Synthesis of aluminium nanoparticles by arc plasma spray under atmospheric pressure

Mandilas, Charalampos; Daskalos, Emmanouil; Karagiannakis, George; Konstandopoulos, Athanasios G.

doi:10.1016/j.mseb.2012.10.004

Cited by 32 publications

(12 citation statements)

References 35 publications

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“…45 Of the total 3% of Fe detected, the curve fitting of the Fe 2p 3/2 peaks (Fe 2+ : 710.0 eV; Fe 3+ : 711.1 eV) shows that 2.4% is unambiguously attributed to Fe 3+ (Fe 3+ /Fe 2+ = 4). Such a high Fe 3+ /Fe 2+ ratio, coupled with a low contribution of metallic O, could emerge from the presence of goethite (α-FeOOH) or ferrihydrite (Fe 5 O 3 (OH) 9 ). 46 These iron oxyhydroxide species The dextran-coated IONCs were also studied by Fourier transform infrared spectroscopy (FTIR) and compared to pure dextran.…”

Section: ■ Results and Discussionmentioning

confidence: 99%

“…The advent of a new generation of plasma reactors operating at atmospheric pressure (AP) has led to the development of innovative concepts and processes in the fields of surface treatment, − water purification, − and nanomaterials synthesis, − to name only a few. In particular, the interactions between plasma and water solutions containing metal salts and surfactants can lead to efficient metal nanoparticles synthesis procedures, referred to as plasma electrochemistry. − Conventional nanoparticle synthesis procedures based on colloidal chemistry usually require multiple solvent transfers and cleaning steps as well as the use of potentially toxic chemical reducing agents (e.g., NaBH 4 ).…”

Section: Introductionmentioning

confidence: 99%

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Rapid Nucleation of Iron Oxide Nanoclusters in Aqueous Solution by Plasma Electrochemistry

et al. 2015

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Progresses in cold atmospheric plasma technologies have made possible the synthesis of nanoparticles in aqueous solutions using plasma electrochemistry principles. In this contribution, a reactor based on microhollow cathodes and operating at atmospheric pressure was developed to synthesize iron-based nanoclusters (nanoparticles). Argon plasma discharges are generated at the tip of the microhollow cathodes, which are placed near the surface of an aqueous solution containing iron salts (FeCl2 and FeCl3) and surfactants (biocompatible dextran). Upon reaction at the plasma-liquid interface, reduction processes occur and lead to the nucleation of ultrasmall iron-based nanoclusters (IONCs). The purified IONCs were investigated by XPS and FTIR, which confirmed that the nucleated clusters contain a highly hydrated form of iron oxide, close to the stoichiometric constituents of α-FeOOH (goethite) or Fe5O3(OH)9 (ferrihydrite). Relaxivity values of r1 = 0.40 mM(-1) s(-1) and r2/r1 = 1.35 were measured (at 1.41 T); these are intermediate values between the relaxometric properties of superparamagnetic iron oxide nanoparticles used in medicine (USPIO) and those of ferritin, an endogenous contrast agent. Plasma-synthesized IONCs were injected into the mouse model and provided positive vascular signal enhancement in T1-w. MRI for a period of 10-20 min. Indications of rapid and strong elimination through the urinary and gastrointestinal tracts were also found. This study is the first to report on the development of a compact reactor suitable for the synthesis of MRI iron-based contrast media solutions, on site and upon demand.

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Section: ■ Results and Discussionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Rapid Nucleation of Iron Oxide Nanoclusters in Aqueous Solution by Plasma Electrochemistry

et al. 2015

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“…Metallic Al particles have also been investigated for potential applications as fuels, energy storage materials, and pigments [4][5][6]. Many reported methods for synthesizing metallic Al particles involve the electrical evaporation or explosion of metallic Al wire in a gaseous medium, which is a well-known gasphase process for synthesizing particles [7][8][9][10][11][12]. Although this gas-phase process works well, it requires equipment that is expensive, consumes a large amount of electric power, and is complicated and dangerous to perform.…”

Section: Introductionmentioning

confidence: 99%

Synthesis of metallic aluminum particles by electrolysis in aqueous solution

Hosoya

Yonezawa

Yamauchi

et al. 2021

Micro and Nano Syst Lett

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The present work proposes a method for fabricating metallic Al particles in aqueous solution. An aqueous colloidal solution was prepared from an aqueous aluminum nitrate nonahydrate solution by electrolysis using metallic Al plates as the anode and cathode under ultrasonic irradiation in water at 25–45 °C. The sizes of the particles in the colloidal solutions prepared at 25, 35, and 45 °C were 76.3, 77.0, and 84.7 nm, respectively. The powder obtained from the colloidal solution prepared at 25 °C was not crystalline. By contrast, the powders obtained from the colloidal solutions prepared at 35 and 45 °C had a crystal structure of cubic Al and crystal sizes of 55.7 and 59.3 nm, respectively. Thus, elevated temperatures promoted both particle growth and crystal growth, which was explained by higher temperatures increasing the frequency and energy of particle collisions. The metallic Al particles were chemically stable in both an aqueous solution and the ambient atmosphere. The chemically stable metallic Al particles are expected to be used as sources for fabricating materials related to fuels, energy storage, and pigments.

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“…The applications of plasma technology now extend to a large number of industrial domains, including surface treatment of polymers, ozone production for sterilization, water and air treatment, as well as nanoparticles (NPs) synthesis . In the past few years, the development of devices and generators enabling sustained plasma discharges at atmospheric pressure conditions has broadened the spectra of potential applications.…”

Section: Introductionmentioning

confidence: 99%

Colloidal Suspensions of Platinum Group Metal Nanoparticles (Pt, Pd, Rh) Synthesized by Dielectric Barrier Discharge Plasma (DBD)

Sauvageau

Turgeon

Chevallier

et al. 2018

Part & Part Syst Charact

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Atmospheric-pressure plasmas produced by dielectric barrier discharge can be used to grow nanoparticles from aqueous solutions containing ions from the platinum group metals (PGM: Pt, Pd, and Rh). The technology could also be applied to recover PGM from waste solutions. In plasma electrochemistry, PGM solutions act as a liquid electrode, and a counter electrode located near the surface of the liquid is used to generate the plasma (e.g., hydrogen, argon). The treatment synthesizes nanoparticles within minutes, which can be separated from the treated solutions. In the present study, small concentrations of PGM ions (1 × 10 −3 m) are recuperated from aqueous solutions containing chloride ions. The efficiency of the process is quantified by elemental analysis, and the size of the colloids, measured by dynamic light scattering (DLS) and transmission electron microscopy (TEM). Very high recovery yields are found for palladium (>99%), as well as for rhodium (>75%) and for platinum (>51%). Plasma electrochemistry is a very efficient and rapid process to recuperate PGM ions from water solutions (faster than conventional electrowinning) such as industrial waste, acid leach, and related effluents. The very fine and surfactant-free nanoparticles could find promising applications as industrial and automotive catalysts. Nanoparticle Plasma Synthesis

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Synthesis of aluminium nanoparticles by arc plasma spray under atmospheric pressure

Cited by 32 publications

References 35 publications

Rapid Nucleation of Iron Oxide Nanoclusters in Aqueous Solution by Plasma Electrochemistry

Rapid Nucleation of Iron Oxide Nanoclusters in Aqueous Solution by Plasma Electrochemistry

Synthesis of metallic aluminum particles by electrolysis in aqueous solution

Colloidal Suspensions of Platinum Group Metal Nanoparticles (Pt, Pd, Rh) Synthesized by Dielectric Barrier Discharge Plasma (DBD)

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