| dc.description.abstract | With the rapid development of industrial and technological sectors, environmental issues have become increasingly serious. High-tech industries consume large amounts of ultrapure water and organic solvents in their production processes, leading to significant discharge of organic wastewater. Wastewater from the semiconductor industry typically contains isopropanol (IPA), commonly used as a cleaning and disinfecting agent in industrial and technological applications. The emission of organic compounds has raised considerable public concern due to their harmful effects on human health and the environment. This study investigates the removal of IPA and hydrogen production efficiency using Ni/TiO2 photocatalysts combined with liquid-phase plasma (LPP) in a laboratory-scale experimental system. Argon and oxygen gases were introduced into the reactor through mass flow controllers to generate gas bubbles. The Ni/TiO2 photocatalysts were prepared via the impregnation method. Experimental tests were conducted at room temperature, and degradation efficiency was analyzed using a COD analyzer, while products were analyzed using a CO? analyzer, hydrogen analyzer, and gas chromatography-mass spectrometry (GC/MS). During the liquid-phase plasma discharge process, abundant reactive species such as ‧OH, O‧, H‧ and H?O? were generated in the plasma-liquid system, facilitating IPA degradation. Experimental tests were conducted under various operating conditions, including plasma power, catalyst type, and catalyst concentration. Results showed that under conditions of 100 mg/L IPA, 150 μS/cm conductivity, pH 11, and an Ar:O? ratio of 1:1, the combination of LPP with 5 wt% Ni/TiO2 achieved an IPA removal efficiency of 93.9 ± 5.9%, with a hydrogen production rate of 697 ± 65.4 μmol/h?g. Furthermore, under conditions of 3,000 mg/L IPA, 150 μS/cm conductivity, pH 11, and pure argon gas, the hydrogen production rate increased to 2,437 ± 70.3 μmol/h?g. Thus, this study proposes a method capable of simultaneously achieving organic pollutant removal and hydrogen generation. The hydrogen produced can enhance the competitiveness of this technology in the market and potential applications in wastewater treatment. | en_US |