Raman Spectra of SrTiO3 Prepared by Direct Current Arc Discharge Plasma Process

2014 ◽  
Vol 1004-1005 ◽  
pp. 415-419
Author(s):  
Shuang Bin Li ◽  
Ying Yao ◽  
Yong Zhong Jia ◽  
Jing Yan ◽  
Shao Lei Xie
Keyword(s):  
Raman Spectra ◽  
Strontium Titanate ◽  
Direct Current ◽  
Discharge Plasma ◽  
Arc Discharge ◽  
Second Order ◽  
Plasma Process ◽  
Plasma Technique ◽  
Cubic Structure ◽  
Xrd Patterns

The XRD patterns of Strontium Titanate (SrTiO3) prepared by direct current arc discharge plasma technique show that the well crystallized cubic structure. A Raman spectra study is performed to investigate SrTiO3 ceramics and powders compared with earlier investigations. The observed Raman spectra in this work have been interpreted primarily as second order and derived from combinations, overtones and differences of phonon frequencies.

scholarly journals Carbon Nanostructures Production by AC Arc Discharge Plasma Process at Atmospheric Pressure

2011 ◽  
Vol 2011 ◽  
pp. 1-6 ◽  
Author(s):  
Shenqiang Zhao ◽  
Ruoyu Hong ◽  
Zhi Luo ◽  
Haifeng Lu ◽  
Biao Yan
Keyword(s):  
Electron Microscopy ◽  
Carbon Nanotubes ◽  
Atmospheric Pressure ◽  
Carbon Nanostructures ◽  
Discharge Plasma ◽  
Arc Discharge ◽  
Plasma Process ◽  
Wide Range ◽  
Ac Arc ◽  
Ac Arc Discharge

Carbon nanostructures have received much attention for a wide range of applications. In this paper, we produced carbon nanostructures by decomposition of benzene using AC arc discharge plasma process at atmospheric pressure. Discharge was carried out at a voltage of 380 V, with a current of 6 A–20 A. The products were characterized by scanning electron microscopy (SEM), high-resolution transmission electron microscopy (HRTEM), powder X-ray diffraction (XRD), and Raman spectra. The results show that the products on the inner wall of the reactor and the sand core are nanoparticles with 20–60 nm diameter, and the products on the electrode ends are nanoparticles, agglomerate carbon particles, and multiwalled carbon nanotubes (MWCNTs). The maximum yield content of carbon nanotubes occurs when the arc discharge current is 8 A. Finally, the reaction mechanism was discussed.

THE PREPARATION OF ULTRAFINE TUNGSTEN CARBIDE NANOPARTICLES BY DC ARC DISCHARGE PLASMA PROCESS

2013 ◽  
Vol 27 (19) ◽  
pp. 1341003 ◽  
Author(s):  
S. Q. ZHAO ◽  
S. W. JIN ◽  
Y. X. WANG
Keyword(s):  
Carbon Black ◽  
Tungsten Carbide ◽  
Discharge Current ◽  
Atmospheric Pressure ◽  
Discharge Plasma ◽  
Arc Discharge ◽  
Positive Electrode ◽  
Plasma Process ◽  
Dc Arc ◽  
Carbide Particles

Tungsten carbide nanoparticles were synthesized successfully by DC arc discharge plasma process with 23 A discharge current at atmospheric pressure, in which tungsten positive electrode reacted with carbon black produced from the benzene cracking. The XRD results indicate that the samples consist of carbon black, WC and W 2 C . The TEM micrographs show that the tungsten carbide particles range from 3 to 7 nm in size, and are composed of WC and W 2 C .

Enhanced hydrogen production by methanol decomposition using a novel rotating gliding arc discharge plasma

RSC Advances ◽  
2016 ◽  
Vol 6 (16) ◽  
pp. 12770-12781 ◽  
Author(s):  
Hao Zhang ◽  
Fengsen Zhu ◽  
Xiaodong Li ◽  
Kefa Cen ◽  
Changming Du ◽  
...  
Keyword(s):  
Hydrogen Production ◽  
Direct Current ◽  
Discharge Plasma ◽  
Arc Discharge ◽  
Plasma Reactor ◽  
Methanol Decomposition ◽  
Gliding Arc Discharge ◽  
Gliding Arc

Hydrogen production from methanol decomposition was performed in a novel direct current (DC) rotating gliding arc (RGA) plasma reactor.

A novel approach of waste tires rubber utilization via ambient air direct current arc discharge plasma

2022 ◽  
Vol 227 ◽  
pp. 107111
Author(s):  
A.Ya. Pak ◽  
K.B. Larionov ◽  
E.N. Kolobova ◽  
K.V. Slyusarskiy ◽  
J. Bolatova ◽  
...  
Keyword(s):  
Direct Current ◽  
Discharge Plasma ◽  
Arc Discharge ◽  
Ambient Air ◽  
Waste Tires ◽  
Novel Approach

scholarly journals One-Step Synthesis of SnO2/Carbon Nanotube Nanonests Composites by Direct Current Arc-Discharge Plasma and Its Application in Lithium-Ion Batteries

Nanomaterials ◽  
2021 ◽  
Vol 11 (11) ◽  
pp. 3138
Author(s):  
Da Zhang ◽  
Yuanzheng Tang ◽  
Chuanqi Zhang ◽  
Qianpeng Dong ◽  
Wenming Song ◽  
...  
Keyword(s):  
Carbon Nanotube ◽  
Lithium Ion Batteries ◽  
Direct Current ◽  
Discharge Plasma ◽  
Arc Discharge ◽  
Synthesis Method ◽  
Lithium Ion ◽  
Synthesis Process ◽  
Plasma Synthesis ◽  
One Step

Tin dioxide (SnO2)-based materials, as anode materials for lithium-ion batteries (LIBs), have been attracting growing research attention due to the high theoretical specific capacity. However, the complex synthesis process of chemical methods and the pollution of chemical reagents limit its commercialization. The new material synthesis method is of great significance for expanding the application of SnO2-based materials. In this study, the SnO2/carbon nanotube nanonests (SnO2/CNT NNs) composites are synthesized in one step by direct current (DC) arc-discharge plasma; compared with conventional methods, the plasma synthesis achieves a uniform load of SnO2 nanoparticles on the surfaces of CNTs while constructing the CNTs conductive network. The SnO2/CNT NNs composites are applied in LIBs, it can be found that the nanonest-like CNT conductive structure provides adequate room for the volume expansion and also helps to transfer the electrons. Electrochemical measurements suggests that the SnO2/CNT NNscomposites achieve high capacity, and still have high electrochemical stability and coulombic efficiency under high current density, which proves the reliability of the synthesis method. This method is expected to be industrialized and also provides new ideas for the preparation of other nanocomposites.

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