Abstract

The application of high-voltage discharge plasma for water pollutant decomposition and the synthesis of nanoparticles under a high-pressure argon gas environment (~4 MPa) was demonstrated. The experiments were carried out in a batch-type system at room temperature with a pulsed DC power supply (15.4 to 18.6 kV) as a discharge plasma source. The results showed that the electrode materials, the pulsed repetition rates, the applied number of pulses, and the applied voltages had a significant effect on the degradation reactions of organic compounds. Furthermore, carbon solid materials from glycine decomposition were generated during the high-voltage discharge plasma treatment under high-pressure conditions, while Raman spectra and the HRTEM images indicated that titanium dioxide with a brookite structure and titanium carbide nanoparticles were also formed under these conditions. It was concluded that this process is applicable in practice and may lead to advanced organic compound decomposition and metal-based nanoparticle synthesis technologies.

Highlights

  • IntroductionPlasma is frequently assigned as the fourth state of matter, with the others being gas, liquid, and solid

  • The experiments were conducted at room temperature in the and the synthesis of nanoparticles

  • The experiments were conducted at room temperature batch-type system with a pulsed DC power supply as a discharge plasma source ranging from 15.4 to 18.6 kV

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Summary

Introduction

Plasma is frequently assigned as the fourth state of matter, with the others being gas, liquid, and solid. It consists of negative ions or electrons, positive ions, and neutral particles; in the universe, plasma is the most plentiful form of ordinary matter. Plasma can be formed by supplying energy to a neutral gas, leading to charge carrier formation, where various ways have been applied to neutral gas to provide the required energy for the generation of plasma, i.e., exothermic chemical reaction, gas adiabatic compression, and an energetic beam [1,2,3,4,5]

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