Plasma dynamic synthesis of disperse iron oxides in a multipulse operation mode of coaxial magnetoplasma accelerator

These days, environmental pollution problems are relevant, therefore, the problems associated with photocatalysis as a direction for the future development of alternative energy are solved by many world scientists. Titanium dioxide TiO2 is known to be a photocatalytic material with many unique properties. However, its use is limited due to its wide band gap and the high recombination rate of electron pairs. The method of direct plasma dynamic synthesis of dispersed titanium dioxide was proposed. It was established that the synthesized product consisted of two fractions which had different sizes: a coarse fraction with particle sizes from ~10 microns to ~100 microns and a fine one - from ~10 nm to ~1 micron. It was also revealed that fractions mainly consisted of two TiO2 crystalline modifications: anatase and rutile with tetragonal syngony.

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Studying the influence of supply pulse duration on the phase composition of iron oxides obtained by the plasma-dynamic method

IOP Conference Series Materials Science and Engineering ◽

10.1088/1757-899x/1019/1/012096 ◽

2021 ◽

Vol 1019 ◽

pp. 012096

Author(s):

I I Shanenkov ◽

A A Sivkov ◽

A S Ivashutenko ◽

M I Gukov ◽

Y L Shanenkova

Keyword(s):

Phase Composition ◽

Iron Oxides ◽

Pulse Duration ◽

Dynamic Method ◽

Plasma Dynamic

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Plasma dynamic synthesis and obtaining ultradispersed zinc oxide with single-crystalline particle structure

Advanced Powder Technology ◽

10.1016/j.apt.2016.05.012 ◽

2016 ◽

Vol 27 (4) ◽

pp. 1506-1513 ◽

Cited By ~ 17

Author(s):

Alexander Sivkov ◽

Alexander Ivashutenko ◽

Yuliya Shanenkova ◽

Ivan Shanenkov

Keyword(s):

Zinc Oxide ◽

Crystalline Particle ◽

Particle Structure ◽

Plasma Dynamic ◽

Single Crystalline ◽

Dynamic Synthesis

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Influence of Oxygen Concentration on Plasma Dynamic Synthesis Product in Fe-O System

Solid State Phenomena ◽

10.4028/www.scientific.net/ssp.265.652 ◽

2017 ◽

Vol 265 ◽

pp. 652-656 ◽

Cited By ~ 2

Author(s):

Ivan Shanenkov ◽

A. Sivkov ◽

A. Ivashutenko

Keyword(s):

Oxygen Concentration ◽

Practical Interest ◽

Electrode System ◽

Iron Electrode ◽

Electromagnetic Properties ◽

Synthesis Product ◽

Plasma Dynamic ◽

Dynamic Synthesis ◽

Lower Oxygen ◽

Unique Method

In spite of being known for centuries, iron oxides are still important. Such modifications as magnetite Fe3O4 and epsilon phase ε-Fe2O3 are of great scientific and practical interest due to their promising electromagnetic properties. Nonetheless, only few methods allow synthesizing both of these phases, but they have some well-known disadvantages, which limit the possibility of using them widely. This work shows a unique method of synthesizing these materials in one short-duration plasma dynamic process using a coaxial magnetoplasma accelerator with iron electrode system. The plasma chemical reaction occurs between the iron-containing plasma and gaseous precursor (oxygen). The influence of oxygen pressure on the products of plasma dynamic synthesis was also studied in the framework of this investigation. It was found that the higher oxygen concentration leads to the formation of product with predominant content of epsilon iron oxide ε-Fe2O3, as well as lower oxygen concentration results in obtaining the product with the dominance of magnetite phase.

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