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Characteristics and Stability of Pulsed Gas–Liquid Discharge with the Addition of Photocatalysts

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Abstract

Gas–liquid discharge coupling with photocatalysts is an effective approach to enhance the chemical activity of plasma treated liquid. However, the incomplete understanding of the discharge characteristics with the addition of photocatalysts remain. The characteristics of pulsed gas–liquid discharge combining TiO2 or WO3 are studied in this work to address this issue. Results indicate that the addition of photocatalysts significantly promote the discharge, as evidenced by the diagnosis of discharge current, optical emission spectra, concentrations of aqueous species and solution properties. Specifically, the addition of catalysts enhances the discharge current and enrich the emission spectrum. The atomic emission lines O (3p–3s), N (3p–3s) and Hα were also observed with the addition of TiO2, followed by higher content of reactive species in the solution. However, the addition of catalysts makes the discharge more unstable. This study contributes to an improved understanding of the mechanism of gas–liquid discharge coupled with photocatalysts for the improvement in applications.

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Funding

This study is supported by the National Natural Science Foundation of China (Grant Nos. 52277151 and 51907088) and Innovative Talents Team Project of ‘Six Talent Peaks’ of Jiangsu Province (No. TD-JNHB-006).

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Authors and Affiliations

  1. College of Electrical Engineering and Control Science, Nanjing Tech University, Nanjing, 211816, People’s Republic of China

    Yuankun Ye, Zikai Zhou, Sen Wang & Zhi Fang

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  1. Yuankun Ye
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  3. Sen Wang
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YY wrote the main manuscript text, conducted the experiments and visualized the data. ZZ analyzed study data. SW developed the methodology, wrote and reviewed the manuscript. ZF contributed to the conceptualization and reviewed the manuscript.

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Correspondence to Sen Wang.

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Ye, Y., Zhou, Z., Wang, S. et al. Characteristics and Stability of Pulsed Gas–Liquid Discharge with the Addition of Photocatalysts. Plasma Chem Plasma Process 44, 335–352 (2024). https://doi.org/10.1007/s11090-023-10426-8

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