vladimir Tsionsky ◽

Sergey Cheskis ◽

Irenaeus Wlokas ◽

...

Keyword(s):

Iron Oxide ◽

Metallic Iron ◽

Iron Pentacarbonyl ◽

Synthesis Process ◽

Flame Synthesis ◽

Adequate Description ◽

Nanoparticle Formation ◽

Iron Nanoparticle ◽

First Time ◽

Nanoparticle Generation

Early nanoparticle formation in iron oxide flame synthesis was unambiguously observed for the first time, suggesting that models including metallic iron nanoparticle generation are required for adequate description of the synthesis process.

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