Issue 15, 2025

Characteristics of chemical products under the NOx mode of dielectric barrier discharge: comprehensive effects of specific energy input and magnetic field

Abstract

The reactive nitrogen species generated under the NOx mode of dielectric barrier discharge have attracted widespread attention in biomedical applications, with the crucial factor for their utilization being the regulation of the species proportion. In this work, we investigated the variation of NOx mode products in an AC-driven coaxial dielectric barrier discharge system under different specific energy inputs (SEIs) controlled by voltages and gas flow rates in the presence and absence of a magnetic field as a method for combinatorial multiparameter regulation. Our findings demonstrated that the effect of SEIs on products was closely related to the discharge conditions. Under constant conditions, increasing the SEI led to the promotion of NO and N2O, suppression of NO2, and stabilization of ONOO. When the SEI was varied by adjusting the voltage, the product trend followed the same pattern as described above. However, when the SEI was varied by adjusting the gas flow rate, the product trend appeared to differ. As the gas flow rate increased, the discharge power remained almost unchanged, while the SEI decreased significantly, leading to the suppression of NO, N2O, NO2, and ONOO production. The magnetic field did not significantly alter the SEI, but it affected the products. Introducing a 0.2 T magnetic field under constant conditions promoted the production of NO while suppressing N2O, NO2 and ONOO formation. To understand the microscopic physicochemical mechanisms of product variations under multiple discharge parameters, we analyzed the chemical reaction network, presenting an overview of the effects of multiparameters on the generation of reactive nitrogen species. These insights hold significant value for plasma applications within the realm of biomedicine, where the regulated generation of reactive nitrogen species is pivotal in attaining the desired plasma performance.

Graphical abstract: Characteristics of chemical products under the NOx mode of dielectric barrier discharge: comprehensive effects of specific energy input and magnetic field

Supplementary files

Article information

Article type
Paper
Submitted
19 Sep 2024
Accepted
17 Mar 2025
First published
18 Mar 2025

Phys. Chem. Chem. Phys., 2025,27, 7975-7986

Characteristics of chemical products under the NOx mode of dielectric barrier discharge: comprehensive effects of specific energy input and magnetic field

K. Liu, J. Dai and X. Zhou, Phys. Chem. Chem. Phys., 2025, 27, 7975 DOI: 10.1039/D4CP03627A

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