Abstract：Pulsed discharge plasma coupled photocatalysts can effectively improve the degradation efficiency of organic pollutants in water. The addition of catalysts will significantly affect the discharge characteristics, which in turn affects the generation of aqueous species and the degradation. In the paper, the discharge characteristics, plasma properties were investigated by electrical and optical diagnosis, and concentration of aqueous reactive species and tetracycline degradation were studied with the addition of TiO2. The influence of TiO2 on discharge characteristics and degradation mechanism of tetracycline was discussed. The results show that the peak current with TiO2 is higher than that without TiO2, and the increasing of current is enhanced with the increasing of voltage, and the peak current at 10kV pulse voltage increases by 2.8 times with the addition of TiO2. The spectra intensity N2(C-B), Hα and O(3p-3s) with TiO2 were also significantly enhanced compared to those without the addition of TiO2, and the concentration of H2O2 is increased by 7 times at 10kV voltage and 1kHz frequency. The addition of TiO2 also significantly improved the degradation rate. At the voltage of 7kV, the degradation rate was 85.9% after 10 minutes' treatment, which was an increase of 33.48% compared to that without TiO2.
周子凯, 卢旭, 王森, 方志. 含二氧化钛的脉冲气液放电特性及降解四环素研究[J]. 电工技术学报, 2022, 37(22): 5862-5871.
Zhou Zikai, Lu Xu, Wang Sen, Fang Zhi. Characteristics of Pulse Gas-Liquid Discharge and Tetracycline Degradation with the Addition of TiO2. Transactions of China Electrotechnical Society, 2022, 37(22): 5862-5871.
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