Synthesis of magnetic and superhydrophobic nickel nanoparticles by plasma arc discharge method, application for efficient recoverable and repeatable oil separation from oily-water

We report for the first time the synthesis of nanopowders of TbN, DyN and HoN crystallized in a cubic structure by the plasma arc discharge (PAD) method and investigate their magnetocaloric properties for magnetic refrigeration applications.

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Facile synthesis of Cu and CuO nanoparticles from copper scrap using plasma arc discharge method and evaluation of antibacterial activity

Materials Technology ◽

10.1080/10667857.2020.1734721 ◽

2020 ◽

Vol 36 (2) ◽

pp. 97-104 ◽

Cited By ~ 1

Author(s):

S. B. Tharchanaa ◽

K. Priyanka ◽

K. Preethi ◽

G. Shanmugavelayutham

Keyword(s):

Antibacterial Activity ◽

Arc Discharge ◽

Cuo Nanoparticles ◽

Plasma Arc ◽

Facile Synthesis ◽

Plasma Arc Discharge ◽

Discharge Method

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Preparation and Characteristics of MnAlC Nanoparticles by Plasma Arc-Discharge

Materials Science Forum ◽

10.4028/www.scientific.net/msf.675-677.307 ◽

2011 ◽

Vol 675-677 ◽

pp. 307-310

Author(s):

Pu Li ◽

Jung Goo Lee ◽

Xing Long Dong ◽

Chul Jin Choi

Keyword(s):

Smooth Surface ◽

Arc Discharge ◽

Spherical Shape ◽

Oxide Shell ◽

Core Shell ◽

Plasma Arc ◽

Plasma Arc Discharge ◽

Core Shell Structure ◽

Discharge Method ◽

Mn Oxides

MnAlC nanoparticles were synthesized by plasma arc-discharge method. Heat treatment of these nanoparticles at temperature from 400 to 600 °C resulted in the formation of the ferromagnetic τ-phase. Most of the nanoparticles had nearly spherical shape, smooth surface and core/shell structure. The shells of the nanoparticles mainly consisted of Al2O3 and a small amount of Mn oxides. Though the saturation magnetization of MnAlC nanoparticles was lower than that of bulk samples due to the effect of nonmagnetic phases (β, γ2 and Mn3AlC) and the oxide shell, the highest coercivity, up to 5.6 kOe in the MnAlC magnets, was achieved when annealed at 500 °C for 30 min.

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Preparation of Nickel Nanoparticles by Direct Current Arc Discharge Method and Their Catalytic Application in Hybrid Na-Air Battery

Nanomaterials ◽

10.3390/nano8090684 ◽

2018 ◽

Vol 8 (9) ◽

pp. 684 ◽

Cited By ~ 9

Author(s):

Fengmei Su ◽

Xuechao Qiu ◽

Feng Liang ◽

Manabu Tanaka ◽

Tao Qu ◽

...

Keyword(s):

Direct Current ◽

Composite Structures ◽

High Speed ◽

Large Scale ◽

Nickel Nanoparticles ◽

Arc Discharge ◽

Band Pass Filter ◽

Pass Filter ◽

Air Battery ◽

Discharge Method

Nickel nanoparticles were prepared by the arc discharge method. Argon and argon/hydrogen mixtures were used as plasma gas; the evaporation of anode material chiefly resulted in the formation of different arc-anode attachments at different hydrogen concentrations. The concentration of hydrogen was fixed at 0, 30, and 50 vol% in argon arc, corresponding to diffuse, multiple, and constricted arc-anode attachments, respectively, which were observed by using a high-speed camera. The images of the cathode and anode jets were observed with a suitable band-pass filter. The relationship between the area change of the cathode/anode jet and the synchronous voltage/current waveform was studied. By investigating diverse arc-anode attachments, the effect of hydrogen concentration on the features of nickel nanoparticles were investigated, finding that 50 vol% H2 concentration has high productivity, fine crystallinity, and appropriate size distribution. The synthesized nickel nanoparticles were then used as catalysts in a hybrid sodium–air battery. Compared with commercial a silver nanoparticle catalyst and carbon black, nickel nanoparticles have better electrocatalytic performance. The promising electrocatalytic activity of nickel nanoparticles can be ascribed to their good crystallinity, effective activation sites, and Ni/NiO composite structures. Nickel nanoparticles prepared by the direct current (DC) arc discharge method have the potential to be applied as catalysts on a large scale.

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