Aerosol synthesis of titanium nitride nanoparticles by direct current arc discharge method

2020 ◽  
Vol 31 (9) ◽  
pp. 4119-4128
Author(s):  
Qingqing Fu ◽  
David Kokalj ◽  
Dominic Stangier ◽  
Frank Einar Kruis ◽  
Wolfgang Tillmann
Keyword(s):  
Titanium Nitride ◽  
Direct Current ◽  
Arc Discharge ◽  
Aerosol Synthesis ◽  
Discharge Method

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

Nanomaterials ◽  
2018 ◽  
Vol 8 (9) ◽  
pp. 684 ◽  
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.

Efficient Co@CoPx core–shell nanochains catalyst for the oxygen evolution reaction

2018 ◽  
Vol 5 (8) ◽  
pp. 1844-1848 ◽  
Author(s):  
Xiaotao Yuan ◽  
Zhe Zhang ◽  
Zichao Liu ◽  
Xin Wang ◽  
Chenlong Dong ◽  
...  
Keyword(s):  
Oxygen Evolution ◽  
Direct Current ◽  
Oxygen Evolution Reaction ◽  
Arc Discharge ◽  
Core Shell ◽  
Discharge Method

Co@CoPx core–shell nanochains were prepared via a direct-current arc-discharge method and subsequent phosphorization at 350 °C.

Formation of carbon nanostructures with Ge and SiC nanoparticles prepared by direct current and radio frequency hybrid arc discharge

2000 ◽  
Vol 15 (10) ◽  
pp. 2182-2186 ◽  
Author(s):  
Takeo Oku ◽  
T. Hirata ◽  
N. Motegi ◽  
R. Hatakeyama ◽  
N. Sato ◽  
...  
Keyword(s):  
Radio Frequency ◽  
Direct Current ◽  
Carbon Nanostructures ◽  
Arc Discharge ◽  
Growth Direction ◽  
Structure Model ◽  
Sic Nanoparticles ◽  
High Resolution Images ◽  
Carbon Nanocage ◽  
Discharge Method

Carbon nanocage structures with Ge and SiC nanoparticles were synthesized by direct current and radio frequency (dc-rf) hybrid arc discharge of C, Ge, and Si elements. High-resolution images showed the formation of Ge and SiC nanoparticles and nanowires encapsulated in carbon nanocapsules and nanotubes. The growth direction of the Ge nanowires was found to be 〈111〉 of Ge, and a structure model for Ge/C interface was proposed. The present work indicates that the various carbon nanostructures with semiconductor nanoparticles and nanowires can be synthesized by the dc-rf hybrid arc-discharge method.

Production of Silver Nanoparticles Using High Voltage Arc Discharge Method

2016 ◽  
Vol 12 (6) ◽  
pp. 747-753 ◽  
Author(s):  
Marek J. Kasprowicz ◽  
Anna Gorczyca ◽  
Piotr Janas
Keyword(s):  
Silver Nanoparticles ◽  
High Voltage ◽  
Arc Discharge ◽  
Discharge Method

Synthesis of single-walled carbon nanotubes by an arc-discharge method using selenium as a promoter

Carbon ◽  
2011 ◽  
Vol 49 (14) ◽  
pp. 4792-4800 ◽  
Author(s):  
Liping Huang ◽  
Bin Wu ◽  
Jianyi Chen ◽  
Yunzhou Xue ◽  
Yunqi Liu ◽  
...  
Keyword(s):  
Carbon Nanotubes ◽  
Arc Discharge ◽  
Single Walled Carbon Nanotubes ◽  
Single Walled Carbon ◽  
Walled Carbon Nanotubes ◽  
Discharge Method

Effects of Two-Step DC Electrochemical Pretreatment of Fine Grinding WC-Co Tool Surface on Morphology and Quality of Diamond Coatings

2011 ◽  
Vol 337 ◽  
pp. 59-62
Author(s):  
Xiang Hui Zhang ◽  
Ling Wang ◽  
Jian Ping Long
Keyword(s):  
Surface Morphology ◽  
Direct Current ◽  
Arc Discharge ◽  
Etching Time ◽  
Diamond Coating ◽  
Diamond Coatings ◽  
Fine Grinding ◽  
Electrolytic Etching ◽  
Electrochemical Pretreatment

In the present investigation, diamond coating was deposited on fine grinding cemented carbide substrate by direct current arc discharge chemical vapor deposition. The effect of electrolytic etching time in the two-step electrochemical pretreatment process (firstly using electrolytic etching, and then using acid etching) on morphology and quality of the diamond coating were systemically studied. The surface morphology feature and quality of diamond coatings were characterized by means of Scanning Electron Microscope (SEM), laser Raman spectrometer respectively. The results showed that the electrolytic etching duration has distinctly effect on the quality and crystal features such as morphology, crystal type and grain size of diamond coating. It showed that as electrolytic current is direct current 3A, electrolytic etching time altering from 0.5 min to 7.5min, the surface morphology of diamond films gradually transition from microcrystalline cubic-octahedron to cauliflower type nanocluster, and further increase the electrolytic etching time, will lead to several negative effects on the quality and nucleation of the coatings which is not only retard the diamond nucleation, but also promote the formation of graphite.

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